Conference Papers & Multi-media Presentations
2023
Lecture: Winds of Luminous Blue Variables and Cool Hypergiant Stars
Invited Lecturer: International Summer School: Stellar Winds and Outflows, Harrachov, Czech Republic, 3-15 Sep 2023
School Website
Lecture: Using Online Databases
Invited Lecturer: International Summer School: Stellar Winds and Outflows, Harrachov, Czech Republic, 3-15 Sep 2023
School Website
CU6 Multi Transit Analysis - Non-Constancy Detection: Data Release 4 Progress report
Contributed Talk by Teleconference: ESA-Gaia Coordination Unit 6, 34th Workshop, Apr 2023
2022
CU6 Multi Transit Analysis - Non-Constancy Detection: Validation of RV Outliers Detection
Contributed Talk: ESA-Gaia Coordination Unit 6, 32nd Workshop, CNES, Toulouse, France, Sep 2022
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk by Teleconference: ESA-Gaia Coordination Unit 6, 31st Workshop, Jun 2022
ESA-Gaia Data Release 3: Gaia at the Royal Observatory of Belgium
Pressconference Presentation: Gaia Outreach DR3 local event, Planetarium, Brussels, 13 Jun 2022
ROB Planetarium Live Stream, 13 Jun 2022
Belgian astronomers help create the most detailed survey of our Milky Way
Royal Observatory of Belgium Press Release 13 Jun 2022.
Link to:
ROB Press release website
and
ROB Astronomy and Astrophysics website
The asymmetric Milky Way in motion
Video Production and Presentation: European Space Agency - TV, Gaia Data Release 3 - Documentary, 13 June 2022
ESA - TV, Gaia DR3, 13 Jun 2022
Een precieze kaart van de sterrenhemel dankzij de ESA-satelliet Gaia
Invited Public Lecture: Astroclub, Volkssterrenwacht Mira, Grimbergen, Belgium, 24 June 2022
Mira, Public Lecture Announcement, 24 Jun 2022
Gaia
Invited Seminar: Seminars Astronomy, Volkssterrenwacht Urania, Hove, Belgium, 4 Oct 2022
Urania, Online Seminars Astronomy, 4 Oct 2022
2021
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk by Teleconference: ESA-Gaia DPAC Coordination Unit 6, 30th Workshop, Nov 2021
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk by Teleconference: ESA-Gaia DPAC Coordination Unit 6, 29th Workshop, May 2021
CU6 Multi Transit Analysis - Non-Constancy Detection: Transit outlier analysis
Contributed Talk by Teleconference: ESA-Gaia DPAC Coordination Unit 6, STA-MTA RV Outliers Detection Meeting, Dec 2021
Gaia Archive Access System: OBA stars using GaiaSky
Contributed Talk by Teleconference: ESA-Gaia CU8 - Gaia Milky Way Working Group Meeting, Dec 2021
Multiplicity of Luminous Blue Variable Stars
Contributed Talk by Teleconference: EC Horizon 2020 - Physics of Extreme Massive Stars, POEMS Virtual Workshop, Dec 2021
2020
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk by Teleconference: ESA-Gaia DPAC Consortium Meeting 2020 Coordination Unit 6, March 2020
CU6 Multi Transit Analysis - Non-Constancy Detection: RV Outliers Detection
Contributed Talk by Teleconference: ESA-Gaia DPAC Consortium Meeting 2020 CU6-CU4 Splinter, March 2020
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk by Teleconference: ESA-Gaia Coordination Unit 6 DR3 Post-Processing Meeting, July 2020
CU6 Multi Transit Analysis - Non-Constancy Detection: RV Filters
Contributed Talk by Teleconference: ESA-Gaia Coordination Unit 6 DR3 Post-Processing Meeting, July 2020
The map of our Galaxy keeps getting better
Royal Observatory of Belgium News Release Dec 2020.
Link to:
ROB website
30 years Hubble Space Telescope: Alex Lobel - astrofysicus KSB
Video presentation by the Royal Observatory of Belgium - Planetarium, Brussels, Apr 2020
Online published video, 25 Apr 2020
2019
The Belgian Repository of fundamental Atomic data and Stellar Spectra
Contributed Talk: ASOS 2019, The 13th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, Fudan Univ., Shanghai, China, June 2019
Seminar, Fudan Univ., 27 Jun 2019
The Belgian Repository of fundamental Atomic data and Stellar Spectra
Contributed Talk: Solvay Workshop on New Frontiers in Atomic, Nuclear, Plasma and Astrophysics, Univ. Brussels (ULB), Nov 2019
The Belgian Repository of fundamental Atomic data and Stellar Spectra
Poster: Solvay Workshop on New Frontiers in Atomic, Nuclear, Plasma and Astrophysics, Univ. Brussels (ULB), Nov 2019
Astrophysics Research at the Royal Observatory of Belgium
Invited Talk: 100 Years of IAU, ROB Astronomy Day, 19 Sep 2019
CU6 Multi Transit Analysis - Non-Constancy Detection: Statistical Parameters Outliers and rvConstancyProbability
Contributed Talk: ESA-Gaia Coordination Unit 6, 27th Workshop, Brussels, Belgium, Oct 2019
CU6 Multi Transit Analysis - Non-Constancy Detection: Outliers and Robust Statistical Parameters
Contributed Talk: ESA-Gaia Coordination Unit 6, 26th Workshop, Toulouse, France, Feb 2019
Astronomers show how supergiant stars repeatedly cool and heat up
Royal Observatory of Belgium Press Release Oct 2019.
Link to:
ROB website
2018
CU6 Multi Transit Analysis - Non-Constancy Detection: Status Update
Contributed Talk: ESA-Gaia Coordination Unit 6 25th Workshop, Liege, Belgium, Jun 2018
CU6 Multi Transit Analysis - Non Constancy Detection: Statistical Parameters of Time-series
Contributed Talk: ESA-Gaia DPAC Plenary Meeting, Abano Terme, Italy, Oct 2018
Multi Transit Analysis - Non Constancy Detection: Statistical Parameters for CU6 RV Time-series
Invited Talk: ESA-Gaia Coordination Unit 7 Plenary Meeting, Paris Obs., France, Dec 2018
The Gaia Mission of the European Space Agency
Invited Seminar: Jongeren Vereniging Sterrenkunde - Vereniging Voor Sterrenkunde -weekend, Ostend, Viamundo, Belgium, Oct 2018
Stellar Spectroscopy at the Royal Observatory of Belgium
Invited Seminar: Vereniging voor Sterrenkunde Spectroscopiedag, Tivoli Obs., Oudenbosch, Netherlands, Nov 2018
Belgian astronomers help to compile the most detailed 3D map of our Galaxy ever made
Royal Observatory of Belgium Press Release Apr 2018.
Link to:
ROB website
2017
The Belgian Repository of fundamental Atomic data and Stellar Spectra
Invited Talk: Workshop on Astrophysical Opacities, Univ. of Western Michigan, Kalamazoo, USA, Aug 2017
The Belgian Repository of Fundamental Atomic Data and Stellar Spectra: an insight into systematic line selection
Poster: Workshop on Astrophysical Opacities, Univ. of Western Michigan, Kalamazoo, USA, Aug 2017
CU6 Auxiliary Data: Radial Velocities of Hot Stars
Contributed Talk: ESA-Gaia Coordination Unit 6, 24th Workshop, Obs. de Paris, France, Dec 2017
Radiative Transfer Modelling of Hot Star Winds
Seminar: Dep. of Astrophysics at Golm Campus, Univ. Potsdam, Germany, Nov 2017
Hot Topics in Hypergiants and Luminous Blue Variables Research
Invited review: Tartu Obs., Toravere, Estonia, Seminar in preparation of EC Horizon 2020 networking proposal on massive stars research, Sep 2017
Seminar, Tartu Obs., 11 Sep 2017
Binarity: the clue to understanding the behaviour of LBVs and their surrounding environment?
Poster: Int. conference on The Impact of Binaries on Stellar Evolution (ImBaSE2017), ESO Garching, Jul 2017
The impact of binarity on the LBV phenomenon
Poster: Int. conference on The Impact of Binaries on Stellar Evolution (ImBaSE2017), ESO Garching, Jul 2017
Eerbetoon aan Prof. C. de Jager
Oral Tribute: Univ. Ghent, Volkssterrenwacht Armand Pien, 4 Nov 2017
2016
The Belgian Repository of fundamental Atomic data and Stellar Spectra: Status Update 2015-2016
Invited Talk: 12th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, Universidade de Sao Paulo, Brazil, Jul 2016
The Belgian Repository of fundamental Atomic data and Stellar Spectra: Status Update 2015-2016
Poster: 12th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, Universidade de Sao Paulo, Brazil, Jul 2016
Imaging and Spectroscopy of the Massive Binaries MWC 314 and HD 168625
Invited review: Int. Conf. on B[e] Stars 2016, Prague, Czech Rep, 24-30 Jun 2016
2015
Spectral analysis of A-type stars in the Gaia-ESO Survey
Invited Talk: Int. Conf. on Massive Stars and the Gaia-ESO Survey, Royal Observatory of Belgium, Brussels, 5-7 May 2015
A-type stars in the Gaia - ESO Survey: DR4 analysis results
Poster: Int. Conf. on Gaia-ESO Survey Third Science Meeting, 1-4 Dec 2015, Vilnius, Lithuania
Imaging and Spectroscopy of the Massive Binaries MWC 314 and HD 168625
Poster: Int. Conf. on The Physics of Evolved Stars. A Conference Dedicated to the Memory of Olivier Chesneau, June 8-12 2015, Nice, France
Yellow Hypergiants: a comparative study of HR 5171A, Rho Cas and HR 8752
Poster: Int. Conf. on The Physics of Evolved Stars. A Conference Dedicated to the Memory of Olivier Chesneau, June 8-12 2015, Nice, France
Mystery Yellow Hypergiant HR 5171 solved
Royal Observatory of Belgium Press Release Dec 2015.
Link to:
ROB website
2014
Modeling DACs and Rotational Modulations in J Puppis.
Talk: Magnetism and variability in O stars, Univ. Amsterdam, Netherlands, Sep 2014.
(5.7 Mb
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Modeling the Asymmetric Wind of the Luminous Blue Variable Binary MWC 314A.
Talk: 5 years of HERMES, Univ. Leuven, Belgium, Sep 2014.
(1 Mb
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Microturbulence velocity of A-type stars in the Gaia ESO Public Spectroscopic Survey.
Poster: EWASS 2014 : European Week of Astronomy and Space Science, Geneva, Switzerland, Jul 2014.
(0.3 Mb
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Discrete absorption components in the massive LBV Binary MWC 314.
Poster paper: IAU 307 : New Windows on massive stars: asteroseismology, interferometry and spectropolarimetry, Univ. Geneva, Switzerland, Jun 2014.
(0.2 Mb
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VLT Spots Largest Yellow Hypergiant Star.
Press Release European Southern Observatory, Mar 2014.
Link to:
ESO Science Release 1409
Auxilairy data for CU8 : astrophysical parameters of OBA stars.
Talk: Ground Based Observations for Gaia : Meeting 14, Telecon, Jan 2014.
(0.8 Mb
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2013
Modeling the Asymmetric Wind of the Luminous Blue Variable MWC 314.
Contributed Talk: Mercator-HERMES Consortium days, Univ. Leuven, Belgium, Sep 2013.
(3.0 Mb
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Atomic Data Requirements for Large Spectroscopic Surveys: ESA Gaia and ESO GES.
Contributed Talk: 11th Int. Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, Univ. Mons, Belgium, Aug 2013.
(9.0 Mb
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3-D Radiative Transfer Modeling of Rotational Modulations in the Blue Supergiant J Puppis.
Contributed Talk: Massive Stars: from α to Ω, Rhodes, Greece, Jun 2013.
(8.0 Mb
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Astrophysical Parameters of A-stars in the Young Open Clusters NGC 3293 and NGC 6705.
Poster: Gaia ESO Public Spectroscopic Survey First Science Meeting, Nice, France, Apr 2013.
(2.0 Mb
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2012
Hypergiant star amazes for 30 years.
Royal Observatory of Belgium Press Release Nov 2012.
Link to:
ROB website
The White Hypergiants HR 8752, IRC+10420, and 6 Cas Close to the Yellow Evolutionary Void.
Poster paper, 370 Years of Astronomy in Utrecht, Noordwijkerhout, Netherlands, Apr 2012.
(0.3 Mb
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Workshop Report: Quantitative Spectroscopy and Comparative Spectrum Modeling, Brussels, June 2011.
Invited talk, European Week of Astronomy and Space Science 2012, Special Meeting 2: GREAT PM5, Rome, Jul 2012.
(4.6 Mb
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Spectroscopic Observations of Benchmark & Reference Hot Stars for Gaia.
Contributed talk, European Week of Astronomy and Space Science 2012, Symposium S5, Rome, Jul 2012.
(2.9 Mb
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Quantitative Spectroscopy of Massive Hot Stars.
Invited Seminar, Univ. of Leuven, CPA & IvS Seminars, Apr 2012.
(8 Mb
pdf)
Gaia DPAC CU8 Report: Ground-based Observations of Gaia Benchmark and Reference Hot Stars.
Contributed talk, Ground Based Observations for Gaia GBOG Meeting 12, Oct 2012.
(1.2 Mb
pdf)
2011
Stellar Atmospheres in the Gaia Era: Quantitative Spectroscopy and Comparative Spectrum Modeling.
Workshop Summary, Free Univ. of Brussels (VUB), Belgium, 24 June 2011.
(3.5 Mb
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Link to:
Workshop program
Stellar Atmospheres in the Gaia Era.
Conference review paper (0.5 Mb
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Modeling the Asymmetric Wind of Massive LBV Binary MWC 314.
Poster paper, ASP Conf. Ser. 2012, Four Decades of Massive Star Research - A Scientific Meeting in Honor of A. Moffat, Auberge du Lac Taureau, Quebec, Canada, 11-15 July 2011.
(1.1 Mb
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Gaia-ESO Survey WG13: OBA-star Spectrum Analyses.
Invited Talk, The UVES Analysis of the Gaia-ESO Survey: tests, tools, and survey implementation, ESO, Garching, Germany, 26-27 Sep 2011.
(4.8 Mb
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2010
SpectroWeb Database Development.
Contributed Talk, HERMES Spectrograph Science Meeting, Univ. of Leuven, Belgium, Oct. 2010.
(1.2 Mb
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Long-term Spectroscopic Monitoring of Luminous Blue Variables and Hypergiants.
Contributed Talk, HERMES Spectrograph Science Meeting, Univ. of Leuven, Belgium, Oct. 2010.
(3.4 Mb
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Oscillator Strength Measurements of Atomic Absorption Lines from Stellar Spectra.
Contributed Talk, 10th Int. Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas, ASOS 10
Univ. California Berkeley, CA, USA, Aug. 2010.
(1.4 Mb
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Long-term Spectroscopic Monitoring of LBVs and LBV Candidates.
Poster paper, IAU Symposium 272, Active OB Stars: Structure, Evolution, Mass loss and Critical Limits, Paris, France, July 2010.
(0.7 Mb
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3-D Radiative Transfer Modeling of Structured Winds in Massive Hot Stars with Wind3D.
Contributed Talk, 39th Liege Int. Astroph. Coll., The multi-wavelength View of Hot, Massive Stars, Liege, Belgium, July 2010.
(7.6 Mb
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Gaia GREAT-ESF PM3: Stellar Atmospheres.
Contributed Talk, Gaia GREAT Plenary Meeting 3: Group B, ESTEC, Noordwijk, The Netherlands, June 2010.
(1.8 Mb
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Gaia GREAT-ESF in Belgium: Stellar Atmopsheres.
Invited Talk, Gaia GREAT WG Meeting on Double and Multiple Stars, Univ. Libre de Bruxelles, Belgium, May 2010.
(2.6 Mb
pdf)
2009
Data Mining and Processing of Ground-based Observations for ESP-ELS in CU8.
Contributed Talk, 6th Ground Based Observations for Gaia Meeting, Nice, France, Nov. 2009.
(2.4 Mb
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Parametrized Structured Wind Modelling of Massive Hot Stars with Wind3D.
Poster paper, 27th General Assembly of the Int. Astronomical Union, Rio de Janeiro, Brazil, Aug. 2009.
(3.8 Mb
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Radiative Transfer Modelling of Rotational Modulations in B Supergiant HD 64760.
Poster paper, 27th General Assembly of the Int. Astronomical Union, Rio de Janeiro, Brazil, Aug. 2009.
(2.4 Mb
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Hot Stars Survey with the Gaia Space Mission.
Poster paper, 27th General Assembly of the Int. Astronomical Union, Rio de Janeiro, Brazil, Aug. 2009.
(1.1 Mb
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2008
Radiative Transfer Modeling of the Winds & Circumstellar Environments of Hot And Cool Massive Stars.
Contributed Talk, Hot And Cool: Bridging Gaps in Massive Star Evolution, Caltech Campus, Pasadena, USA, Nov. 2008.
(3.6 Mb
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Link to:
Presentation & animations
3-D Radiative Transfer Modelling of Massive-Star UV Wind Line Variability.
Contributed Talk, 38th Liege Int. Astrophysical Colloquium, Liege, Belgium, July 2008.
(0.3 Mb
pdf)
Link to:
Presentation & animations
2007
SpectroWeb: Oscillator Strength Measurements of Atomic Absorption Lines in the Sun and Procyon.
Poster paper, Int. Conf. on ASOS 9, Lund, Sweden, Aug 2007.
(0.7 Mb
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Modeling Discrete Absorption Components in Ultraviolet Lines of Massive Hot Stars.
Contributed talk, Int. Conf. on Clumping in Hot Stars, Potsdam, Germany, June 2007.
(0.9 Mb
pdf)
Link to:
Presentation & animations
Link to:
Corotating Interaction Regions in Hot Star Winds at ROB
2006
SpectroWeb: An Interactive Graphical Database of Digital Stellar Spectral Atlases.
Poster paper, 26th General Assembly of the Int. Astronomical Union, Prague, Czech Rep., Aug 2006.
(0.8 Mb
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Three Dimensional Radiative Transfer in Winds of Massive Stars: Wind3D.
Poster paper, 26th General Assembly of the Int. Astronomical Union, Prague, Czech Rep., Aug 2006.
(0.3 Mb
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2005
The Origin and Variability of the CO Near-IR Band in the Yellow Hypergiant ρ Cassiopeiae.
Poster paper, American Astronomical Society Meeting 205, Jan 2005, San Diego, USA.
(1.9 Mb
pdf)
2004
Semi-empiric Radiative Transfer Modeling of FUSE Stellar Spectra.
Poster paper, Int. Conf. on Five Years of Discovery with FUSE, Victoria, Canada, Aug 2004.
(0.4 Mb
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Spatially Resolved STIS Spectra of Betelgeuse's Upper Chromosphere and Circumstellar Dust Envelope.
Contributed talk, Int. Conf. on Cool Stars 13, Hamburg, Gemany, Jul 2004.
(2.1 Mb
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PowerPoint presentation & animations
Mass-loss and Recent Spectral Changes in the Yellow Hypergiant ρ Cassiopeiae.
Poster paper, Int. Conf. on Cool Stars 13, Hamburg, Germany, Jul 2004.
(1.3 Mb
pdf)
Storms of Hot and Cold Gas Rage in Betelgeuse's Turbulent Atmosphere.
Press Release, American Astronomical Society Meeting, Atlanta, USA, Jan 2004.
Press Release (0.2 Mb pdf)
Link to:
Harvard Univ. website
2003
Spatially Resolved STIS Spectroscopy of Betelgeuse's Outer Atmosphere.
Poster paper, 25th General Assembly of the Int. Astronomical Union, Sydney, Australia, Jul 2003.
(0.4 Mb
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Spectroscopy of the Millennium Outburst and Recent Variability of the Yellow Hypergiant ρ Cassiopeiae.
Poster paper, 25th General Assembly of the Int. Astronomical Union, Sydney, Australia, Jul 2003.
(0.4 Mb
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The Throes of a Hypergiant Star Facing Death: Rho Cassiopeiae's Monster Atmosphere Explodes Violently.
Press Conference, American Astronomical Society Meeting, Seattle, USA, Jan 2003.
Press Release
Link to:
Harvard Univ. website
Press Conference presentation and animation.
2002
The Millennium Outburst of the Cool Hypergiant ρ Cassiopeiae: Spectroscopy and Modeling.
Poster paper, Int. Astronomical Union Meeting 210, Uppsala, Sweden, Jun 2002.
(0.6 Mb
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Modeling FUSE Spectra of Cool Luminous Stars.
Poster presentation, First FUSE Science & Data Workshop, Baltimore, USA, Aug 2002.
(0.7 Mb
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Spectroscopy of the Rho Cas Millennium Outburst.
Poster presentation, American Astronomical Society Meeting 199, Washington DC, USA, Jan 2002.
(0.5 Mb
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2001
Chromospheric Dynamics of Betelgeuse from STIS Spectra.
Contributed talk, Int. Conf. on Cool Stars 12, Boulder, USA, Jul 2001.
(1.3 Mb
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The Chromospheres of G-type Ib Supergiants.
Poster paper, American Astronomical Society Meeting 197, San Diego, USA, Jan 2001.
(0.67 Mb
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2000
Will HR 8752 Become a P Cygni Type Star?
Poster paper, Int. Conf. P Cygni 2000, Armagh, UK, Jul 2000.
(text)
Spatially resolved Space Telescope Imaging Spectrograph Spectroscopy of Betelgeuse: Evidence for Non-Radial Chromospheric Oscillation from Detailed Modeling.
Contributed talk, Int. Conf. on Eta Car and Other Mysterious Stars, Hven, Sweden, Aug 2000.
(0.3 Mb
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Like a Human Heart: Betelgeuse's Chromosphere Beats Asymmetrically.
Press Release, American Astronomical Society Meeting, Atlanta, USA, Jan 2000.
Link to:
Harvard Univ. website
1999
Spatially Resolved Tomographic Space Telescope Imaging Spectrograph Spectroscopy of Betelgeuse.
Poster paper, Int. Conf. on Cool Stars 11, Tenerife, Spain, Oct 1999.
(1.8 Mb
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Stellar Evolution of the Hypergiants HR 8752 and ρ Cassiopeiae on Human Timescales.
Poster paper, Int. Conf. on Cool Stars 11, Tenerife, Spain, Oct 1999.
(1.7 Mb
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1992-1998 (incomplete)
The Variable Spectrum of the Yellow Hypergiant ρ Cassiopeiae.
Poster paper, Int. Conf. on Cool Stars 10, Cambridge, USA, Jul 1997.
(1.8 Mb
pdf
and
split line variability animation )
The Atmospheric Model Parameters of Eta Leo.
Contributed talk, Int. Conf. on Instabilities in Evolved Super- and Hypergiants, Amsterdam, The Netherlands, Feb 1991.
(0.3 Mb
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The Instability Parameters of Stellar Atmospheres.
Contributed talk, Int. Conf. on Instabilities in Evolved Super- and Hypergiants, Amsterdam, The Netherlands, Feb 1991.
(0.3 Mb
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