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Publications by the Stellar Group

2017

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2016

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2015

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2014

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2013

Vos, J., Østensen, R. H., Németh, P., et al.Nov 2013The orbits of subdwarf-B + main-sequence binaries. II. Three eccentric systems; BD +29°3070, BD +34°1543 and Feige 87Astronomy & Astrophysics, Volume 559, id.A54, 15 pp.

Østensen, R. H., Geier, S., Schaffenroth, V., et al.Nov 2013Binaries discovered by the MUCHFUSS project. FBS 0117+396: An sdB+dM binary with a pulsating primaryAstronomy & Astrophysics, Volume 559, id.A35, 11 pp.

Ostensen, R. H., Geier, S., Schaffenroth, V., et al.Oct 2013VizieR Online Data Catalog: FBS 0117+396 pulsating sdB star photometry (Ostensen+, 2013)VizieR On-line Data Catalog: J/A+A/559/A35. Originally published in: 2013A&A…559A..35O

Verbeek, Kars, Groot, Paul J., Nelemans, Gijs, et al.Oct 2013A determination of the space density and birth rate of hydrogen-line (DA) white dwarfs in the Galactic plane, based on the UVEX surveyMonthly Notices of the Royal Astronomical Society, Volume 434, Issue 4, p.2727-2741

Geier, S., Heber, U., Edelmann, H., et al.Sep 2013Hot subdwarf stars in close-up view. IV. Helium abundances and the 3He isotopic anomaly of subdwarf B starsAstronomy & Astrophysics, Volume 557, id.A122, 11 pp.

Geier, S., Heber, U., Heuser, C., et al.Aug 2013VizieR Online Data Catalog: SB 290 radial velocity curve (Geier+, 2013)VizieR On-line Data Catalog: J/A+A/551/L4. Originally published in: 2013A&A…551L…4G

Maxted, Pierre F. L., Serenelli, Aldo M., Miglio, Andrea, et al.Jun 2013Multi-periodic pulsations of a stripped red-giant star in an eclipsing binary systemNature, Volume 498, Issue 7455, pp. 463-465 (2013).

Irrgang, Andreas, Przybilla, Norbert, Heber, Urlich, et al.Jun 2013Investigating the Origin of Massive Runaway StarsMassive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece; Online at http://a2omega-conference.net, id.40

Geier, S., Marsh, T. R., Wang, B., et al.Jun 2013A progenitor binary and an ejected mass donor remnant of faint type Ia supernovaeAstronomy & Astrophysics, Volume 554, id.A54, 10 pp.

Schaffenroth, V., Geier, S., Drechsel, H., et al.May 2013A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveysAstronomy & Astrophysics, Volume 553, id.A18, 7 pp.

Verbeek, K., Groot, P. J., Scaringi, S., et al.Apr 2013VizieR Online Data Catalog: UVEX sources spectroscopic follow-up (Verbeek+, 2012)VizieR On-line Data Catalog: J/MNRAS/426/1235. Originally published in: 2012MNRAS.426.1235V

Deca, J., Marsh, T. R., Ostensen, R. H., et al.Mar 2013VizieR Online Data Catalog: Radial velocity monitoring of PG 1018-047 (Deca+, 2012)VizieR On-line Data Catalog: J/MNRAS/421/2798. Originally published in: 2012MNRAS.421.2798D

Heber, U., Geier, S., Gaensicke, B., Mar 2013Hot subluminous stars: Highlights from the MUCHFUSS and Kepler missions40th Liège International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, Liège, Belgium, Edited by J. Montalbán; A. Noels; V. Van Grootel; EPJ Web of Conferences, Volume 43, id.04002

Geier, S., Heber, U., Heuser, C., et al.Mar 2013The subdwarf B star SB 290 – A fast rotator on the extreme horizontal branchAstronomy & Astrophysics, Volume 551, id.L4, 5 pp.

Drilling, J. S., Jeffery, C. S., Heber, U., et al.Mar 2013An MK-like system of spectral classification for hot subdwarfsAstronomy & Astrophysics, Volume 551, id.A31, 12 pp.

Maxted, P. F. L., Heber, U., Smalley, B., et al.Feb 2013Stripped red giant cores in eclipsing binary star systemsSetting a New Standard in the Analysis of Binary Stars, Edited by K. Pavlovski, A. Tkachenko and G. Torres. EAS Publications Series, Vol. 64, 2013, pp.353-359

Geier, S., Marsh, T. R., Dunlap, B. H., et al.Jan 2013Discovery of the Closest Hot Subdwarf Binary with White Dwarf Companion18th European White Dwarf Workshop. Proceedings of a conference held 13-17 August, 2012, at the Pedagogical University of Cracow, Poland. Edited by J. Krzesiń;ski, G. Stachowski, P. Moskalik, and K. Bajan. ASP Conference Proceedings, Vol. 469. San Francisco: Astronomical Society of the Pacific., p.373

Hudec, René, Kopel, Fabian, Macsics, Robert, et al.2013Classification of Variable Objects for Search for GRB Candidates on Bamberg Photographic PlatesProceedings of IBWS2012, Published in Acta Polytechnica, Vol. 53, No. 3, p.27

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2012

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2011

Maxted, P. F. L., Anderson, D. R., Burleigh, M. R., et al.Dec 2011Discovery of a stripped red giant core in a bright eclipsing binary systemMonthly Notices of the Royal Astronomical Society, Volume 418, Issue 2, pp. 1156-1164.

Sordo, R., Vallenari, A., Tantalo, R., et al.Dec 2011Stellar libraries for GaiaJournal of Physics: Conference Series, Volume 328, Issue 1, id. 012006 (2011).

Geier, S., Hirsch, H., Tillich, A., et al.Aug 2011VizieR Online Data Catalog: Priority targets for the MUCHFUSS project (Geier+, 2011)VizieR On-line Data Catalog: J/A+A/530/A28. Originally published in: 2011A&A…530A..28G

Barlow, Brad N., Geier, Stephan, Tillich, Alfred, et al.Aug 2011The MUCHFUSS project: Searching for the most massive companions to hot subdwarf stars (follow-up)NOAO Proposal ID 2011B-0290

Copperwheat, C. M., Morales-Rueda, L., Marsh, T. R., et al.Aug 2011Radial-velocity measurements of subdwarf B starsMonthly Notices of the Royal Astronomical Society, Volume 415, Issue 2, pp. 1381-1395.

Hudec, René, Kopel, Fabian, Krapp, Pedro, et al.Aug 2011The Optical Transient Search in the Bamberg Plate ArchiveGAMMA RAY BURSTS 2010. AIP Conference Proceedings, Volume 1358, pp. 381-384 (2011).

Østensen, R. H., Silvotti, R., Charpinet, S., et al.Jul 2011First Kepler results on compact pulsators – VI. Targets in the final half of the survey phaseMonthly Notices of the Royal Astronomical Society, Volume 414, Issue 4, pp. 2860-2870.

Balona, L. A., Pigulski, A., De Cat, P., et al.Jun 2011Kepler observations of the variability in B-type starsMonthly Notices of the Royal Astronomical Society, Volume 413, Issue 4, pp. 2403-2420.

Geier, S., Hirsch, H., Tillich, A., et al.Jun 2011The MUCHFUSS project – searching for hot subdwarf binaries with massive unseen companions. Survey, target selection and atmospheric parametersAstronomy & Astrophysics, Volume 530, id.A28, 14 pp.

Ostensen, R. H., Silvotti, R., Charpinet, S., et al.May 2011VizieR Online Data Catalog: Kepler compact pulsator candidates (Ostensen+, 2010)VizieR On-line Data Catalog: J/MNRAS/409/1470. Originally published in: 2010MNRAS.409.1470O

Geier, S., Classen, L., Heber, U., May 2011The Fast-rotating, Low-gravity Subdwarf B Star EC 22081-1916: Remnant of a Common Envelope Merger EventThe Astrophysical Journal Letters, Volume 733, Issue 1, article id. L13, 5 pp. (2011).

Geier, S., Schaffenroth, V., Drechsel, H., et al.Apr 2011Binaries Discovered by the MUCHFUSS Project: SDSS J08205+0008—An Eclipsing Subdwarf B Binary with a Brown Dwarf CompanionThe Astrophysical Journal Letters, Volume 731, Issue 2, article id. L22, 5 pp. (2011).

Geier, S., Napiwotzki, R., Heber, U., et al.Apr 2011Binaries discovered by the SPY survey. VI. Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB 5 – a recently ejected common envelope?Astronomy & Astrophysics, Volume 528, id.L16, 4 pp.

Classen, Lew, Geier, Stephan, Heber, Ulrich, et al.Mar 2011Radial Velocity Survey of Low-Mass Companions to sdB StarsPLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331, pp. 297-303 (2011).

Schaffenroth, Veronika, Geier, Stephan, Heber, Ulrich, et al.Mar 2011Analysis of Two Eclipsing Hot Subdwarf Binaries with a Low Mass Stellar and a Brown Dwarf CompanionPLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331, pp. 174-181 (2011).

O’Toole, Simon, Heber, Ulrich, Geier, Stephan, et al.Mar 2011Radial Velocity Search for Substellar Companions to sdB StarsPLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331, pp. 170-172 (2011).

Geier, Stephan, Heber, Ulrich, Tillich, Alfred, et al.Mar 2011Substellar Companions and the Formation of Hot Subdwarf StarsPLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331, pp. 163-169 (2011).

Heber, Ulrich, Drechsel, Horst, Schuh, Sonja, Mar 2011PrefacePLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331, pp. 1-4 (2011).

Mar 2011PrefacePlanetary Systems Beyond the Main Sequence: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1331. AIP Conference Proceedings, Volume 1331, Issue 1, p.1-4

Schuh, Sonja, Drechsel, Horst, Heber, Ulrich, Mar 2011PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International ConferencePLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE: Proceedings of the International Conference held 11-14 August, 2010 in Bamberg, Germany. AIP Conference Proceedings, Volume 1331. ISBN 978-0-7354-0886-9

Tillich, A., Heber, U., Geier, S., et al.Mar 2011The Hyper-MUCHFUSS project: probing the Galactic halo with sdB starsAstronomy & Astrophysics, Volume 527, id.A137, 11 pp.

Geier, S., Maxted, P. F. L., Napiwotzki, R., et al.Feb 2011Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS). Analysis of seven close subdwarf B binariesAstronomy and Astrophysics, Volume 526, id.A39, 13 pp.

Bloemen, S., Marsh, T. R., Østensen, R. H., et al.Jan 2011Kepler observations of the beaming binary KPD 1946+4340Monthly Notices of the Royal Astronomical Society, Volume 410, Issue 3, pp. 1787-1796.

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2010

Østensen, R. H., Silvotti, R., Charpinet, S., et al.Dec 2010First Kepler results on compact pulsators – I. Survey target selection and the first pulsatorsMonthly Notices of the Royal Astronomical Society, Volume 409, Issue 4, pp. 1470-1486.

Müller, Sebastian, Geier, Stephan, Heber, Ulrich, Dec 2010AA Doradus and its Cool Companion – The Influence of Enhanced Metal Line Blanketing and the Reflection Effecteprint arXiv:1012.3908

Hessman, F. V., Dhillon, V. S., Winget, D. E., et al.Dec 2010On the naming convention used for multiple star systems and extrasolar planetseprint arXiv:1012.0707

Schaffenroth, V., Geier, S., Heber, U., et al.Dec 2010Analysis of Two Eclipsing Hot Subdwarf Binaries with a Low Mass Stellar and a Brown Dwarf CompanionINTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink’s 65th Birthday. AIP Conference Proceedings, Volume 1314, pp. 91-92 (2010).

Heber, Ulrich, Hirsch, Heiko, Dec 2010The Origin of Subluminous O StarsINTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink’s 65th Birthday. AIP Conference Proceedings, Volume 1314, pp. 79-84 (2010).

Geier, S., Heber, U., Tillich, A., et al.Dec 2010The MUCHFUSS Project-Searching for Massive Compact Companions to Hot Subdwarf StarsINTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink’s 65th Birthday. AIP Conference Proceedings, Volume 1314, pp. 67-72 (2010).

Geier, S., Heber, U., Tillich, A., et al.Nov 2010Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS)-Status report17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 263-268 (2010).

Classen, L., Geier, S., Heber, U., et al.Nov 2010RV survey of low-mass companions to sdB stars17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 247-250 (2010).

Schaffenroth, V., Geier, S., Heber, U., et al.Nov 2010Analysis of two eclipsing hot subdwarf binaries with a low mass stellar and a brown dwarf companion17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 243-246 (2010).

Kupfer, T., Heber, U., Przybilla, N., et al.Nov 2010Extreme Helium Stars: Model Atmospheres and a NLTE analysis of BD+10°217917TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 209-212 (2010).

Oreiro, R., Telting, J. H., Østensen, R. H., et al.Oct 2010Synthetic pulsational line profile variationsAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 211-216

Baran, Andrzej, Telting, John, Østensen, Roy, et al.Oct 2010Constraining the degree of the dominant mode in QQ VirAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 199-203

Østensen, R. H., Telting, J. H., Oreiro, R., et al.Oct 2010Time-resolved spectroscopy of the sdBV V338 SerpentisAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 167-174

Telting, J., Østensen, R., Oreiro, R., et al.Oct 2010Time-resolved high-resolution spectroscopy of the pulsating sdB star QQ Vir (PG1325+101)Astrophysics and Space Science, Volume 329, Issue 1-2, pp. 163-166

Geier, S., Heber, U., Edelmann, H., et al.Oct 2010Metal abundances of subdwarf B stars—the extended sampleAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 127-131

Müller, S., Geier, S., Heber, U., Oct 2010The cool companion of AA Doradus—Brown dwarf or late M star?Astrophysics and Space Science, Volume 329, Issue 1-2, pp. 101-105

Geier, S., Heber, U., Tillich, A., et al.Oct 2010Hot subdwarfs in binary systems and the nature of their unseen companionsAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 91-99

Tillich, A., Geier, S., Heber, U., et al.Oct 2010The HYPER-MUCHFUSS project—the constant high-velocity populationAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 69-76

Tillich, A., Geier, S., Heber, U., et al.Oct 2010The HYPER-MUCHFUSS project—target selection and analysisAstrophysics and Space Science, Volume 329, Issue 1-2, pp. 63-68

Geier, S., Heber, U., Podsiadlowski, Ph., et al.Sep 2010Hot subdwarf stars in close-up view. I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companionsAstronomy and Astrophysics, Volume 519, id.A25, 27 pp.

Przybilla, Norbert, Tillich, Alfred, Heber, Ulrich, et al.Jul 2010Weighing the Galactic Dark Matter Halo: A Lower Mass Limit From the Fastest Halo Star KnownThe Astrophysical Journal, Volume 718, Issue 1, pp. 37-42 (2010).

Tillich, A., Przybilla, N., Scholz, R.-D., et al.Jul 2010A halo blue straggler on a highly eccentric retrograde orbitAstronomy and Astrophysics, Volume 517, id.A36, 6 pp.

Geier, S., Heber, U., Kupfer, T., et al.Jun 2010Binaries discovered by the SPY project . V. GD 687 – a massive double degenerate binary progenitor that will merge within a Hubble timeAstronomy and Astrophysics, Volume 515, id.A37, 5 pp.

Østensen, R. H., Oreiro, R., Solheim, J.-E., et al.Apr 2010A survey for pulsating subdwarf B stars with the Nordic Optical TelescopeAstronomy and Astrophysics, Volume 513, id.A6, 15 pp.

Groot, P. J., Verbeek, K., Greimel, R., et al.Mar 2010VizieR Online Data Catalog: Simulated UVEX colors with reddening (Groot+, 2009)VizieR On-line Data Catalog: J/MNRAS/399/323. Originally published in: 2009MNRAS.399..323G

Irrgang, Andreas, Przybilla, Norbert, Heber, Ulrich, et al.Mar 2010The Nature of the Hyper-Runaway Candidate Hip 60350The Astrophysical Journal, Volume 711, Issue 1, pp. 138-143 (2010).

Ostensen, R. H., Oreiro, R., Solheim, J.-E., et al.Jan 2010VizieR Online Data Catalog: NOT survey of subdwarf B stars (Ostensen+, 2010)VizieR On-line Data Catalog: J/A+A/513/A6. Originally published in: 2010A&A…513A…6O

Irrgang, A., Przybilla, N., Heber, U., et al.2010HIP 60350: A supernova ejected hyper-runaway star?“Proceedings of the 11th Symposium on Nuclei in the Cosmos. 19-23 July 2010. Heidelberg, Germany. Published online at Published online at http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=100, id.151”

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