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28 papers · 2 filters
The incidence of stellar mergers and mass gainers among massive stars
S. E. de Mink, H. Sana, N. Langer +2
Because the majority of massive stars are born as members of close binary systems, populations of massive main-sequence stars contain stellar mergers and products of binary mass tr…
Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57-531906.1
H. M. J. Boffin, D. Pourbaix, K. Muzic +7
Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the cl…
On the nature of the WO3 star DR1 in IC 1613
F. Tramper, G. Gräfener, O. E. Hartoog +8
We present the results of a quantitative spectroscopic analysis of the oxygen-sequence Wolf- Rayet star DR1 in the low-metallicity galaxy IC 1613. Our models suggest that the stron…
The ages of young star clusters, massive blue stragglers and the upper mass limit of stars: analysing age dependent stellar mass functions
Fabian R. N. Schneider, Robert G. Izzard, Selma E. de Mink +7
Massive stars rapidly change their masses through strong stellar winds and mass transfer in binary systems. We show that such mass changes leave characteristic signatures in stella…
iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova Discovered Shortly after Explosion
Evgeny Gorbikov, Avishay Gal-Yam, Eran O. Ofek +13
We present optical photometric and spectroscopic observations of the Type Ibn (SN 2006jc-like) supernova iPTF13beo. Detected by the intermediate Palomar Transient Factory ~3 hours…
Characterizing a Dramatic Flare on an Ultracool Dwarf Found by the ASAS-SN Survey
Sarah J. Schmidt, Jose L. Prieto, K. Z. Stanek +19
We analyze a magnitude flare on the newly identified M8 dwarf SDSS J022116.84+194020.4 (hereafter SDSSJ0221) detected as part of the All-Sky Automated Survey for Superno…