Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 391, Issue 1, Pages L5-L9Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2008.00540.x
Keywords
supernovae: individual: SN 2008ax; galaxies: individual: NGC 4490
Categories
Funding
- EURYI and ESF
- NSF/NASA [AST-0406740/NNG04GL00]
- Academy of Finland [8120503]
- Benoziyo Center for Astrophysics
- Eda Bess Novick New Scientists Fund at the Weizmann Institute of Science
- STFC [ST/G000921/1, PP/C506805/1, PP/D508212/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D508212/1, ST/G000921/1, PP/C506805/1] Funding Source: researchfish
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A source coincident with the position of the type IIb supernova (SN) 2008ax is identified in pre-explosion Hubble Space Telescope (HST) Wide Field Planetary Camera 2 observations in three optical filters. We identify and constrain two possible progenitor systems: (i) a single massive star that lost most of its hydrogen envelope through radiatively driven mass-loss processes, prior to exploding as a helium-rich Wolf-Rayet star with a residual hydrogen envelope, and (ii) an interacting binary in a low-mass cluster producing a stripped progenitor. Late time, high-resolution observations along with detailed modelling of the SN will be required to reveal the true nature of this progenitor star.
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