A WFPC2 Search for Surviving Binary Companions in SN Ia Remnants

Details A WFPC2 Search for Surviving Binary Companions in SN Ia Remnants A WFPC2 Search for Surviving Binary Companions in SN Ia Remnants

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6435f&link_type=abstract

HST Proposal ID #6435

Physics

Nuclear Physics

Hst Proposal Id #6435 Interstellar Medium

Scientific paper

Type Ia supernovae {SNe Ia} are widely believed to be explosions of white dwarfs undergoing binary mass accretion. Determining the type of interacting binary system leading to SNe Ia is an important yet unsolved astrophysical problem, encompassing binary star evolution, mass accretion rates, and thermonuclear physics. Identifying the correct binary model{s} for SNe Ia is unlikely to be accomplished by theory alone, and extragalactic SNe observations can provide only limited model constraints. Because 2-D hydrodynamic studies indicate that symbiotic and cataclysmic SN binaries should leave surviving companion stars, we propose a more direct approach: a deep search for surviving SN Ia companions. , , We will use the WFPC2 to identify SN Ia surviving companions or set strong empirical limits on post-SN kinematic and luminosity properties of surviving companions, in order to determine likely SN Ia progenitor systems. UVBRI images would be taken of two galactic SN Ia remnants, Tycho's SNR {SN 1572} & SN 1006. The stellar population near the geometric centers of each {search radii: Tycho = 15''; SN 1006 = 40''} will be examined to M_ V = +12 {Tycho} and +14.7 {SN 1006} via 10 to 30 minute WF camera images. Relative astrometry from Cycle 7 & 8 images will identify high proper motions survivor candidates {v_ transverse >= 150 km s^-1} compatible with the remnant's age and expansion center location.

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