A High-Resolution Spectroscopic Search For The Remaining Donor For Tycho's Supernova

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Date

2013-09

Authors

Kerzendorf, Wolfgang E.
Yong, David
Schmidt, Brian P.
Simon, Joshua D.
Jeffery, C. Simon
Anderson, Jay
Podsiadlowski, Phillipp
Gal-Yam, Avishay
Silverman, Jeffrey M.
Filippenko, Alexei V.

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Abstract

In this paper, we report on our analysis using Hubble Space Telescope astrometry and Keck-I HIRES spectroscopy of the central six stars of Tycho's supernova remnant (SN 1572). With these data, we measured the proper motions, radial velocities, rotational velocities, and chemical abundances of these objects. Regarding the chemical abundances, we do not confirm the unusually high [Ni/Fe] ratio previously reported for Tycho-G. Rather, we find that for all metrics in all stars, none exhibit the characteristics expected from traditional Type Ia supernova single-degenerate-scenario calculations. The only possible exception is Tycho-B, a rare, metal-poor A-type star; however, we are unable to find a suitable scenario for it. Thus, we suggest that SN 1572 cannot be explained by the standard single-degenerate model.

Department

Astronomy

Description

Keywords

ism: supernova remnants, supernovae: individual (sn1572), diffuse interstellar bands, relative oscillator-strengths, fe-i, transitions, single-degenerate scenario, brahes 1572 supernova, x-ray, observations, mass white-dwarfs, red giant branch, sn 2011fe, precision-measurement, astronomy & astrophysics

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Citation

Kerzendorf, Wolfgang E., David Yong, Brian P. Schmidt, Joshua D. Simon, C. Simon Jeffery, Jay Anderson, Philipp Podsiadlowski et al. "A high-resolution spectroscopic search for the remaining donor for Tycho's supernova." The Astrophysical Journal, Vol. 774, No. 2 (Sep., 2013): 99.

URI

http://hdl.handle.net/2152/34947

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