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Upper limit for circumstellar gas around the type Ia SN 2000cx

Patat, F. and Benetti, S. and Justham, S. and Mazzali, P. A. and Pasquini, L. and Cappellaro, E. and Della Valle, M. and Podsiadlowski, Ph. and Turatto, M. and Gal-Yam, A. and Simon, J. D. (2007) Upper limit for circumstellar gas around the type Ia SN 2000cx. Astronomy and Astrophysics, 474 (3). pp. 931-936. ISSN 0004-6361.

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Context. The nature of the companion stars in type Ia Supernova (SNe) progenitor systems remains unclear. One possible way to discriminate between different scenarios is the presence (or absence) of circumstellar material, the left overs from the progenitor evolution that may be revealed by their interaction with the SN. Aims. A new method to probe the circumstellar environment has been exploited for the normal type Ia SN 2006X, leading for the first time to the direct detection of material which escaped the progenitor system. In this paper we apply the same analysis to the peculiar type Ia SN 2000cx, with the aim of constraining the properties of its progenitor system. Methods. Using multi-epoch, high-resolution spectroscopy we have studied the spectral region where narrow, time-variable Na ID absorption features are expected in case circumstellar material is present along the line of sight. Results. No Na ID absorption is detected in the rest-frame of the host galaxy to a level of a few mÅ, setting a stringent upper limit to the column density of the absorbing material (N(NaI) 2 ≤ 10^(10) cm^(-2)). Conclusions. In this respect the peculiar type Ia SN 2000cx is different from the normal Ia SN 2006X. Whether this is to be attributed to a different progenitor system, to viewing-angle effects or to a low metallicity remains to be clarified.

Item Type:Article
Related URLs:
URLURL TypeDescription
Patat, F.0000-0002-0537-3573
Benetti, S.0000-0002-3256-0016
Mazzali, P. A.0000-0001-6876-8284
Cappellaro, E.0000-0001-5008-8619
Della Valle, M.0000-0003-3142-5020
Gal-Yam, A.0000-0002-3653-5598
Additional Information:© ESO 2007. Received 1 August 2007. Accepted 27 August 2007. This paper is based on observations made with ESO Telescopes at Paranal Observatory under program IDs 65.H-0426 (P.I.P. Lundqvist) and 65.H-0468 (P.I.M. Della Valle). The authors are indebted to J. Liske, for his kind help during the usage of the VPGUESS package, and to H. Kuntscher and M. Norris for providing them with the metallicity and kinematic data for NGC 524.
Subject Keywords:stars : supernovae : general; stars : supernovae : individual : SN2000cx; ISM : general; galaxies : individual : NGC 524
Issue or Number:3
Record Number:CaltechAUTHORS:20091118-110553175
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Official Citation:Upper limit for circumstellar gas around the type Ia SN 2000cx F. Patat, S. Benetti, S. Justham, P. A. Mazzali, L. Pasquini, E. Cappellaro, M. Della Valle, Ph.Podsiadlowski, M. Turatto, A. Gal-Yam and J. D. Simon A&A 474 (3) 931-936 (2007) DOI: 10.1051/0004-6361:20078393
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16746
Deposited By: Tony Diaz
Deposited On:13 Dec 2009 02:11
Last Modified:14 Dec 2019 00:11

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