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arXiv:astro-ph/0011440 (astro-ph)
[Submitted on 23 Nov 2000]

Title:The brightness of SN 1991T and the uniformity of decline-rate and colour corrected absolute magnitudes of supernovae Ia

Authors:T. Richtler (1), J.B. Jensen (2), J. Tonry (3), B. Barris (3), G. Drenkhahn (4) ((1) Universidad de Concepcion, (2) Gemini Observatory, (3) University of Hawaii, (4) Max-Planck-Institut fuer Astrophysik)
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Abstract: We present a distance to NGC 4527, the host galaxy of the type Ia SN 1991T, measured by surface brightness fluctuations. This supernova has been labelled ``peculiar'' both on the grounds of its spectroscopic behaviour and its apparent overluminosity with respect to other supernovae. The distance modulus to NGC 4527 and thus to SN 1991T is 30.26+-0.09. This relatively short distance largely removes the discrepancy with other Ia supernovae having similar light-curve characteristics and also removes the motivation for interpreting SN 1991T as a super-Chandrasekhar explosion. However, the reddening uncertainty results in significant uncertainty of the absolute magnitudes.
Comments: 7 pages, 2 Postscript figures, accepted for publication by Astronomy and Astrophysics
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011440
  (or arXiv:astro-ph/0011440v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011440
Related DOI: https://doi.org/10.1051/0004-6361%3A20000104

Submission history

From: Tom Richtler [view email]
[v1] Thu, 23 Nov 2000 14:47:38 UTC (107 KB)
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