A light echo from Type Ia SN 1995E?

被引：27

作者：

Quinn, Jason L. ^{[1
]}

Garnavich, Peter M.

Li, Weidong

Panagia, Nino

Riess, Adam

Schmidt, Brian P.

Della Valle, Massimo

机构：

[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 45556 USA

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[3] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[4] Mt Stromlo & Siding Spring Observ, Canberra, ACT 2601, Australia

[5] Osserv Astrofis Arcetri, I-50125 Florence, Italy

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 652卷 / 01期

关键词：

supernovae; individual; (SN; 1995E; NGC; 2441);

D O I：

10.1086/507826

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We identify a light echo candidate from Hubble Space Telescope (HST) imaging of NGC 2441, the host galaxy of the Type Ia supernova 1995E. From the echo's angular size and the estimated distance to the host galaxy, we find a distance of 207 +/- 35 pc between the dust and the site of the supernova. If confirmed, this echo brings the total number of observed nonhistorical Type Ia light echoes to three-the others being SN 1991Tand SN 1998bu-suggesting that they are not uncommon. We compare the properties of the known Type Ia supernova echoes and test models of light echoes developed by Patat and coworkers. HST photometry of the SN 1991Techo shows a fading, which is consistent with scattering by dust distributed in a sphere or shell around the supernova. Light echoes have the potential to answer questions about the progenitors of Type Ia supernovae, and more effort should be made for their detection, given the importance of Type Ia supernovae to measurements of dark energy.

引用

页码：512 / 517

页数：6

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