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GALEX spectroscopy of SN 2005ay suggests ultraviolet spectral uniformity among type II-P supernovae

Gal-Yam, A. and Bufano, F. and Barlow, T. A. and Baron, E. and Benetti, S. and Cappellaro, E. and Challis, P. J. and Ellis, R. S. and Filippenko, A. V. and Foley, R. J. and Fox, D. B. and Hicken, M. and Kirshner, R. P. and Leonard, D. C. and Li, W. and Maoz, D. and Matheson, T. and Mazzali, P. A. and Modjaz, M. and Nomoto, K. and Ofek, E. O. and Simon, J. D. and Small, T. A. and Smith, G. P. and Turatto, M. and van Dyk, S. D. and Zampieri, L. (2008) GALEX spectroscopy of SN 2005ay suggests ultraviolet spectral uniformity among type II-P supernovae. Astrophysical Journal, 685 (2). L117-L120. ISSN 0004-637X. doi:10.1086/592744.

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We present the initial results from our GALEX program designed to obtain ultraviolet (UV) spectra of nearby core-collapse supernovae (SNe). Our first target, SN 2005ay in the nearby galaxy NGC 3938, is a typical member of the SN II-P subclass. Our spectra show remarkable similarity to those of the prototypical Type II-P SN 1999em, and resemble also Swift observations of the recent Type II-P SN 2005cs. Taken together, the observations of these three events trace the UV spectral evolution of SNe II-P during the first month after explosion, as required in order to interpret optical observations of high-redshift SNe II-P, and to derive cross-filter K-corrections. While still highly preliminary, the apparent UV homogeneity of SNe II-P bodes well for the use of these events as cosmological probes at high redshift.

Item Type:Article
Related URLs:
URLURL TypeDescription
Gal-Yam, A.0000-0002-3653-5598
Benetti, S.0000-0002-3256-0016
Cappellaro, E.0000-0001-5008-8619
Ellis, R. S.0000-0001-7782-7071
Filippenko, A. V.0000-0003-3460-0103
Fox, D. B.0000-0002-3714-672X
Kirshner, R. P.0000-0002-1966-3942
Matheson, T.0000-0001-6685-0479
Mazzali, P. A.0000-0001-6876-8284
Modjaz, M.0000-0001-7132-0333
Nomoto, K.0000-0001-9553-0685
Ofek, E. O.0000-0002-6786-8774
Smith, G. P.0000-0003-4494-8277
van Dyk, S. D.0000-0001-9038-9950
Additional Information:© 2008 The American Astronomical Society. Received 2008 June 24; accepted 2008 August 21; published 2008 September 16. Based on observations made with the NASA Galaxy Evolution Explorer, GALEX, which is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. We further acknowledge financial support from NASA through the GALEX guest investigator program (projects GALEX-GI-44, cycle 1; GALEX-GI-67, cycle 3; and GALEX-GI-20, cycle 4).We are indebted to the GALEX Science Operations Center (SOC), and in particular to K. Forster, for making this ToO program possible. We thank D. Poznanski for comments on the manuscript, and the referee, V. Utrobin, for useful suggestions. We gratefully acknowledge the SUSPECT supernova spectra database maintained by the University of Oklahoma. A. G. acknowledges support by the Benoziyo Center for Astrophysics, a research grant from Peter and Patricia Gruber Awards, and the William Z. and Eda Bess Novick New Scientists Fund at the Weizmann Institute. A. V. F.’s group is partially funded by NSF grant AST 06-07485 and the TABASGO Foundation. S. B., E. C., and M. T. are supported by the Italian Ministry of Education via the PRIN 2006 n.2006022731 002.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NSFAST 06-07485
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)PRIN 2006 n.2006022731 002
Benoziyo Center for AstrophysicsUNSPECIFIED
Peter and Patricia Gruber AwardsUNSPECIFIED
William Z. and Eda Bess Novick New Scientists Fund at the Weizmann InstituteUNSPECIFIED
Subject Keywords:supernovae: individual (SN 2005ay); ultraviolet: general
Issue or Number:2
Record Number:CaltechAUTHORS:20090408-095231425
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13891
Deposited By: Tony Diaz
Deposited On:17 Apr 2009 22:38
Last Modified:08 Nov 2021 22:41

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