论文信息 - Spectral Identification of an Ancient Supernova Using Light Echoes in the Large Magellanic Cloud - 字舞流文

Spectral Identification of an Ancient Supernova Using Light Echoes in the Large Magellanic Cloud

We report the successful identification of the type of the supernova responsible for the supernova remnant SNR 0509-675 in the Large Magellanic Cloud (LMC) using Gemini spectra of surrounding light echoes. The ability to classify outbursts associated with centuries-old remnants provides a new window into several aspects of supernova research and is likely to be successful in providing new constraints on additional LMC supernovae as well as their historical counterparts in the Milky Way Galaxy (MWG). The combined spectrum of echo light from SNR 0509-675 shows broad emission and absorption lines consistent with a supernova (SN) spectrum. We create a spectral library consisting of 26 SNe Ia and 6 SN Ib/c that are time-integrated, dust-scattered by LMC dust, and reddened by the LMC and MWG. We fit these SN templates to the observed light echo spectrum using � 2 minimization as well as correlation techniques, and we find that overluminous 91T-like SNe Ia with �m15 < 0.9 match the observed spectrum best. Subject headings: ISM: individual(SNR 0509-67.5) — supernova:general — supernova remnants — Magellanic Clouds

N. B. Suntzeff | A. Rest | A. C. Becker | A. Miceli | C. Stubbs | T. Matheson | A. Clocchiatti | R. C. Smith | W. M. Wood-Vasey | M. Modjaz | R. J. Foley | D. Minniti | G. Damke | A. Garg | J. L. Prieto | G. Pignata | J. Prieto | W. Wood-Vasey | R. Smith | C. Stubbs | A. Rest | R. Foley | M. Huber | K. Olsen | K. Cook | T. Matheson | A. Zenteno | S. Blondin | M. Modjaz | P. Challis | N. Suntzeff | A. Becker | A. Clocchiatti | M. Hicken | R. Covarrubias | G. Pignata | D. Minniti | D. Welch | L. Morelli | A. Garg | A. Miceli | G. Damke | S. Nikolaev | M. Bergmann | K. H. Cook | A. Zenteno | D. L. Welch | S. Blondin | P. Challis | R. Covarrubias | M. Hicken | L. Morelli | K. Olsen | M. Bergmann | A. Newman | M. Huber | A. Newman | S. Nikolaev | A. Becker | R. Smith

[1] A search for candidate light echoes: Photometry of supernova environments , 1999, astro-ph/9906206.

[2] M. Barlow,et al. AN EXTREMELY BRIGHT ECHO ASSOCIATED WITH SN 2002hh , 2007 .

[3] Armin Rest,et al. Light echoes from ancient supernovae in the Large Magellanic Cloud , 2005, Nature.

[4] Thomas Matheson,et al. The Type Ic Supernova 1994I in M51: Detection of Helium and Spectral Evolution , 1995 .

[5] Reflections on reflexions – II. Effects of light echoes on the luminosity and spectra of Type Ia supernovae , 2005, astro-ph/0512574.

[6] Armin Rest,et al. Light Curves of Type Ia Supernovae from Near the Time of Explosion , 2006 .

[7] J. Bregman,et al. A Scattered Light Echo around SN 1993J in M81 , 2002, astro-ph/0206070.

[8] The Light Echo around Supernova 2003gd in Messier 74 , 2005, astro-ph/0508684.

[9] SN 1991T: Reflections of past glory , 1994, astro-ph/9407097.

[10] M. Wolff,et al. A Quantitative Comparison of the Small Magellanic Cloud, Large Magellanic Cloud, and Milky Way Ultraviolet to Near-Infrared Extinction Curves , 2003 .

[11] U. Munari,et al. An energetic stellar outburst accompanied by circumstellar light echoes , 2003, Nature.

[12] J. Weingartner,et al. Dust Grain-Size Distributions and Extinction in the Milky Way, Large Magellanic Cloud, and Small Magellanic Cloud , 2001 .

[13] J. Tonry,et al. Determining the Type, Redshift, and Age of a Supernova Spectrum , 2006, astro-ph/0612512.

[14] J. Weingartner,et al. Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC , 2000, astro-ph/0008146.

[15] Nicholas B. Suntzeff,et al. SOUTHERN SPECTROPHOTOMETRIC STANDARDS. I. , 1992 .

[16] Geoffrey C. Clayton,et al. A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves , 2003, astro-ph/0305257.

[17] R. Chevalier,et al. Circumstellar infrared and scattered light echoes from SN 1987A , 1989 .

[18] R. Wade,et al. The Radial Velocity Curve and Peculiar TiO Distribution of the Red Secondary Star in Z Chamaeleontis , 1988 .

[19] J. Thorstensen,et al. The Peculiar Type Ic Supernova 1997ef: Another Hypernova , 2000 .

[20] B. Draine,et al. Infrared Emission from Interstellar Dust Ii. the Diffuse Interstellar Medium , 2000 .

[21] J. C. Kapteyn. Ueber die Bewegung der Nebel in der Umgebung von Nova Persei , 1901 .

[22] F. Patat. Reflections on reflexions — I. Light echoes in Type Ia supernovae , 2005 .

[23] F. A. Seiler,et al. Numerical Recipes in C: The Art of Scientific Computing , 1989 .

[24] H. M. Lee,et al. Optical properties of interstellar graphite and silicate grains , 1984 .

[25] Multiple Light Echoes from SN 1993J , 2002, astro-ph/0207497.

[26] R. Kirshner,et al. Analysis of the photospheric epoch spectra of type 1a supernovae SN 1990N and SN 1991T , 1992 .

[27] G. W. Ritchey. Nebulosity about Nova Persei. , 1901 .

[28] William H. Press,et al. The Art of Scientific Computing Second Edition , 1998 .

[29] J. Mathis,et al. The relationship between infrared, optical, and ultraviolet extinction , 1989 .

[30] A light echo from type Ia SN 1995e , 2006, astro-ph/0610431.

[31] William H. Press,et al. Numerical recipes in C (2nd ed.): the art of scientific computing , 1992 .

[32] A. Pastorello,et al. SN 2004aw: confirming diversity of Type Ic supernovae , 2006 .

[33] P. Nugent,et al. High-Redshift Supernovae in the Hubble Deep Field , 1999, astro-ph/9903229.

[34] M. Bessell. Spectrophotometry: Revised Standards and Techniques , 1999 .

[35] S. Jha,et al. The Luminosity of SN 1999by in NGC 2841 and the Nature of “Peculiar” Type Ia Supernovae , 2001, astro-ph/0105490.

[36] R. Chevalier. The scattered light echo of a supernova , 1986 .

[37] A. Rest,et al. A Method for Extracting Light Echo Fluxes Using the NN2 Difference Imaging Technique , 2006, astro-ph/0610579.

[38] A New Method to Calibrate the Magnitudes of Type Ia Supernovae at Maximum Light , 2006, astro-ph/0603407.

[39] B. Schaefer. Light echoes - Novae , 1988 .

[40] K. Glazebrook,et al. Microslit Nod‐Shuffle Spectroscopy: A Technique for Achieving Very High Densities of Spectra , 2000, astro-ph/0011104.

[41] K. Chambers,et al. The light echoes from SN1987A , 1988, Nature.

[42] R. Kirshner,et al. ASCA observations of the Large Magellanic Cloud supernova remnant sample: Typing supernovae from their remnants , 1995 .

[43] L. C. Henyey,et al. Diffuse radiation in the Galaxy , 1940 .

[44] Ben E. K. Sugerman. OBSERVABILITY OF SCATTERED-LIGHT ECHOES AROUND VARIABLE STARS AND CATACLYSMIC EVENTS , 2003 .

[45] Detailed analysis of early to late-time spectra of supernova 1993j , 2000, astro-ph/0006264.

[46] G. W. Ritchey. Nebulosity about Nova Persei. Recent photographs. , 1902 .

[47] et al,et al. UBVRI Light Curves of 44 Type Ia Supernovae , 2005 .

[48] D. Zaritsky. Dust and Stellar Populations in the Large Magellanic Cloud , 1999, astro-ph/9908363.

[49] Ari Laor,et al. Spectroscopic constraints on the properties of dust in active galactic nuclei , 1993 .

[50] G. Graves,et al. OPTICAL SPECTROSCOPY OF TYPE Ia SUPERNOVAE , 2008, The Astronomical Journal.

[51] M. L. Hazen,et al. Evolution of the Light Echo of SN 1991T , 1999 .

[52] J. Tonry,et al. A survey of galaxy redshifts. I. Data reduction techniques. , 1979 .

[53] Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey , 2005, astro-ph/0509240.

[54] N. B. Suntzeff,et al. The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry , 2007, astro-ph/0701043.