Pan-STARRS1 DISCOVERY OF TWO ULTRALUMINOUS SUPERNOVAE ATz ≈ 0.9

被引：174

作者：

Chomiuk, L. ^{[1
,2
]}

Chornock, R. ^{[2
]}

Soderberg, A. M. ^{[2
]}

Berger, E. ^{[2
]}

Chevalier, R. A. ^{[3
]}

Foley, R. J. ^{[2
]}

Huber, M. E. ^{[4
]}

Narayan, G. ^{[5
]}

Rest, A. ^{[6
]}

Gezari, S. ^{[4
]}

Kirshner, R. P. ^{[2
]}

Riess, A. ^{[4
]}

Rodney, S. A. ^{[4
]}

Smartt, S. J. ^{[7
]}

Stubbs, C. W. ^{[5
]}

Tonry, J. L. ^{[8
]}

Wood-Vasey, W. M. ^{[9
]}

Burgett, W. S. ^{[8
]}

Chambers, K. C. ^{[8
]}

Czekala, I. ^{[2
]}

Flewelling, H. ^{[8
]}

Forster, K. ^{[10
]}

Kaiser, N. ^{[8
]}

Kudritzki, R. -P. ^{[8
]}

Magnier, E. A. ^{[8
]}

Martin, D. C. ^{[10
]}

Morgan, J. S. ^{[8
]}

Neill, J. D. ^{[10
]}

Price, P. A. ^{[11
]}

Roth, K. C. ^{[12
]}

Sanders, N. E. ^{[2
]}

Wainscoat, R. J. ^{[8
]}

机构：

[1] Natl Radio Astron Observ, Socorro, NM 87801 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA

[4] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[5] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

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

[7] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland

[8] Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA

[9] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[10] CALTECH, Pasadena, CA 91125 USA

[11] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[12] Gemini Observ, Hilo, HI 96720 USA

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 743卷 / 02期

基金：

美国国家科学基金会;

关键词：

circumstellar matter; stars: magnetars; supernovae: general; supernovae:; individual; (PS1-10ky; PS1-10awh); GAMMA-RAY BURSTS; MASS-METALLICITY RELATION; SHOCK BREAKOUT; CORE-COLLAPSE; LIGHT CURVES; CIRCUMSTELLAR INTERACTION; LUMINOUS SUPERNOVA; PAIR-INSTABILITY; RADIO-EMISSION; ORIGIN;

D O I：

10.1088/0004-637X/743/2/114

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of two ultraluminous supernovae (SNe) at z approximate to 0.9 with the Pan-STARRS1 Medium Deep Survey. These SNe, PS1-10ky and PS1-10awh, are among the most luminous SNe ever discovered, comparable to the unusual transients SN 2005ap and SCP 06F6. Like SN 2005ap and SCP 06F6, they show characteristic high luminosities (M-bol approximate to -22.5 mag), blue spectra with a few broad absorption lines, and no evidence for H or He. We have constructed a full multi-color light curve sensitive to the peak of the spectral energy distribution in the rest-frame ultraviolet, and we have obtained time series spectroscopy for these SNe. Given the similarities between the SNe, we combine their light curves to estimate a total radiated energy over the course of explosion of (0.9-1.4) x 10(51) erg. We find photospheric velocities of 12,000-19,000 km s(-1) with no evidence for deceleration measured across similar to 3 rest-frame weeks around light curve peak, consistent with the expansion of an optically thick massive shell of material. We show that, consistent with findings for other ultraluminous SNe in this class, radioactive decay is not sufficient to power PS1-10ky, and we discuss two plausible origins for these events: the initial spin-down of a newborn magnetar in a core-collapse SN, or SN shock breakout from the dense circumstellar wind surrounding a Wolf-Rayet star.

引用

页数：19

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