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The host galaxy and late-time evolution of the superluminous supernova PTF12dam
Chen, T. -W.1; Smartt, S. J.1; Jerkstrand, A.1; Nicholl, M.1; Bresolin, F.2; Kotak, R.1; Polshaw, J.1; Rest, A.3; Kudritzki, R.2; Zheng, Z.4; Elias-Rosa, N.5,6; Smith, K.1; Inserra, C.1; Wright, D.1; Kankare, E.1,7; Kangas, T.8; Fraser, M.9
AbstractSuperluminous supernovae (SLSNe) of Type Ic have a tendency to occur in faint host galaxies which are likely to have low mass and low metallicity. PTF12dam is one of the closest and best-studied superluminous explosions that has a broad and slowly fading light curve similar to SN 2007bi. Here we present new photometry and spectroscopy for PTF12dam from 200-500 d (rest frame) after peak and a detailed analysis of the host galaxy (SDSS J142446.21+461348.6 at z = 0.107). Using deep templates and image subtraction we show that the light curve can be fit with a magnetar model if escape of high-energy gamma rays is taken into account. The full bolometric light curve from -53 to +399 d (with respect to peak) cannot be fit satisfactorily with the pair-instability models. An alternative model of interaction with a dense circumstellar material (CSM) produces a good fit to the data although this requires a very large mass (similar to 13 M-circle dot) of hydrogen-free CSM. The host galaxy is a compact dwarf (physical size similar to 1.9 kpc) and with M-g=-19.33 +/- 0.10, it is the brightest nearby SLSN Ic host discovered so far. The host is a low-mass system (2.8 x 10(8) M-circle dot) with a star formation rate (5.0 M-circle dot yr(-1)), which implies a very high specific star formation rate (17.9 Gyr(-1)). The remarkably strong nebular emission provide detections of the [O III] lambda 4363 and [O II] lambda lambda 7320, 7330auroral lines and an accurate oxygen abundance of 12 + log (O/H) = 8.05 +/- 0.09. We show here that they are at the extreme end of the metallicity distribution of dwarf galaxies and propose that low metallicity is a requirement to produce these rare and peculiar SNe.
KeywordSupernovae: General Supernovae: Individual: Ptf12dam Galaxies: Abundances Galaxies: Dwarf
Indexed BySCI
WOS IDWOS:000360851900039
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Cited Times:59[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland
2.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
3.Space Telescope Sci Inst, Baltimore, MD 21218 USA
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
5.INAF, Osservatorio Astron Padova, I-35122 Padua, Italy
6.CSIC, IEEC, Inst Ciencies Espai, E-08193 Barcelona, Spain
7.Univ Turku, Finnish Ctr Astron ESO FINCA, FI-21500 Piikkio, Finland
8.Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-21500 Piikkio, Finland
9.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
Recommended Citation
GB/T 7714
Chen, T. -W.,Smartt, S. J.,Jerkstrand, A.,et al. The host galaxy and late-time evolution of the superluminous supernova PTF12dam[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(2):1567-1586.
APA Chen, T. -W..,Smartt, S. J..,Jerkstrand, A..,Nicholl, M..,Bresolin, F..,...&Fraser, M..(2015).The host galaxy and late-time evolution of the superluminous supernova PTF12dam.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(2),1567-1586.
MLA Chen, T. -W.,et al."The host galaxy and late-time evolution of the superluminous supernova PTF12dam".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.2(2015):1567-1586.
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