Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp

doi:10.3847/1538-4357/ab1a3f

	Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp
	Brown, Peter J.1,2; Hosseinzadeh, Griffin 3; Jha, Saurabh W.4; Sand, David 5; Vieira, Ethan 6; Wang, Xiaofeng 7; Dai, Mi 4; Dettman, Kyle G.4; Mould, Jeremy 8,9; Uddin, Syed 10
刊名	ASTROPHYSICAL JOURNAL
	2019-06-01
卷号	877 期号:2 页码:13
关键词	dust, extinction supernovae: general supernovae: individual (SN2017erp, SN2011fe, SN2011by)
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab1a3f
通讯作者	Brown, Peter J.(pbrown@physics.tamu.edu)
英文摘要	We present space-based ultraviolet/optical photometry and spectroscopy with the Swift Ultra-Violet/Optical Telescope and Hubble Space Telescope (HST), respectively, along with ground-based optical photometry and spectroscopy and near-infrared spectroscopy of supernova SN 2017erp. The optical light curves and spectra are consistent with a normal SN Ia. Compared to previous photometric samples in the near-ultraviolet (NUV), SN 2017erp has UV colors that are redder than NUV-blue SNe Ia corrected to similar optical colors. The chromatic difference between SNe 2011fe and 2017erp is dominated by the intrinsic differences in the UV rather than the expected dust reddening. This chromatic difference is similar to the SALT2 color law, derived from rest-frame ultraviolet photometry of higher redshift SNe Ia. Differentiating between intrinsic UV diversity and dust reddening can have important consequences for determining cosmological distances with rest-frame ultraviolet photometry. This ultraviolet spectroscopic series is the first from HST of a normal, albeit reddened, NUV-red SN Ia and is important for analyzing SNe Ia with intrinsically redder NUV colors. We show model comparisons suggesting that metallicity could be the physical difference between NUV-blue and NUV-red SNe Ia, with emission peaks from reverse fluorescence near 3000 angstrom implying a factor of similar to 10 higher metallicity in the upper layers of SN 2017erp compared to SN 2011fe. Metallicity estimates are very model dependent, however, and there are multiple effects in the UV. Further models and UV spectra of SNe Ia are needed to explore the diversity of SNe Ia, which show seemingly independent differences in the near-UV peaks and mid-UV flux levels.
WOS关键词	HUBBLE-SPACE-TELESCOPE ; 2-PARAMETER LUMINOSITY CORRECTION ; ABSOLUTE MAGNITUDES ; IMPROVED DISTANCES ; ESC OBSERVATIONS ; SN 2005CF ; SPECTRA ; EVOLUTION ; MODELS ; NUCLEOSYNTHESIS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000470807700013
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/26993]
专题	中国科学院紫金山天文台
通讯作者	Brown, Peter J.
作者单位	1.Texas A&M Univ, Dept Phys & Astron, 4242 TAMU, College Stn, TX 77843 USA 2.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA 3.Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA 4.Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA 5.Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA 6.Texas A&M Univ, Dept Aerosp Engn, 4242 TAMU, College Stn, TX 77843 USA 7.Tsinghua Univ, Tsinghua Ctr Astrophys, Phys Dept, Beijing 100084, Peoples R China 8.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia 9.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Melbourne, Vic, Australia 10.Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA
推荐引用方式 GB/T 7714	Brown, Peter J.,Hosseinzadeh, Griffin,Jha, Saurabh W.,et al. Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp[J]. ASTROPHYSICAL JOURNAL,2019,877(2):13.
APA	Brown, Peter J..,Hosseinzadeh, Griffin.,Jha, Saurabh W..,Sand, David.,Vieira, Ethan.,...&Xiang, Danfeng.(2019).Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp.ASTROPHYSICAL JOURNAL,877(2),13.
MLA	Brown, Peter J.,et al."Red and Reddened: Ultraviolet through Near-infrared Observations of Type Ia Supernova 2017erp".ASTROPHYSICAL JOURNAL 877.2(2019):13.