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题名: SWIFT ULTRAVIOLET OBSERVATIONS OF SUPERNOVA 2014J IN M82: LARGE EXTINCTION FROM INTERSTELLAR DUST
作者: Brown, Peter J.1; Smitka, Michael T.1; Wang LiFan(王力帆)1, 2; Breeveld, Alice3; de Pasquale, Massimiliano4; Hartmann, Dieter H.5; Krisciunas, Kevin1; Kuin, N. Paul3; Milne, Peter A.6; Page, Mat3; Siegel, Michael7
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-05-20
卷号: 805, 期号:1, 页码:74
关键词: dust, extinction ; supernovae: general ; supernovae: individual (SN2014J, SN2011fe, SN2012fr)
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/805/1/74
文章类型: Article
英文摘要: We present optical and ultraviolet (UV) photometry and spectra of the very nearby and highly reddened supernova (SN) 2014J in M82 obtained with the Swift Ultra-Violet/Optical Telescope (UVOT). Comparison of the UVOT grism spectra of SN 2014J with Hubble Space Telescope observations of SN2011fe or UVOT grism spectra of SN 2012fr are consistent with an extinction law with a low value of R-V similar to 1.4. The high reddening causes the detected photon distribution in the broadband UV filters to have a much longer effective wavelength than for an unreddened SN. The light curve evolution is consistent with this shift and does not show a flattening due to photons being scattered back into the line of sight (LOS). The light curve shapes and color evolution are inconsistent with a contribution scattered into the LOS by circumstellar dust. We conclude that most or all of the high reddening must come from interstellar dust. We show that even for a single dust composition, there is not a unique reddening law caused by circumstellar scattering. Rather, when considering scattering from a time-variable source, we confirm earlier studies that the reddening law is a function of the dust geometry, column density, and epoch. We also show how an assumed geometry of dust as a foreground sheet in mixed stellar/dust systems will lead to a higher inferred RV. Rather than assuming the dust around SNe is peculiar, SNe may be useful probes of the interstellar reddening laws in other galaxies.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: HUBBLE-SPACE-TELESCOPE ; SMALL-MAGELLANIC-CLOUD ; IA LIGHT CURVES ; SN 2014J ; ABSOLUTE MAGNITUDES ; CIRCUMSTELLAR DUST ; DECLINE RATE ; TIME-SERIES ; GALAXY M82 ; MILKY-WAY
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000354991300074
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14884
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia Woods Mitchell Inst Fundamenta, TAMU 4242, College Stn, TX 77843 USA
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England
4.Inst Astrophys Spatiale & Fis Cosm Palermo, I-90146 Palermo, Italy
5.Clemson Univ, Dept Phys & Astron, Kinard Lab Phys, Clemson, SC 29634 USA
6.Univ Arizona, Steward Observ, Tucson, AZ 85719 USA
7.Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA
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