The 2175 angstrom Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z =. 2.25
文献类型：期刊论文
| 作者 | Zafar, T.2; Heintz, K. E.3,4; Fynbo, J. P. U.4; Malesani, D.5; Bolmer, J.6; Ledoux, C.6; Arabsalmani, M.7; Kaper, L.8; Campana, S.9; Starling, R. L. C.10 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2018-06-20 |
| 卷号 | 860期号:2页码:7 |
| ISSN号 | 2041-8205 |
| 关键词 | dust, extinction galaxies: ISM gamma-ray burst: general gamma-ray burst: individual (GRB 180325A) |
| DOI | 10.3847/2041-8213/aaca3f |
| 英文摘要 | The ultraviolet (UV) extinction feature at 2175 angstrom is ubiquitously observed in the Galaxy but is rarely detected at high redshifts. Here we report the spectroscopic detection of the 2175 angstrom bump on the sightline to the gamma-ray burst (GRB) afterglow GRB 180325A at z. =. 2.2486, the only unambiguous detection over the past 10 years of GRB follow-up, at four different epochs with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT)/X-shooter. Additional photometric observations of the afterglow are obtained with the Gamma-Ray burst Optical and Near-Infrared Detector (GROND). We construct the near-infrared to X-ray spectral energy distributions (SEDs) at four spectroscopic epochs. The SEDs are well described by a single power law and an extinction law with R-V approximate to 4.4, A(V) approximate to 1.5, and the 2175 angstrom extinction feature. The bump strength and extinction curve are shallower than the average Galactic extinction curve. We determine a metallicity of [Zn/H] > -0.98 from the VLT/X-shooter spectrum. We detect strong neutral carbon associated with the GRB with equivalent width of W-r(lambda 1656). = 0.85. +/- 0.05. We also detect optical emission lines from the host galaxy. Based on the H alpha emission-line flux, the derived dust-corrected star formation rate is similar to 46. +/-. 4 M-circle dot yr(-1) and the predicted stellar mass is log M-*/M-circle dot similar to 9.3. +/-. 0.4, suggesting that the host galaxy is among the main-sequence star-forming galaxies. |
| WOS关键词 | SMALL-MAGELLANIC-CLOUD ; RAY BURST AFTERGLOW ; INTERSTELLAR EXTINCTION ; ULTRAVIOLET EXTINCTION ; HOST GALAXY ; DUST ; CURVES ; SHAPES ; BANDS ; BUMP |
| 资助项目 | European Organisation for Astronomical Research in the Southern Hemisphere under ESO program[0100.D-0649(A)] ; Spanish research project[AYA 2014-58381-P] ; Juan de la Cierva Incorporacion fellowship[IJCI-2015-26153] ; STFC ; The Icelandic Research Fund[162948-051] ; DNRF ; ASI[I/004/11/3] ; Ramon y Cajal fellowship[RyC-2012-09975] ; [DFF-4090-00079] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000435631800005 |
| 资助机构 | European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; Spanish research project ; Spanish research project ; Juan de la Cierva Incorporacion fellowship ; Juan de la Cierva Incorporacion fellowship ; STFC ; STFC ; The Icelandic Research Fund ; The Icelandic Research Fund ; DNRF ; DNRF ; ASI ; ASI ; Ramon y Cajal fellowship ; Ramon y Cajal fellowship ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; Spanish research project ; Spanish research project ; Juan de la Cierva Incorporacion fellowship ; Juan de la Cierva Incorporacion fellowship ; STFC ; STFC ; The Icelandic Research Fund ; The Icelandic Research Fund ; DNRF ; DNRF ; ASI ; ASI ; Ramon y Cajal fellowship ; Ramon y Cajal fellowship ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; Spanish research project ; Spanish research project ; Juan de la Cierva Incorporacion fellowship ; Juan de la Cierva Incorporacion fellowship ; STFC ; STFC ; The Icelandic Research Fund ; The Icelandic Research Fund ; DNRF ; DNRF ; ASI ; ASI ; Ramon y Cajal fellowship ; Ramon y Cajal fellowship ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; European Organisation for Astronomical Research in the Southern Hemisphere under ESO program ; Spanish research project ; Spanish research project ; Juan de la Cierva Incorporacion fellowship ; Juan de la Cierva Incorporacion fellowship ; STFC ; STFC ; The Icelandic Research Fund ; The Icelandic Research Fund ; DNRF ; DNRF ; ASI ; ASI ; Ramon y Cajal fellowship ; Ramon y Cajal fellowship |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/21809]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zafar, T. |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia 3.Univ Iceland, Ctr Astrophys & Cosmol, Sci Inst, Dunhagi 5, IS-107 Reykjavik, Iceland 4.Univ Copenhagen, Cosm Dawn Ctr, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark 5.Univ Copenhagen, Dark Cosmol Ctr, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark 6.European Southern Observ, Alonso Cordova 3107, Casilla 19001, Santiago De Chi, Spain 7.Univ Paris Diderot, Sorbonne Paris Cite, CNRS, AIM,CEA, F-91191 Gif Sur Yvette, France 8.Univ Amsterdam, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands 9.INAF, Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, LC, Italy 10.Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England |
| 推荐引用方式 GB/T 7714 | Zafar, T.,Heintz, K. E.,Fynbo, J. P. U.,et al. The 2175 angstrom Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z =. 2.25[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,860(2):7. |
| APA | Zafar, T..,Heintz, K. E..,Fynbo, J. P. U..,Malesani, D..,Bolmer, J..,...&Xu, D..(2018).The 2175 angstrom Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z =. 2.25.ASTROPHYSICAL JOURNAL LETTERS,860(2),7. |
| MLA | Zafar, T.,et al."The 2175 angstrom Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z =. 2.25".ASTROPHYSICAL JOURNAL LETTERS 860.2(2018):7. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。