A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy,The Astrophysical Journal Letters

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A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy
The Astrophysical Journal Letters ( IF 7.9 ) Pub Date : 2020-05-25 , DOI: 10.3847/2041-8213/ab8cc7
D. L. Coppejans ₁ , R. Margutti _{1,

2} , G. Terreran ₁ , A. J. Nayana _{3,

4} , E. R. Coughlin ₅ , T. Laskar ₆ , K. D. Alexander ₁ , M. Bietenholz _{7,

8} , D. Caprioli ₉ , P. Chandra ₄ , M. R. Drout _{10,

11} , D. Frederiks ₁₂ , C. Frohmaier ₁₃ , K. H Hurley ₁₄ , C. S. Kochanek _{15,

16} , M. MacLeod ₁₇ , A. Meisner ₁₈ , P. E. Nugent ₁₉ , A. Ridnaia ₁₂ , D. J. Sand ₂₀ , D. Svinkin ₁₂ , C. Ward _{19,

21} , S. Yang _{22,

23,

24} , A. Baldeschi ₁ , I. V. Chilingarian _{17,

25} , Y. Dong ₂₆ , C. Esquivia _{1,

27} , W. Fong ₁ , C. Guidorzi ₂₈ , P. Lundqvist _{29,

30} , D. Milisavljevic ₂₆ , K. Paterson ₁ , D. E. Reichart ₃₁ , B. Shappee ₃₂ , M. C. Stroh ₁ , S. Valenti ₂₂ , B. A. Zauderer _{33,

34} , B. Zhang ₃₅

Affiliation

Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
CIFAR Azrieli Global Scholars program, CIFAR, Toronto, Canada
Department of Physics, United Arab Emirates University, Al-Ain, 15551, UAE
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, P.O. Box 3, Pune, 411007, India
Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA
Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK
Hartebeesthoek Radio Observatory, P.O. Box 443, Krugersdorp, 1740, South Africa
Department of Physics and Astronomy, York University, Toronto, M3J 1P3, Ontario, Canada
Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USA
Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario, M5S 3H4, Canada
The Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USA
Ioffe Institute, Polytekhnicheskaya, 26, St. Petersburg, 194021, Russia
Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UK
University of California at Berkeley, Space Sciences Laboratory, 7 Gauss Way, Berkeley, CA 94720, USA
Center for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Avenue, Columbus, OH 43210, USA
Department of Astronomy Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
Center for Astrophysics—Harvard and Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
NSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N Cherry Ave, Tucson, AZ 85719, USA
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
Department of Astronomy, University of Maryland, College Park, MD 20742, USA
Department of Physics, University of California, 1 Shields Avenue, Davis, CA 95616-5270, USA
INAF Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
Sternberg Astronomical Institute, M. V. Lomonosov Moscow State University, 13 Universitetsky prospect, Moscow, 119234, Russia
Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, USA
Hamilton College, 198 College Hill Road, Clinton, NY 13323, USA
Department of Physics and Earth Science, University of Ferrara, via Saragat 1, I-44122, Ferrara, Italy
Department of Astronomy, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
The Oskar Klein Centre, AlbaNova, SE-10691 Stockholm, Sweden
Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
National Science Foundation, 2415 Eisenhower Ave., Alexandria, VA 22314, USA
Neils Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, USA

We present X-ray and radio observations of the Fast Blue Optical Transient CRTS-CSS161010 J045834−081803 (CSS161010 hereafter) at t = 69–531 days. CSS161010 shows luminous X-ray ( L x ∼ 5 × 10 39 erg s −1 ) and radio ( L ν ∼ 10 29 erg s −1 Hz −1 ) emission. The radio emission peaked at ∼100 days post-transient explosion and rapidly decayed. We interpret these observations in the context of synchrotron emission from an expanding blast wave. CSS161010 launched a mildly relativistic outflow with velocity Γ βc ≥ 0.55 c at ∼100 days. This is faster than the non-relativistic AT 2018cow (Γ βc ∼ 0.1 c ) and closer to ZTF18abvkwla (Γ βc ≥ 0.3 c at 63 days). The inferred initial kinetic energy of CSS161010 ( E k ≳ 10 51 erg) is comparable to that of long gamma-ray bursts, but the ejecta mass that is coupled to the mildly r...

中文翻译：

矮星系中充满活力的，快速上升的蓝色光学瞬态CSS161010的相对论流出

我们在时间= 69-531天时呈现了耐蓝光瞬态CRTS-CSS161010 J045834−081803（以下称CSS161010）的X射线和无线电观察结果。CSS161010显示发光X射线（L x〜5×10 39 erg s -1）和无线电（Lν〜10 29 erg s -1 Hz -1）发射。瞬态爆炸后约100天，无线电发射达到峰值，并迅速衰减。我们在爆炸的爆炸波中同步加速器发射的背景下解释这些观察结果。CSS161010在约100天时启动了一个相对论的流出，速度Γβc≥0.55 c。这比非相对论AT 2018cow（Γβc〜0.1 c）快，并且更接近ZTF18abvkwla（63天时ββc≥0.3 c）。推断的CSS161010的初始动能（E k≳10 51 erg）与长伽马射线爆发的动能相当，但与轻度辐射耦合的喷射质量...

更新日期：2020-05-25

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