ASASSN-15oi: a rapidly evolving, luminous tidal disruption event at 216 Mpc

被引：148

作者：

Holoien, T. W. -S. ^{[1
,2
]}

Kochanek, C. S. ^{[1
,2
]}

Prieto, J. L. ^{[3
,4
]}

Grupe, D. ^{[5
]}

Chen, Ping ^{[6
]}

Godoy-Rivera, D. ^{[1
]}

Stanek, K. Z. ^{[1
,2
]}

Shappee, B. J. ^{[7
]}

Dong, Subo ^{[8
]}

Brown, J. S. ^{[1
]}

Basu, U. ^{[1
,9
]}

Beacom, J. F. ^{[1
,2
,10
]}

Bersier, D. ^{[11
]}

Brimacombe, J. ^{[12
]}

Carlson, E. K. ^{[7
]}

Falco, E. ^{[13
]}

Johnston, E. ^{[13
]}

Madore, B. F. ^{[7
]}

Pojmanski, G. ^{[14
]}

Seibert, M. ^{[7
]}

机构：

[1] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA

[2] Ohio State Univ, CCAPP, 191 W Woodruff Ave, Columbus, OH 43210 USA

[3] Univ Diego Portales, Fac Ingn, Nucleo Astron, Ave Ejercito 441, Santiago, Chile

[4] Millennium Inst Astrophys, Santiago, Chile

[5] Morehead State Univ, Dept Earth & Space Sci, 235 Martindale Dr, Morehead, KY 40351 USA

[6] Peking Univ, Dept Astron, Yi He Yuan Rd 5, Beijing 100871, Peoples R China

[7] Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA

[8] Peking Univ, Kavli Inst Astron & Astrophys, Yi He Yuan Rd 5, Beijing 100871, Peoples R China

[9] Grove City High Sch, 4665 Hoover Rd, Grove City, OH 43123 USA

[10] Ohio State Univ, Dept Phys, 191 Woodruff Ave, Columbus, OH 43210 USA

[11] Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England

[12] Coral Towers Observ, Cairns, Qld 4870, Australia

[13] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[14] Warsaw Univ Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 463卷 / 04期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

accretion; accretion discs; black hole physics; galaxies: nuclei; ACTIVE GALACTIC NUCLEI; MAIN-SEQUENCE STAR; BLACK-HOLE MASSES; X-RAY OUTBURST; ULTRAVIOLET-BRIGHT; QUIESCENT GALAXY; DISCOVERY; FLARE; MULTIWAVELENGTH; VARIABILITY;

D O I：

10.1093/mnras/stw2272

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present ground-based and Swift photometric and spectroscopic observations of the tidal disruption event (TDE) ASASSN-15oi, discovered at the centre of 2MASX J20390918-3045201 (d similar or equal to 216 Mpc) by the All-Sky Automated Survey for SuperNovae. The source peaked at a bolometric luminosity of L similar or equal to 1.3 x 10(44) erg s(-1) and radiated a total energy of E similar or equal to 6.6 x 10(50) erg over the first similar to 3.5 months of observations. The early optical/UV emission of the source can be fit by a blackbody with temperature increasing from T similar to 2 x 10(4) K to T similar to 4 x 10(4) K while the luminosity declines from L similar or equal to 1.3 x 10(44) erg s(-1) to L similar or equal to 2.3 x 10(43) erg s(-1), requiring the photosphere to be shrinking rapidly. The optical/UV luminosity decline during this period is most consistent with an exponential decline, L proportional to e(-(t-t0)/tau), with tau similar or equal to 46.5 d for t(0) similar or equal to 57241.6 (MJD), while a power-law decline of L proportional to (t - t(0))(-alpha) with t(0) similar or equal to 57 212.3 and alpha = 1.62 provides a moderately worse fit. ASASSN-15oi also exhibits roughly constant soft X-ray emission that is significantly weaker than the optical/UV emission. Spectra of the source show broad helium emission lines and strong blue continuum emission in early epochs, although these features fade rapidly and are not present similar to 3 months after discovery. The early spectroscopic features and colour evolution of ASASSN-15oi are consistent with a TDE, but the rapid spectral evolution is unique among optically selected TDEs.

引用

页码：3813 / 3828

页数：16

共 94 条

[1] Image subtraction using a space-varying kernel [J].

Alard, C .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 2000, 144 (02) :363-370

[2] DISCOVERY OF AN OUTFLOW FROM RADIO OBSERVATIONS OF THE TIDAL DISRUPTION EVENT ASASSN-14li [J].

Alexander, K. D. ;

Berger, E. ;

Guillochon, J. ;

Zauderer, B. A. ;

Williams, P. K. G. .

ASTROPHYSICAL JOURNAL LETTERS, 2016, 819 (02)

[3] A CONTINUUM OF H- TO He-RICH TIDAL DISRUPTION CANDIDATES WITH A PREFERENCE FOR E plus A GALAXIES [J].

Arcavi, Iair ;

Gal-Yam, Avishay ;

Sullivan, Mark ;

Pan, Yen-Chen ;

Cenko, S. Bradley ;

Horesh, Assaf ;

Ofek, Eran O. ;

De Cia, Annalisa ;

Yan, Lin ;

Yang, Chen-Wei ;

Howell, D. A. ;

Tal, David ;

Kulkarni, Shrinivas R. ;

Tendulkar, Shriharsh P. ;

Tang, Sumin ;

Xu, Dong ;

Sternberg, Assaf ;

Cohen, Judith G. ;

Bloom, Joshua S. ;

Nugent, Peter E. ;

Kasliwal, Mansi M. ;

Perley, Daniel A. ;

Quimby, Robert M. ;

Miller, Adam A. ;

Theissen, Christopher A. ;

Laher, Russ R. .

ASTROPHYSICAL JOURNAL, 2014, 793 (01)

[4]

Arnaud KA, 1996, ASTR SOC P, V101, P17

[5] MID-INFRARED SELECTION OF ACTIVE GALACTIC NUCLEI WITH THE WIDE-FIELD INFRARED SURVEY EXPLORER. II. PROPERTIES OF WISE-SELECTED ACTIVE GALACTIC NUCLEI IN THE NDWFS BOOTES FIELD [J].

Assef, R. J. ;

Stern, D. ;

Kochanek, C. S. ;

Blain, A. W. ;

Brodwin, M. ;

Brown, M. J. I. ;

Donoso, E. ;

Eisenhardt, P. R. M. ;

Jannuzi, B. T. ;

Jarrett, T. H. ;

Stanford, S. A. ;

Tsai, C. -W. ;

Wu, J. ;

Yan, L. .

ASTROPHYSICAL JOURNAL, 2013, 772 (01)

[6]

Bade N, 1996, ASTRON ASTROPHYS, V309, pL35

[7] Cleaning the USNO-B catalog through automatic detection of optical artifacts [J].

Barron, Jonathan T. ;

Stumm, Christopher ;

Hogg, David W. ;

Lang, Dustin ;

Roweis, Sam .

ASTRONOMICAL JOURNAL, 2008, 135 (01) :414-422

[8] A Possible Relativistic Jetted Outburst from a Massive Black Hole Fed by a Tidally Disrupted Star [J].

Bloom, Joshua S. ;

Giannios, Dimitrios ;

Metzger, Brian D. ;

Cenko, S. Bradley ;

Perley, Daniel A. ;

Butler, Nathaniel R. ;

Tanvir, Nial R. ;

Levan, Andrew J. ;

Brien, Paul T. O' ;

Strubbe, Linda E. ;

De Colle, Fabio ;

Ramirez-Ruiz, Enrico ;

Lee, William H. ;

Nayakshin, Sergei ;

Quataert, Eliot ;

King, Andrew R. ;

Cucchiara, Antonino ;

Guillochon, James ;

Bower, Geoffrey C. ;

Fruchter, Andrew S. ;

Morgan, Adam N. ;

van der Horst, Alexander J. .

SCIENCE, 2011, 333 (6039) :203-206

[9] SUPERNOVA 2009kf: AN ULTRAVIOLET BRIGHT TYPE IIP SUPERNOVA DISCOVERED WITH PAN-STARRS 1 AND GALEX [J].

Botticella, M. T. ;

Trundle, C. ;

Pastorello, A. ;

Rodney, S. ;

Rest, A. ;

Gezari, S. ;

Smartt, S. J. ;

Narayan, G. ;

Huber, M. E. ;

Tonry, J. L. ;

Young, D. ;

Smith, K. ;

Bresolin, F. ;

Valenti, S. ;

Kotak, R. ;

Mattila, S. ;

Kankare, E. ;

Wood-Vasey, W. M. ;

Riess, A. ;

Neill, J. D. ;

Forster, K. ;

Martin, D. C. ;

Stubbs, C. W. ;

Burgett, W. S. ;

Chambers, K. C. ;

Dombeck, T. ;

Flewelling, H. ;

Grav, T. ;

Heasley, J. N. ;

Hodapp, K. W. ;

Kaiser, N. ;

Kudritzki, R. ;

Luppino, G. ;

Lupton, R. H. ;

Magnier, E. A. ;

Monet, D. G. ;

Morgan, J. S. ;

Onaka, P. M. ;

Price, P. A. ;

Rhoads, P. H. ;

Siegmund, W. A. ;

Sweeney, W. E. ;

Wainscoat, R. J. ;

Waters, C. ;

Waterson, M. F. ;

Wynn-Williams, C. G. .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 717 (01) :L52-L56

[10] Further calibration of the Swift ultraviolet/optical telescope [J].

Breeveld, A. A. ;

Curran, P. A. ;

Hoversten, E. A. ;

Koch, S. ;

Landsman, W. ;

Marshall, F. E. ;

Page, M. J. ;

Poole, T. S. ;

Roming, P. ;

Smith, P. J. ;

Still, M. ;

Yershov, V. ;

Blustin, A. J. ;

Brown, P. J. ;

Gronwall, C. ;

Holland, S. T. ;

Kuin, N. P. M. ;

McGowan, K. ;

Rosen, S. ;

Boyd, P. ;

Broos, P. ;

Carter, M. ;

Chester, M. M. ;

Hancock, B. ;

Huckle, H. ;

Immler, S. ;

Ivanushkina, M. ;

Kennedy, T. ;

Mason, K. O. ;

Morgan, A. N. ;

Oates, S. ;

De Pasquale, M. ;

Schady, P. ;

Siegel, M. ;

Berk, D. Vanden .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 406 (03) :1687-1700

← 1 2 3 4 5 6 7 8 9 10 →