Discovery and follow-up of ASASSN-23bd (AT 2023clx): the lowest redshift and luminosity optically selected tidal disruption event

被引：3

作者：

Hoogendam, W. B. ^{[1
]}

Hinkle, J. T. ^{[1
]}

Shappee, B. J. ^{[1
]}

Auchettl, K. ^{[2
,3
]}

Kochanek, C. S. ^{[4
,5
]}

Stanek, K. Z. ^{[4
,5
]}

Maksym, W. P. ^{[6
]}

Tucker, M. A. ^{[4
,5
,7
]}

Huber, M. E. ^{[1
]}

Morrell, N. ^{[8
]}

Burns, C. R. ^{[9
]}

Hey, D. ^{[1
]}

Holoien, T. W. S. ^{[9
]}

Prieto, J. L. ^{[10
,11
]}

Stritzinger, M. ^{[12
]}

Do, A. ^{[1
]}

Polin, A. ^{[9
,13
,14
]}

Ashall, C. ^{[15
]}

Brown, P. J. ^{[16
,17
]}

DerKacy, J. M. ^{[15
]}

Ferrari, L. ^{[18
,19
]}

Galbany, L. ^{[18
,19
]}

Hsiao, E. Y. ^{[20
]}

Kumar, S. ^{[20
,21
]}

Lu, J. ^{[22
]}

Stevens, C. P. ^{[15
]}

机构：

[1] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[2] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[3] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

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

[5] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 191 W Woodruff Ave, Columbus, OH 43210 USA

[6] NASA, Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[7] Ohio State Univ, Dept Phys, 191 West Woodruff Ave, Columbus, OH USA

[8] Las Campanas Observ, Carnegie Observ, Casilla 601, La Serena 1700000, Chile

[9] Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA

[10] Univ Diego Portales, Nucleo Astron, Fac Ingn & Ciencias, Av Ejercito 441, Santiago, Chile

[11] Millennium Inst Astrophys, Santiago, Chile

[12] Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus, Denmark

[13] CALTECH, Walter Burke Inst Theoret Phys, TAPIR, Pasadena, CA 91125 USA

[14] Purdue Univ, Dept Phys & Astron 4, 525 Northwestern Ave, W Lafayette, IN 47907 USA

[15] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA

[16] George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA

[17] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[18] Inst Space Sci ICE CSIC, Campus UAB,Carrer Can Magrans s-n, E-08193 Barcelona, Spain

[19] Inst Estudis Espacials Catalunya IEEC, E-08034 Barcelona, Spain

[20] Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA

[21] Univ Virginia, Dept Astron, 530 McCormick Rd, Charlottesville, VA 22904 USA

[22] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 530卷 / 04期

关键词：

accretion; accretion discs; black hole physics; transients: tidal disruption events; CARNEGIE SUPERNOVA PROJECT; SUPERMASSIVE BLACK-HOLE; ACTIVE GALACTIC NUCLEI; DIGITAL SKY SURVEY; PHOTOMETRY DATA RELEASE; STAR-FORMING GALAXIES; MAIN-SEQUENCE STAR; X-RAY OUTBURST; IA SUPERNOVAE; STELLAR DISRUPTION;

D O I：

10.1093/mnras/stae1121

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the All-Sky Automated Survey for SuperNovae discovery of the tidal disruption event (TDE) ASASSN-23bd (AT 2023clx) in NGC 3799, a LINER galaxy with no evidence of strong active galactic nucleus (AGN) activity over the past decade. With a redshift of z = 0.01107 and a peak ultraviolet (UV)/optical luminosity of (5.4 +/- 0.4) x 10(42) erg s(-1), ASASSN-23bd is the lowest-redshift and least-luminous TDE discovered to date. Spectroscopically, ASASSN-23bd shows H alpha and He i emission throughout its spectral time series, there are no coronal lines in its near-infrared spectrum, and the UV spectrum shows nitrogen lines without the strong carbon and magnesium lines typically seen for AGN. Fits to the rising ASAS-SN light curve show that ASASSN-23bd started to brighten on MJD 59988(-1)(+1), similar to 9 d before discovery, with a nearly linear rise in flux, peaking in the g band on MJD 60000(-3)(+3). Scaling relations and TDE light curve modelling find a black hole mass of similar to 10(6) M-circle dot, which is on the lower end of supermassive black hole masses. ASASSN-23bd is a dim X-ray source, with an upper limit of L0.3-10keV <1.0x 10(40)erg s(-1) from stacking all Swift observations prior to MJD 60061, but with soft (similar to 0.1 keV) thermal emission with a luminosity of L0.3-2keV similar to 4x 10(39) erg s(-1) in XMM-Newton observations on MJD 60095. The rapid (t < 15 d) light curve rise, low UV/optical luminosity, and a luminosity decline over 40 d of Delta L-40 approximate to -0.7 dex make ASASSN-23bd one of the dimmest TDEs to date and a member of the growing 'Low Luminosity and Fast' class of TDEs.

引用

页码：4501 / 4518

页数：18