Results 41 to 50 of about 1,089,729 (237)

First tidal disruption events discovered by SRG/eROSITA: X-ray/optical properties and X-ray luminosity function at z < 0.6 [PDF]

Monthly notices of the Royal Astronomical Society, 2021
We present the first sample of tidal disruption events (TDEs) discovered during the SRG all-sky survey. These 13 events were selected among X-ray transients detected in the 0 < l < 180○ hemisphere by eROSITA during its second sky survey (10 June–14 ...
S. Sazonov, M. Gilfanov, P. Medvedev, Y. Yao, G. Khorunzhev, A. Semena, R. Sunyaev, R. Burenin, A. Lyapin, A. Meshcheryakov, G. Uskov, I. Zaznobin, K. Postnov, A. Dodin, A. Belinski, A. Cherepashchuk, M. Eselevich, S. N. Dodonov, A. Grokhovskaya, S. Kotov, I. Bikmaev, R. Zhuchkov, R. Gumerov, S. Velzen, S. Kulkarni   +24 more
semanticscholar   +1 more source

Tidal stability of giant molecular clouds in the Large Magellanic Cloud [PDF]

, 2013
Star formation does not occur until the onset of gravitational collapse inside giant molecular clouds. However, the conditions that initiate cloud collapse and regulate the star formation process remain poorly understood.
Hughes, A., Maddison, S. T., Thilliez, E., Wong, T.   +3 more
core   +1 more source

Possible X-Ray Quasi-periodic Eruptions in a Tidal Disruption Event Candidate [PDF]

Astrophysical Journal Letters, 2021
X-ray quasi-periodic eruptions (QPEs) are a recently discovered phenomenon associated with supermassive black holes at the centers of galaxies. They are high-amplitude soft X-ray flares that recur on timescales of hours, but what causes these flares ...
J. Chakraborty, E. Kara, M. Masterson, M. Giustini, G. Miniutti, R. Saxton   +5 more
semanticscholar   +1 more source

Deciphering the extreme X-ray variability of the nuclear transient eRASSt J045650.3-203750. A likely repeating partial tidal disruption event [PDF]

Astronomy & Astrophysics, 2022
(Abridged) In this paper, we present the results of an exceptional repeating X-ray nuclear transient, eRASSt J045650.3-203750 (hereafter J0456-20), uncovered by SRG/eROSITA in a quiescent galaxy at redshift of z~0.077.
Zhu Liu, A. Malyali, M. Krumpe, D. Homan, A. Goodwin, I. Grotova, A. Kawka, A. Rau, A. Merloni, G. Anderson, J. Miller-Jones, A. Markowitz, S. Ciroi, F. D. Mille, M. Schramm, Shenli Tang, D. Buckley, M. Gromadzki, C. Jin, J. Buchner   +19 more
semanticscholar   +1 more source

An Earth-sized Planet on the Verge of Tidal Disruption [PDF]

Astronomical Journal
TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R ⊕) with an orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine the planet’s mass to be 1.44 ± 0.14 M ⊕.
Fei Dai, Andrew W. Howard, S. Halverson, J. Orell-Miquel, E. Pallé, H. Isaacson, Benjamin J. Fulton, E. Price, Mykhaylo Plotnykov, Leslie A. Rogers, Diana Valencia, Kimberly Paragas, M. Greklek-McKeon, Jonathan Gomez Barrientos, H. Knutson, E. Petigura, L. Weiss, Rena A. Lee, C. Brinkman, Dan Huber, G. Stefánsson, K. Masuda, S. Giacalone, Cicero X. Lu, E. Kite, R. Hu, E. Gaidos, Michael Zhang, R. Rubenzahl, J. Winn, Te Han, C. Beard, R. Holcomb, Aaron Householder, Gregory J. Gilbert, J. Lubin, J. Ong, A. Polanski, Nicholas Saunders, Judah Van Zandt, S. Yee, Jingwen Zhang, Jon K. Zink, Bradford Holden, A. Baker, Max Brodheim, I. Crossfield, W. Deich, Jerry Edelstein, Steve R. Gibson, Grant M. Hill, S. Jelinsky, Marc Kassis, Russ R. Laher, Kyle Lanclos, S. Lilley, Joel N. Payne, K. Rider, P. Robertson, Arpita Roy, C. Schwab, Abby P. Shaum, M. Sirk, Christopher L. Smith, Adam Vandenberg, Josh Walawender, S. X. Wang, S. Wang, E. Wishnow, J. Wright, Sherry Yeh, J. A. Caballero, J. Morales, F. Murgas, E. Nagel, A. Reiners, A. Schweitzer, H. Tabernero, M. Zechmeister, A. Spencer, D. Ciardi, C. A. Clark, M. Lund, D. Caldwell, K. Collins, R. Schwarz, K. Barkaoui, Cristilyn N. Watkins, A. Shporer, N. Narita, A. Fukui, G. Srdoc, D. Latham, J. Jenkins, G. Ricker, S. Seager, R. Vanderspek   +96 more
semanticscholar   +1 more source

A tidal disruption event coincident with a high-energy neutrino [PDF]

Nature Astronomy, 2020
Cosmic neutrinos provide a unique window into the otherwise hidden mechanism of particle acceleration in astrophysical objects. The IceCube Collaboration recently reported the likely association of one high-energy neutrino with a flare from the ...
R. Stein, S. Velzen, M. Kowalski, A. Franckowiak, S. Gezari, J. Miller-Jones, S. Frederick, I. Sfaradi, M. Bietenholz, A. Horesh, R. Fender, S. Garrappa, T. Ahumada, I. Andreoni, J. Belicki, E. Bellm, M. Böttcher, V. Brinnel, R. Burruss, S. Cenko, M. Coughlin, V. Cunningham, A. Drake, G. Farrar, M. Feeney, R. Foley, A. Gal-yam, V. Golkhou, A. Goobar, M. Graham, E. Hammerstein, G. Helou, T. Hung, M. Kasliwal, C. Kilpatrick, A. Kong, T. Kupfer, R. Laher, A. Mahabal, F. Masci, J. Necker, J. Nordin, D. Perley, M. Rigault, S. Reusch, H. Rodriguez, C. Rojas-Bravo, B. Rusholme, D. Shupe, L. Singer, J. Sollerman, M. Soumagnac, D. Stern, Kirsty Taggart, J. Santen, C. Ward, P. Woudt, Yuhan Yao   +57 more
semanticscholar   +1 more source

GRB060218 as a Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole [PDF]

, 2013
A highly unusual pair of a gamma-ray burst (GRB) GRB060218 and an associated supernova SN2006aj has puzzled theorists for years. A supernova shock breakout and a jet from a newborn stellar mass compact object were put forward to explain its ...
Bode, Tanja, Haas, Roland, Laguna, Pablo, Pe'er, Asaf, Reynolds, Christopher S., Shcherbakov, Roman V.   +5 more
core   +2 more sources

A Candidate Relativistic Tidal Disruption Event at 340 Mpc [PDF]

Astrophysical Journal, 2022
We present observations of an extreme radio flare, VT J024345.70-284040.08, hereafter VT J0243, from the nucleus of a galaxy with evidence for historic Seyfert activity at redshift z = 0.074. Between NRAO Very Large Array (VLA) Sky Survey observations in
J. Somalwar, V. Ravi, D. Dong, Yuyang Chen, S. Breen, P. Chandra, T. Clarke, K. De, B. Gaensler, G. Hallinan, S. Laha, C. Law, S. Myers, T. Parsotan, W. Peters, E. Polisensky   +15 more
semanticscholar   +1 more source

AT 2023clx: The Faintest and Closest Optical Tidal Disruption Event Discovered in Nearby Star-forming Galaxy NGC 3799

The Astrophysical Journal Letters, 2023
We report the discovery of a faint optical tidal disruption event (TDE) in the nearby star-forming galaxy NGC 3799. Identification of the TDE is based on its position at the galaxy nucleus, a light curve declining as t ^−5/3 , a blue continuum with an ...
Jiazheng Zhu, Ning Jiang, Tinggui Wang, Shifeng Huang, Zheyu Lin, Yibo Wang, Jian-Guo Wang   +6 more
doaj   +1 more source

Tidal Disruption Flares as the Source of Ultra-high Energy Cosmic Rays [PDF]

, 2012
The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model.
Farrar, Glennys R.
core   +2 more sources