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Recent studies suggest that tidal disruption events (TDEs) with off-axis jets may manifest as optically overluminous events. To search for jet signatures at late times, we conducted radio observations of eight such optically overluminous…

Intelligent, large-scale IoT ecosystems have become possible due to recent advancements in sensing technologies, distributed learning, and low-power inference in embedded devices. In traditional cloud-centric approaches, raw data is…

Machine Learning · Computer Science 2023-05-16 Theo Chow , Usman Raza , Ioannis Mavromatis , Aftab Khan

The ATLAS detector at CERN has completed its first full year of recording collisions at 7 TeV, resulting in billions of events and petabytes of data. At these scales, physicists must have the capability to read only the data of interest to…

Data Analysis, Statistics and Probability · Physics 2015-03-13 Peter van Gemmeren , David Malon

The tidal disruption of a star by a massive black hole (MBH) is thought to produce a transient luminous event. Such tidal disruption events (TDEs) may play an important role in the detection and characterization of MBHs and probe the…

Astrophysics of Galaxies · Physics 2016-06-08 Danor Aharon , Alessandra Mastrobuono Battisti , Hagai B. Perets

The rate of tidal disruption events (TDEs), $R_\text{TDE}$, is predicted to depend on stellar conditions near the super-massive black hole (SMBH), which are on difficult-to-measure sub-parsec scales. We test whether $R_\text{TDE}$ depends…

High Energy Astrophysical Phenomena · Physics 2018-02-07 Or Graur , K. Decker French , H. Jabran Zahid , James Guillochon , Kaisey S. Mandel , Katie Auchettl , Ann I. Zabludoff

Stellar tidal disruption events (TDEs) are typically discovered by transient emission due to accretion or shocks of the stellar debris. Yet this luminous flare can be reprocessed by gas or dust that inhabits a galactic nucleus, resulting in…

High Energy Astrophysical Phenomena · Physics 2021-07-27 Sjoert van Velzen , Dheeraj R. Pasham , Stefanie Komossa , Lin Yan , Erin A. Kara

The Vera C. Rubin Observatory's 10-Year Legacy Survey of Space and Time (LSST) is expected to produce a hundredfold increase in the number of transients we observe. However, there are insufficient spectroscopic resources to follow up on all…

Host galaxies of tidal disruption events (TDEs) show enhanced central stellar concentration and are preferentially found in post-starburst and green valley populations. This connection has led to the proposal that TDE host galaxies likely…

In the identification of new planetary candidates in transit surveys, the employment of Deep Learning models proved to be essential to efficiently analyse a continuously growing volume of photometric observations. To further improve the…

Only a tiny fraction ~ 1% of stellar tidal disruption events (TDE) generate powerful relativistic jets evidenced by luminous hard X-ray and radio emissions. We propose that a key property responsible for both this surprisingly low rate and…

High Energy Astrophysical Phenomena · Physics 2023-08-11 Odelia Teboul , Brian D. Metzger

This study introduces an approach to detecting exocomet transits in the dataset of the Transiting Exoplanet Survey Satellite (TESS), specifically within its Sector 1. Given the limited number of exocomet transits detected in the observed…

Earth and Planetary Astrophysics · Physics 2024-03-01 D. V. Dobrycheva , M. Yu. Vasylenko , I. V. Kulyk , Ya. V. Pavlenko , O. S. Shubina , I. V. Luk'yanyk , P. P. Korsun

We present and analyse a new tidal disruption event (TDE), AT2017eqx at redshift z=0.1089, discovered by Pan-STARRS and ATLAS. The position of the transient is consistent with the nucleus of its host galaxy; it peaks at a luminosity of $L…

We present a detailed radio study of the tidal disruption events (TDEs) AT 2020zso and AT 2021sdu. Both exhibit transient radio emission beginning shortly after optical discovery and persisting for several years. For AT 2020zso, we identify…

This is the third sequel in a series discussing the discovery of various types of extragalactic transients with the {\it James Webb Space Telescope} in a narrow-field ($\sim 0.1$ deg$^2$), moderately deep ($m_{AB} \sim 27$ mag) survey. In…

High Energy Astrophysical Phenomena · Physics 2021-03-17 E. Regos , J. Vinko , Z. Stermeczky

We study the emission properties of thermonuclear explosions in a helium white dwarf (WD) tidal disruption event (TDE). We consider a TDE where a 0.2 $M_{\odot}$ helium WD is disrupted by a $10^{2.5}\,M_{\odot}$ intermediate-mass black hole…

High Energy Astrophysical Phenomena · Physics 2020-02-24 Kojiro Kawana , Keiichi Maeda , Naoki Yoshida , Ataru Tanikawa

Tidal disruption events (TDEs) are transient, multi-wavelength events in which a star is ripped apart by a supermassive black hole. Observations show that in a small fraction of TDEs, a short-lived, synchrotron emitting jet is produced. We…

AT 2018hyz (=ASASSN-18zj) is a tidal disruption event (TDE) located in the nucleus of a quiescent E+A galaxy at a redshift of $z = 0.04573$, first detected by the All-Sky Automated Survey for Supernovae (ASAS-SN). We present optical+UV…

Tidal disruption events (TDEs), characterized by their luminous transients and high-velocity outflows, have emerged as plausible sources of high-energy neutrinos contributing to the diffuse neutrino. In this study, we calculate the…

High Energy Astrophysical Phenomena · Physics 2024-07-17 Hanji Wu , Kai Wang , Wei Wang

During a close encounter between a star and a supermassive black hole, the star can get disrupted by the black hole's tidal forces, resulting in a tidal disruption event (TDE). The accretion of the star's material onto the black hole…

High Energy Astrophysical Phenomena · Physics 2022-05-04 J. Hampel , S. Komossa , J. Greiner , T. H. Reiprich , M. Freyberg , T. Erben

We performed a systematic search for stellar tidal disruption events (TDE) by looking for X-ray sources that were detected during the ROSAT All Sky Survey and faded by more than an order of magnitude over the next two decades according to…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Ildar Khabibullin , Sergey Sazonov