Discovery of ATLAS17jrp as an Optical, X-ray and Infrared Bright TDE in a Star-forming Galaxy

Abstract

We hereby report the discovery of ATLAS17jrp as an extraordinary TDE in star-forming galaxy SDSSJ162034.99+240726.5 in our recent sample of mid-infrared outbursts in nearby galaxies. Its optical/UV light curves rise to a peak luminosity $\sim 1.06\times 10^{44}\mathrm{erg}{\mathrm{s}}^{-1}$ in about a month and then decay as ${\mathrm{t}}^{-5/3}$ with a roughly constant temperature around 19000~K, and the optical spectra show a blue continuum and very broad Balmer lines with FWHM$\sim$15000 km/s which gradually narrowed to 1400 km/s within 4 years, all agreeing well with other optical TDEs. A delayed and rapidly rising X-ray flare with a peak luminosity $\sim 1.27\times 10^{43}\mathrm{erg}{\mathrm{s}}^{-1}$ was detected at $\sim$ 170 days after the optical peak. The high MIR luminosity of ATLAS17jrp ($\sim 2\times 10^{43}\mathrm{erg}{\mathrm{s}}^{-1}$) has revealed a distinctive dusty environment with covering factor as high as $\sim 0.2$, that is comparable with that of torus in active galactic nuclei but at least one order of magnitude higher than normal optical TDEs. Therefore, ATLAS17jrp turns out to be one of the rare unambiguous TDE found in star-forming galaxies and its high dust covering factor implies that the dust extinction could play an important role in the absence of optical TDEs in star-forming galaxies.

8 pages, 5 figures. Accepted to be published in ApJL

References in corpus (22)

• The Zwicky Transient Facility: System Overview, Performance, and First Results
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• Initial Performance of the NEOWISE Reactivation Mission
• A Continuum of H- to He-Rich Tidal Disruption Candidates With a Preference for E+A Galaxies
• Tidal Disruption Events
• Seventeen Tidal Disruption Events from the First Half of ZTF Survey Observations: Entering a New Era of Population Studies
• Design and operation of the ATLAS Transient Science Server
• Stellar Masses and SFRs for 1M Galaxies from SDSS and WISE
• A tidal disruption event coincident with a high-energy neutrino
• Optical-Ultraviolet Tidal Disruption Events
• X-ray Brightening and UV Fading of Tidal Disruption Event ASASSN-15oi
• The Host Galaxies of Tidal Disruption Events
• TDE Hosts are Green and Centrally Concentrated: Signatures of a Post-Merger System
• Infrared Echoes of Optical Tidal Disruption Events: ~1% Dust Covering Factor or Less at sub-parsec Scale
• Mid-InfraRed Outburst in Nearby Galaxies (MIRONG) I: Sample Selection and Characterization
• Reverberation in tidal disruption events: dust echoes, coronal emission lines, multi-wavelength cross-correlations, and QPOs
• Rapid late-time X-ray brightening of the tidal disruption event OGLE16aaa
• X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary
• Mid-InfraRed Outbursts in Nearby Galaxies (MIRONG). II. Optical Spectroscopic Follow-up
• Forward Modeling Populations of Flares from Tidal Disruptions of Stars by Super-massive Black Holes

Cited by in corpus (14)

• Delayed Appearance and Evolution of Coronal Lines in the TDE AT2019qiz
• The nuclear transient AT 2017gge: a tidal disruption event in a dusty and gas-rich environment and the awakening of a dormant SMBH
• Energetic nuclear transients in luminous and ultraluminous infrared galaxies
• Two Candidate Obscured Tidal Disruption Events Coincident with High-energy Neutrinos
• A luminous dust-obscured Tidal Disruption Event candidate in a star forming galaxy at 42 Mpc
• eRASSt J074426.3+291606: prompt accretion disc formation in a 'faint and slow' tidal disruption event
• AT2018dyk Revisited: a Tidal Disruption Event Candidate with Prominent Infrared Echo and Delayed X-ray Emission in a LINER Galaxy
• Demographics of Tidal Disruption Events with L-Galaxies: I. Volumetric TDE rates and the abundance of Nuclear Star Clusters
• The rate of extreme coronal line emitting galaxies in the Sloan Digital Sky Survey and their relation to tidal disruption events
• Flaires: A Comprehensive Catalog of Dust-Echo-like Infrared Flares
• A Torus Remnant Revealed by the Infrared Echo of Tidal Disruption Event AT 2019qiz: Implications for the Missing Energy and Quasiperiodic Eruption Formation
• AT2021acak: a candidate tidal disruption event found in the Zwicky Transient Facility survey
• Unveiling the Cosmic Dance of Repeated Nuclear Transient ASASSN-14ko: Insights from Multiwavelength Observations
• Insights from the "Red devil" AT 2022fpx: A Dust-reddened Family of Tidal Disruption Events Excluded by Their Apparent Red Color?