MUSE IFU observations of galaxies hosting Tidal Disruption Events

Abstract

We present an analysis of twenty tidal disruption event (TDE) host galaxies observed with the MUSE integral-field spectrograph on ESO VLT. We investigate the presence of extended emission line regions (EELRs) and study stellar populations mostly at sub-kpc scale around the host nuclei. EELRs are detected in 5/20 hosts, including two unreported systems. All EELRs are found at z<0.045, suggesting a distance bias and faint EELRs may be missed at higher redshift. EELRs only appear in post-merger systems and all such hosts at z<0.045 show them. Thus, we conclude that TDEs and galaxy mergers have a strong relation, and >45% of post-merger hosts in the sample exhibit EELRs. Furthermore, we constrained the distributions of stellar masses near the central black holes (BHs), using the spectral synthesis code Starlight and BPASS stellar evolution models. The youngest nuclear populations have typical ages of 1 Gyr and stellar masses below 2.5MSun. The populations that can produce observable TDEs around non-rotating BHs are dominated by subsolar-mass stars. 3/4 TDEs requiring larger stellar masses exhibit multi-peaked light curves, possibly implying relation to repeated partial disruptions of high-mass stars. The found distributions are in tension with the masses of the stars derived using light curve models. Mass segregation of the disrupted stars can enhance the rate of TDEs from supersolar-mass stars but our study implies that low-mass TDEs should still be abundant and even dominate the distribution, unless there is a mechanism that prohibits low-mass TDEs or their detection.

Accepted for publication in MNRAS on 2025-11-21

References in corpus (38)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• The MUSE second-generation VLT instrument
• The effect of massive binaries on stellar populations and supernova progenitors
• A Continuum of H- to He-Rich Tidal Disruption Candidates With a Preference for E+A Galaxies
• The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole
• Spectroscopy of superluminous supernova host galaxies. A preference of hydrogen-poor events for extreme emission line galaxies
• The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey
• Black hole masses of tidal disruption event host galaxies
• Tidal Disruption Event Host Galaxies in the Context of the Local Galaxy Population
• Black hole masses of tidal disruption event host galaxies II
• Live to die another day: the rebrightening of AT2018fyk as a repeating partial tidal disruption event
• Systematic light curve modelling of TDEs: statistical differences between the spectroscopic classes
• Virgo Redux: The Masses and Stellar Content of Nuclei in Early-Type Galaxies from Multi-Band Photometry and Spectroscopy
• Investigating the diversity of supernovae type Iax: A MUSE and NOT spectroscopic study of their environments
• Redback: A Bayesian inference software package for electromagnetic transients
• MUSE Reveals a Recent Merger in the Post-starburst Host Galaxy of the TDE ASASSN-14li
• Fainter harder brighter softer: a correlation between ${\alpha }_{\mathrm{ox}}$ , X-ray spectral state and Eddington ratio in tidal disruption events
• A Blast from the Pasture: Studying the environment of AT 2018cow with MUSE
• Period Evolution of Repeating Transients in Galactic Nuclei
• Carbon and Nitrogen Abundance Ratio In the Broad Line Region of Tidal Disruption Events
• Fading AGN in Post-Starburst Galaxies
• Evidence for the preferential disruption of moderately massive stars by supermassive black holes
• The bulge masses of TDE host galaxies and their scaling with black hole mass
• The delay time distribution of supernovae from integral-field spectroscopy of nearby galaxies
• A characterization of ASAS-SN core-collapse supernova environments with VLT+MUSE: I. Sample selection, analysis of local environments, and correlations with light curve properties
• The fast transient AT 2023clx in the nearby LINER galaxy NGC 3799 as a tidal disruption of a very low-mass star
• AT 2023clx: the Faintest and Closest Optical Tidal Disruption Event Discovered in Nearby Star-forming Galaxy NGC 3799
• Tidal Disruption Events through the Lens of the Cooling Envelope Model
• A metallicity dependence on the occurrence of core-collapse supernovae
• AT2018fyk: Candidate Tidal Disruption Event by a (Super)massive Black Hole Binary
• Evidence for a steeper SMBH-Bulge mass relationship extended to low masses using TDE host galaxies
• La Silla-QUEST Variability Survey in the Southern Hemisphere
• Extended Emission-line Region in a Poststarburst Galaxy Hosting Tidal Disruption Event AT2019qiz and Quasiperiodic Eruptions
• Resolving the Nuclear Environments of Tidal Disruption Event Host Galaxies within 45 pc
• Black hole mass and optical radiation mechanism of the tidal disruption event AT 2023clx
• Mass Segregation and Transient Formation in Nuclear Stellar Clusters

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