J/A+A/710/L34 TDE 2025aarm light curves (Simongini+, 2026)
Early emission characterization of TDE 2025aarm.
Simongini A., Kherlakian M., Lopez-Oramas A., Becerra J., Cerasole D.
<Astron. Astrophys. 710, L34 (2026)>
=2026A&A...710L..34S 2026A&A...710L..34S (SIMBAD/NED BibCode)
ADC_Keywords: Black holes ; Photometry ; Optical ; Ultraviolet
Keywords: black hole physics - galaxies: nuclei
Abstract:
In this work, we present early emission data analysis of the tidal
disruption event TDE 2025aarm, including optical, UV and X-ray data.
At a redshift of z=0.01368, TDE 2025aarm is the second closest TDE
ever discovered, offering an unprecedented opportunity to study such
phenomena in great details. We observed TDE 2025aarm in optical with
the Liverpool Telescope for a total of three epochs, and complemented
our dataset with ancillary spectroscopic and photometric data. The
early optical spectra are characterized by a blue-continuum and
helium, hydrogen and possibly Bowen lines typical of H+He events. The
optical light curves peak at Mg~-18.68mag and are well described by
fallback of a M*∼0.16M☉ star onto a MBH∼2x107M☉ black
hole. We report Swift-XRT detection in the 0.3-10keV range, with a
total flux of FX∼1.42x10-14erg/cm2/s, fitted by a black-body
with kBT∼0.39keV. This makes TDE 2025aarm a new event among
optical/UV bright TDEs detected in soft X-rays. Our analysis suggests
that the early emission from TDE 2025aarm is powered by
circularization shocks, and that the delayed accretion scenario best
describes the observed features.
Description:
TDE 2025aarm was observed with the Zwicky Transient Facility (ZTF;
Graham et al., 2019ATel13268....1G 2019ATel13268....1G) in the g and r bands, with the
Asteroid Terrestrial-impact Last Alert System (ATLAS; Tonry et al.,
2018ApJ...867..105T 2018ApJ...867..105T) in the o and c bands, and with the UV-Optical
Telescope (UVOT; Roming et al., 2005GCN..4309....1R 2005GCN..4309....1R) on board of the
Neil Gehrels Swift Observatory.
We collected these data from public repositories. Data were reduced
using the uvotredux software and galaxy contamination was subtracted
with the prospector package (Johnson et al., 2021ApJS..254...22J 2021ApJS..254...22J)
Objects:
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RA (2000) DE Designation(s)
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04 32 12.399 -05 22 39.51 TDE 2025aarm
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee3.dat 37 262 TDE 2025aarm light curves
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Byte-by-byte Description of file: tablee3.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 d MJD Date of observation (MJD)
10- 15 F6.2 d Phase Phase from tpeak,
tpeak estimated at MJD=61006.38±3.26
17- 21 F5.2 mag mag Apparent magnitude in Band
23- 26 F4.2 mag e_mag Magnitude error
28- 31 A4 --- Band [U g r o c mmm2 www1 www2] Observed band
33- 37 A5 --- Inst Instrument (ATLAS, Swift, ZTF)
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Acknowledgements:
Andrea Simongini, andrea.simongini(at)inaf.it
License: CC-BY-4.0
(End) Patricia Vannier [CDS] 04-Jun-2026