2019
DOI: 10.1093/mnras/stz1602
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Black hole masses of tidal disruption event host galaxies II

Abstract: We present new medium resolution, optical long-slit spectra of a sample of 6 UV/optical and 17 X-ray selected tidal disruption event candidate host galaxies. We measure emission line ratios from the optical spectra, finding that the large majority of hosts are quiescent galaxies, while those displaying emission lines are generally consistent with star-formation dominated environments; only 3 sources show clear evidence of nuclear activity. We measure bulge velocity dispersions using absorption lines and infer … Show more

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Cited by 116 publications
(117 citation statements)
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References 99 publications
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“…The SED of ASASSN-18jd is TDE-like, with a strong blue continuum that is reasonably-well fit by a blackbody with temperature T 2.5 × 10 4 K. With a maximum observed luminosity of Lmax = 4.5 +0.6 −0.3 × 10 44 erg s −1 , ASASSN-18jd would be one of the most luminous optically-discovered TDEs to date, and its host galaxy would be one of the most massive TDE host galaxies. Our SMBH mass estimate of log MBH/M = 7.6 ± 0.4 is one of the largest masses for a SMBH associated with an observed TDE (Wevers et al 2017(Wevers et al , 2019a.…”
Section: Asassn-18jd As a Tdementioning
confidence: 72%
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“…The SED of ASASSN-18jd is TDE-like, with a strong blue continuum that is reasonably-well fit by a blackbody with temperature T 2.5 × 10 4 K. With a maximum observed luminosity of Lmax = 4.5 +0.6 −0.3 × 10 44 erg s −1 , ASASSN-18jd would be one of the most luminous optically-discovered TDEs to date, and its host galaxy would be one of the most massive TDE host galaxies. Our SMBH mass estimate of log MBH/M = 7.6 ± 0.4 is one of the largest masses for a SMBH associated with an observed TDE (Wevers et al 2017(Wevers et al , 2019a.…”
Section: Asassn-18jd As a Tdementioning
confidence: 72%
“…We show the mean 0.3−10 KeV X-ray luminosity of the Swift and XMM-Newton spectra (see Section 4) as a black circle.right panel ofFigure 4compares the effective blackbody radius and the tidal radius of the SMBH for ASASSN-18jd and the other TDEs. We use our SMBH mass estimate of MBH = 10 7.6 M for ASASSN-18jd and the SMBH masses fromWevers et al (2017),Holoien et al (2019a),and Wevers et al (2019a) for the other TDEs, and we compute the tidal radius, RT = R * (MBH/M * ) 1/3 , assuming a Sun-like star (1 R , 1 M ). For ASASSN-18jd, RT = 2.4 +0.8 −0.7 × 10 13 cm.…”
mentioning
confidence: 99%
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“…Below, we will argue that the second peak in the lightcurve is powered by efficient reprocessing of energetic photons from the central source into UV/optical emission. As a final note, identifying a TDE candidate with more typical TDE host galaxy parameters (Wevers et al 2019) but observational characteristics similar to ASASSN-15lh argues in favour of the TDE interpretation of that event (as opposed to a unique SN interpretation). In this interpretation the UV/optical emission and the emergence of X-ray emission after an initial non-detection are explained by the rapid formation of an accretion disk.…”
Section: Lightcurve Comparison and Secondary Maximamentioning
confidence: 92%
“…Figure 9 shows the X-shooter spectrum, obtained 206 days after peak, normalised to the continuum. We have used ppxf (Cappellari 2017) in combination with the Elodie stellar template library (Prugniel & Soubiran 2001;Prugniel et al 2007) to measure the velocity dispersion using the myriad of stellar absorption features present in the UVB arm of the spectrum (see Wevers et al 2017Wevers et al , 2019a for more details). The best-fit template is shown in Figure 9.…”
Section: Late-time Medium-resolution Spectroscopy and Black Hole Massmentioning
confidence: 99%