Probing the tidal disruption event iPTF16axa with <scp>cloudy</scp> and disc-wind models

نویسندگان

چکیده

We present both a disc-wind model on the optical/UV emission continuum and CLOUDY modelling spectral lines of tidal disruption event (TDE) iPTF16axa to understand properties atmosphere that impacts line luminosity TDE. Assuming from wind due disc super-Eddington phase, we use steady structured with spherical constant velocity fit observations multiple days. The extracted parameters are stellar-mass $M_{\star} = 6.20 \pm 1.19 M_{\odot}$, radiative efficiency $\log_{\rm 10}(\eta) -1.22 1.327$, inner radius $r_l (2.013 0.551) \times 10^{14}~{\rm cm}$ $v_w 18999.4 1785.1 ~{\rm km~s^{-1}}$. photosphere temperature for is $ \sim 2 10^4~{\rm K}$ single blackbody $\sim 0.995 10^5~{\rm K}$. also perform explain observed He H luminosities estimate 7.07 1.3 independent analyses using models show comparable results agree observations. finds super solar abundance smaller II optical depth responsible enhancement over H$\alpha$ luminosity. super-solar agrees relatively large stellar mass suggests disrupted star might have been red giant.

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ژورنال

عنوان ژورنال: Monthly Notices of the Royal Astronomical Society

سال: 2022

ISSN: ['0035-8711', '1365-8711', '1365-2966']

DOI: https://doi.org/10.1093/mnras/stac3501