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- W4308012973 abstract "A supermassive black hole (SMBH) of $sim 3times 10^6 , rm M_odot$ was recently detected via dynamical measurements at the center of the dwarf galaxy Leo I. Standing $sim 2$ orders of magnitude above standard scaling relations, this SMBH is hosted by a galaxy devoid of gas and with no significant star formation in the last $sim 1$ Gyr. This detection can profoundly impact the formation models for black holes and their hosts. We propose that winds from a population of $sim 100$ evolved stars within the Bondi radius of the SMBH produce a sizable accretion rate, with Eddington ratios between $9times10^{-8}$ and $9times10^{-7}$, depending on the value of the stellar mass loss. These rates are typical of SMBHs accreting in advection-dominated accretion flow (ADAF) mode. The predicted spectrum peaks in the microwaves at $sim 0.1-1$ THz ($300-3000 , mathrm{mu m}$) and exhibits significant variations at higher energies depending on the accretion rate. We predict a radio flux of $sim 0.1$ mJy at $6$ GHz, mildly dependent on the accretion properties. Deep imaging with Chandra, VLA, and ALMA can confirm the presence of this SMBH and constrain its accretion flow." @default.
- W4308012973 created "2022-11-07" @default.
- W4308012973 creator A5027925545 @default.
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- W4308012973 date "2022-10-31" @default.
- W4308012973 modified "2023-10-18" @default.
- W4308012973 title "Accretion from Winds of Red Giant Branch Stars May Reveal the Supermassive Black Hole in Leo I" @default.
- W4308012973 doi "https://doi.org/10.48550/arxiv.2211.00019" @default.
- W4308012973 hasPublicationYear "2022" @default.
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