The black hole masses of extremely luminous radio-WISE selected galaxies

• Verfasst von: Ferris, Emily [VerfasserIn]
• Verfasst von: Blain, A. W. [VerfasserIn]
• Verfasst von: Assef, R. J. [VerfasserIn]
• Verfasst von: Hatch, N. A. [VerfasserIn]
• Verfasst von: Kimball, A. [VerfasserIn]
• Verfasst von: Kim, M. [VerfasserIn]
• Verfasst von: Sajina, A. [VerfasserIn]
• Verfasst von: Silva, A. [VerfasserIn]
• Verfasst von: Stern, D. [VerfasserIn]
• Verfasst von: Diaz-Santos, T. [VerfasserIn]
• Verfasst von: Tsai, C.-W. [VerfasserIn]
• Verfasst von: Wylezalek, Dominika [VerfasserIn]
• Titel: The black hole masses of extremely luminous radio-WISE selected galaxies
• Verf.angabe: E.R. Ferris, A.W. Blain, R.J. Assef, N.A. Hatch, A. Kimball, M. Kim, A. Sajina, A. Silva, D. Stern, T. Diaz-Santos, C.-W. Tsai and D. Wylezalek
• E-Jahr: 2021
• Jahr: 11 January 2021
• Umfang: 22 S.
• Teil: volume:502
• Teil: year:2021
• Teil: number:1
• Teil: month:03
• Teil: pages:1527-1548
• Teil: extent:22
• Fussnoten: Gesehen am 25.08.2021
• Titel Quelle: Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
• Ort Quelle: Oxford : Oxford Univ. Press, 1827
• Jahr Quelle: 2021
• Band/Heft Quelle: 502(2021), 1 vom: März, Seite 1527-1548
• ISSN Quelle: 1365-2966
• DOI: doi:10.1093/mnras/stab048
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1767860048

Abstract

We present near-IR photometry and spectroscopy of 30 extremely luminous radio and mid-IR-selected galaxies. With bolometric luminosities exceeding ∼1013 $\rm {L_{\odot }}$ and redshifts ranging from z = 0.880 to 2.853, we use Very Large Telescope instruments X-shooter and Infrared Spectrometer and Array Camera to investigate this unique population of galaxies. Broad multicomponent emission lines are detected in 18 galaxies and we measure the near-IR lines $\rm {H\,\rm {\beta }}$, $\rm{[O\,{\small III}]}\, \rm {\lambda }\rm {\lambda }4959,5007$, and $\rm {H\,\rm {\alpha }}$ in 6, 15, and 13 galaxies, respectively, with 10 $\rm {Ly\,\alpha }$ and 5 C iv lines additionally detected in the UVB arm. We use the broad $\rm{[O\,{\small III}]}\, \rm {\lambda }5007$ emission lines as a proxy for the bolometric active galactic nucleus luminosity, and derive lower limits to supermassive black hole masses of 107.9-109.4 M⊙ with expectations of corresponding host masses of 1010.4-1012.0 M⊙. We measure $\rm {\lambda }_{Edd}$ > 1 for eight of these sources at a 2σ significance. Near-IR photometry and SED fitting are used to compare stellar masses directly. We detect both Balmer lines in five galaxies and use these to infer a mean visual extinction of AV = 2.68 mag. Due to non-detections and uncertainties in our ${\rm H}\, \beta$ emission line measurements, we simulate a broad ${\rm H}\, \beta$ line of FWHM = 1480 $\rm {kms^{-1}}$ to estimate extinction for all sources with measured ${\rm H}\, \alpha$ emission. We then use this to infer a mean AV = 3.62 mag, demonstrating the highly obscured nature of these galaxies, with the consequence of increasing our estimates of black hole masses by a 0.5 orders of magnitude in the most extreme and obscured cases.