> Details

Caglar, Turgay; Koss, Michael J.; Burtscher, Leonard; Trakhtenbrot, Benny; Erdim, M. Kiyami; Mejía-Restrepo, Julian E.; Ricci, Federica; Powell, Meredith C.; Ricci, Claudio; Mushotzky, Richard; Bauer, Franz E.; Ananna, Tonima T.; Bär, Rudolf E.; Brandl, Bernhard; Brinchmann, Jarle; Harrison, Fiona; Ichikawa, Kohei; Kakkad, Darshan; Oh, Kyuseok; Riffel, Rogério; Sartori, Lia F.; Smith, Krista L.; Stern, Daniel; Urry, C. Megan

BASS. XXXV. The M BH–σ* Relation of 105 Month Swift-BAT Type 1 AGNs

Reference
management

Bookmarks

Remove from
bookmarks

Share this on Whatsapp

Close

Bookmarks



You can manage bookmarks using lists, please log in to your user account for this.
  • Media type: E-Article
  • Title: BASS. XXXV. The M BH–σ* Relation of 105 Month Swift-BAT Type 1 AGNs
  • Contributor: Caglar, Turgay; Koss, Michael J.; Burtscher, Leonard; Trakhtenbrot, Benny; Erdim, M. Kiyami; Mejía-Restrepo, Julian E.; Ricci, Federica; Powell, Meredith C.; Ricci, Claudio; Mushotzky, Richard; Bauer, Franz E.; Ananna, Tonima T.; Bär, Rudolf E.; Brandl, Bernhard; Brinchmann, Jarle; Harrison, Fiona; Ichikawa, Kohei; Kakkad, Darshan; Oh, Kyuseok; Riffel, Rogério; Sartori, Lia F.; Smith, Krista L.; Stern, Daniel; Urry, C. Megan
  • imprint: American Astronomical Society, 2023
  • Published in: The Astrophysical Journal
  • Language: Not determined
  • DOI: 10.3847/1538-4357/acf11b
  • ISSN: 0004-637X; 1538-4357
  • Keywords: Space and Planetary Science ; Astronomy and Astrophysics
  • Origination:
  • Footnote:
  • Description: <jats:title>Abstract</jats:title> <jats:p>We present two independent measurements of stellar velocity dispersions (<jats:italic>σ</jats:italic> <jats:sub>⋆</jats:sub>) from the Ca <jats:sc>ii</jats:sc> H+K <jats:italic>λ</jats:italic>3969, 3934 and Mg <jats:sc>i</jats:sc> <jats:italic>b</jats:italic> <jats:italic>λ</jats:italic> 5183, 5172, 5167 region (3880–5550 Å) and the calcium triplet region (8350–8750 Å) for 173 hard X-ray-selected Type 1 active galactic nuclei (AGNs; <jats:italic>z</jats:italic> ≤ 0.08) from the 105 month Swift-BAT catalog. We construct one of the largest samples of local Type 1 AGNs that have both single-epoch <jats:italic>virial</jats:italic> black hole mass (<jats:italic>M</jats:italic> <jats:sub>BH</jats:sub>) estimates and <jats:italic>σ</jats:italic> <jats:sub>⋆</jats:sub> measurements obtained from high spectral resolution data, allowing us to test the usage of such methods for supermassive black hole studies. We find that the two independent <jats:italic>σ</jats:italic> <jats:sub>⋆</jats:sub> measurements are highly consistent with each other, with an average offset of only 0.002 ± 0.001 dex. Comparing <jats:italic>M</jats:italic> <jats:sub>BH</jats:sub> estimates based on broad emission lines and stellar velocity dispersion measurements, we find that the former is systematically lower by ≈0.12 dex. Consequently, Eddington ratios estimated through broad-line <jats:italic>M</jats:italic> <jats:sub>BH</jats:sub> determinations are similarly biased (but in the opposite way). We argue that the discrepancy is driven by extinction in the broad-line region. We also find an anticorrelation between the offset from the <jats:italic>M</jats:italic> <jats:sub>BH</jats:sub>–<jats:italic>σ</jats:italic> <jats:sub>⋆</jats:sub> relation and the Eddington ratio. Our sample of Type 1 AGNs shows a shallower <jats:italic>M</jats:italic> <jats:sub>BH</jats:sub>–<jats:italic>σ</jats:italic> <jats:sub>⋆</jats:sub> relation (with a power-law exponent of ≈3.5) compared with that of inactive galaxies (with a power-law exponent of ≈4.5), confirming earlier results obtained from smaller samples.</jats:p>
  • Access State: Open Access