SIMBAD references

2024A&A...691A.114M - Astronomy and Astrophysics, volume 691A114 (2024/11-1)

The M•-σe relation for local type 1 AGNs and quasars.

MOLINA J., HO L.C. and KNUDSEN K.K.

Abstract (from CDS):

We analyzed Multi Unit Spectroscopic Explorer observations of 42 local z ≲ 0.1 type 1 active galactic nucleus (AGN) host galaxies taken from the Palomar-Green quasar sample and the close AGN reference survey. Our goal was to study the relation between the black hole mass (M•) and bulge stellar velocity dispersion (σe) for type 1 active galaxies. The sample spans black hole masses of 106.0 - 109.2 M⊙, bolometric luminosities of 1042.9 - 1046.0 erg s–1, and Eddington ratios of 0.006 - 1.2. We avoided AGN emission by extracting the spectra over annular apertures. We modeled the calcium triplet stellar features and measured stellar velocity dispersions of σ* = 60 - 230 km s–1 for the host galaxies. We find stellar velocity dispersion values in agreement with previous measurements for local (z ≲ 0.1) AGN host galaxies, but slightly lower compared with those reported for nearby X-ray-selected type 2 quasars. Using a novel annular aperture correction recipe to estimate σe from σ* that considers the bulge morphology and observation beam-smearing, we estimate flux-weighted σe = 60 - 250 km s–1. If we consider the bulge type when estimating M•, we find no statistical difference between the distributions of AGN hosts and the inactive galaxies on the M•-σe plane for M• ≲ 108 M⊙. Conversely, if we do not consider the bulge type when computing M•, we find that both distributions disagree. We find no correlation between the degree of offset from the M•-σe relation and Eddington ratio for M• ≲ 108 M⊙. The current statistics preclude firm conclusions from being drawn for the high-mass range. We argue these observations support notions that a significant fraction of the local type 1 AGNs and quasars have undermassive black holes compared with their host galaxy bulge properties.

Abstract Copyright: © The Authors 2024

Journal keyword(s): galaxies: active

Simbad objects: 46

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2024A&A...691A.114M and select 'bookmark this link' or equivalent in the popup menu