Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

LLAMA: nuclear stellar properties of Swift-BAT AGN and matched inactive galaxies

Lin, M-Y, Davies, RI, Hicks, EKS, Burtscher, L, Contursi, A, Genzel, R, Koss, M, Lutz, D, Maciejewski, W, Müller-Sánchez, F, Orban de Xivry, G, Ricci, C, Riffel, R, Riffel, RA, Rosario, D, Schartmann, M, Schnorr-Müller, A, Shimizu, T, Sternberg, A, Sturm, E , Storchi-Bergmann, T, Tacconi, L and Veilleux, S (2017) LLAMA: nuclear stellar properties of Swift-BAT AGN and matched inactive galaxies. Monthly Notices of the Royal Astronomical Society, 473 (4). pp. 4582-4611. ISSN 0035-8711

[img]
Preview
Text
LLAMA nuclear stellar properties of Swift-BAT AGN and matched inactive galaxies.pdf - Published Version

Download (10MB) | Preview
Open Access URL: https://arxiv.org/pdf/1710.04098.pdf (Accepted version)

Abstract

In a complete sample of local 14–195 keV selected active galactic nuclei (AGNs) and inactive galaxies, matched by their host galaxy properties, we study the spatially resolved stellar kinematics and luminosity distributions at near-infrared wavelengths on scales of 10–150 pc, using SINFONI on the VLT. In this paper, we present the first half of the sample, which comprises 13 galaxies, eight AGNs and five inactive galaxies. The stellar velocity fields show a disc-like rotating pattern, for which the kinematic position angle is in agreement with the photometric position angle obtained from large scale images. For this set of galaxies, the stellar surface brightness of the inactive galaxy sample is generally comparable to the matched sample of AGN, but extends to lower surface brightness. After removal of the bulge contribution, we find a nuclear stellar light excess with an extended nuclear disc structure, which exhibits a size-luminosity relation. While we expect the excess luminosity to be associated with a dynamically cooler young stellar population, we do not typically see a matching drop in dispersion. This may be because these galaxies have pseudo-bulges in which the intrinsic dispersion increases towards the centre. And although the young stars may have an impact in the observed kinematics, their fraction is too small to dominate over the bulge and compensate the increase in dispersion at small radii, so no dispersion drop is seen. Finally, we find no evidence for a difference in the stellar kinematics and nuclear stellar luminosity excess between these active and inactive galaxies.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Date Deposited: 01 Feb 2018 09:52
Last Modified: 01 Feb 2018 09:52
DOI or Identification number: 10.1093/mnras/stx2618
URI: http://researchonline.ljmu.ac.uk/id/eprint/7921

Actions (login required)

View Item View Item