1595 Kaviraj.pdf (1.27 MB)
Download fileRadio AGN in spiral galaxies
journal contribution
posted on 2023-05-18, 12:33 authored by Kaviraj, S, Stanislav ShabalaStanislav Shabala, Deller, AT, Middelberg, ERadio AGN in the nearby Universe are more likely to be found in galaxies with early- type morphology, the detection rate in spiral or late-type galaxies (LTGs) being around an order of magnitude lower. We combine the mJy Imaging VLBA Exploration at 20cm (mJIVE-20) survey with the Sloan Digital Sky Survey (SDSS), to study the relatively rare population of AGN in LTGs that have nuclear radio luminosities similar to that in their early-type counterparts. The LTG AGN population is preferentially hosted by galaxies that have high stellar masses (M∗ > 1010.8 MO), red colours and low star-formation rates, with little dependence on the detailed morphology or local environment of the host LTG. The merger fraction in the LTG AGN is ~4 times higher than that in the general LTG population, indicating that merging is an important trigger for radio AGN in these systems. The red colours of our systems extend recent work which indicates that merger-triggered AGN in the nearby Universe appear after the peak of the associated starburst, implying that they do not strongly regulate star formation. Finally, we find that in systems where parsec-scale jets are clearly observed in our VLBI images, the jets are perpendicular to the major axis of the galaxy, indicating strong alignment between the accretion disc and the host galaxy stellar disc.
Funding
Australian Research Council
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
454Pagination
1595-1604ISSN
0035-8711Department/School
School of Natural SciencesPublisher
Blackwell Publishing LtdPlace of publication
9600 Garsington Rd, Oxford, England, Oxon, Ox4 2DgRights statement
Copyright 2015 The AuthorsRepository Status
- Open