The role of the host galaxy kinematics on nuclear activity

G. Dumas, C. G. Mundell, E. Emsellem, N. Nagar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). In both active and non-active galaxies, the stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to nuclear activity (e.g., AGN-driven outflows) in the case of the Seyfert galaxies, the ionised gas kinematics in both populations is dominated by rotation. The non-active galaxies present a global alignment between stellar and gaseous kinematics while majority of Seyfert galaxies present strong kinematics misalignments between the two components. A more refined analysis of our two-dimensional kinematics maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields. These deviations are moreover stronger in the case of Seyfert galaxies than their associated non-active galaxies. This result suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between nuclear activity and the host galaxy dynamics in these regions.

Original languageEnglish
Pages (from-to)908-911
Number of pages4
JournalAstronomische Nachrichten
Volume329
Issue number9-10
DOIs
Publication statusPublished - 1 Dec 2008

Fingerprint

Seyfert galaxies
kinematics
galaxies
ionized gases
velocity distribution
deviation
active galaxies
gas
misalignment
symmetry
outflow
alignment
perturbation
telescopes
stars
gases

Keywords

  • Galaxies: active
  • Galaxies: kinematics and dynamics
  • Galaxies: Seyfert
  • ISM: kinematics and dynamics
  • Stars: kinematics

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

The role of the host galaxy kinematics on nuclear activity. / Dumas, G.; Mundell, C. G.; Emsellem, E.; Nagar, N.

In: Astronomische Nachrichten, Vol. 329, No. 9-10, 01.12.2008, p. 908-911.

Research output: Contribution to journalArticle

Dumas, G. ; Mundell, C. G. ; Emsellem, E. ; Nagar, N. / The role of the host galaxy kinematics on nuclear activity. In: Astronomische Nachrichten. 2008 ; Vol. 329, No. 9-10. pp. 908-911.
@article{b68ab3b7e3ab4911807cb2673d112e09,
title = "The role of the host galaxy kinematics on nuclear activity",
abstract = "We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). In both active and non-active galaxies, the stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to nuclear activity (e.g., AGN-driven outflows) in the case of the Seyfert galaxies, the ionised gas kinematics in both populations is dominated by rotation. The non-active galaxies present a global alignment between stellar and gaseous kinematics while majority of Seyfert galaxies present strong kinematics misalignments between the two components. A more refined analysis of our two-dimensional kinematics maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields. These deviations are moreover stronger in the case of Seyfert galaxies than their associated non-active galaxies. This result suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between nuclear activity and the host galaxy dynamics in these regions.",
keywords = "Galaxies: active, Galaxies: kinematics and dynamics, Galaxies: Seyfert, ISM: kinematics and dynamics, Stars: kinematics",
author = "G. Dumas and Mundell, {C. G.} and E. Emsellem and N. Nagar",
year = "2008",
month = "12",
day = "1",
doi = "10.1002/asna.200811046",
language = "English",
volume = "329",
pages = "908--911",
journal = "Astronomische Nachrichten",
issn = "0004-6337",
publisher = "Wiley",
number = "9-10",

}

TY - JOUR

T1 - The role of the host galaxy kinematics on nuclear activity

AU - Dumas, G.

AU - Mundell, C. G.

AU - Emsellem, E.

AU - Nagar, N.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). In both active and non-active galaxies, the stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to nuclear activity (e.g., AGN-driven outflows) in the case of the Seyfert galaxies, the ionised gas kinematics in both populations is dominated by rotation. The non-active galaxies present a global alignment between stellar and gaseous kinematics while majority of Seyfert galaxies present strong kinematics misalignments between the two components. A more refined analysis of our two-dimensional kinematics maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields. These deviations are moreover stronger in the case of Seyfert galaxies than their associated non-active galaxies. This result suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between nuclear activity and the host galaxy dynamics in these regions.

AB - We investigate the kinematic properties of the stars and ionised gas in the circumnuclear regions of a matched sample of nearby Seyfert and non-active galaxies, using the SAURON Integral-Field Unit (IFU) on the William Herschel Telescope (WHT). In both active and non-active galaxies, the stellar velocity fields present regular rotation patterns. After removal of the non-gravitational components due to nuclear activity (e.g., AGN-driven outflows) in the case of the Seyfert galaxies, the ionised gas kinematics in both populations is dominated by rotation. The non-active galaxies present a global alignment between stellar and gaseous kinematics while majority of Seyfert galaxies present strong kinematics misalignments between the two components. A more refined analysis of our two-dimensional kinematics maps reveal evidence for deviations from axial-symmetry in the gaseous velocity fields. These deviations are moreover stronger in the case of Seyfert galaxies than their associated non-active galaxies. This result suggests the presence of weak dynamical perturbations in the circumnuclear regions of Seyfert galaxies and provides a tentative link between nuclear activity and the host galaxy dynamics in these regions.

KW - Galaxies: active

KW - Galaxies: kinematics and dynamics

KW - Galaxies: Seyfert

KW - ISM: kinematics and dynamics

KW - Stars: kinematics

UR - http://www.scopus.com/inward/record.url?scp=57149143601&partnerID=8YFLogxK

U2 - 10.1002/asna.200811046

DO - 10.1002/asna.200811046

M3 - Article

VL - 329

SP - 908

EP - 911

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

SN - 0004-6337

IS - 9-10

ER -