Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission

V. Ramakrishnan, N. M. Nagar, C. Finlez, T. Storchi-Bergmann, R. Slater, A. Schnorr-Müller, R. A. Riffel, C. G. Mundell, A. Robinson

Research output: Contribution to journalArticle

4 Downloads (Pure)

Abstract

We present the molecular gas morphology and kinematics of seven nearby Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1 kinematics within the inner $\sim30$" ($\lesssim9$~kpc) reveals rotation patterns that have been explored using the Bertola rotation model and a modified version of the Kinemetry package. The latter algorithm reveals various deviations from pure circular rotation in the inner kiloparsec of all seven galaxies, including kinematic twists, decoupled and counter-rotating cores. A comparison of the global molecular gas and stellar kinematics show overall agreement in the position angle of the major axis and the systemic velocity, but larger discrepancies in the disc inclination. The residual maps obtained with both the methods shows the presence of non-circular motions in most of the galaxies. Despite its importance, a detailed interpretation of the physics responsible for non-circular motions will be discussed in a forthcoming work.
Original languageEnglish
Article numberstz1244
Pages (from-to)444-455
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Early online date4 May 2019
DOIs
Publication statusE-pub ahead of print - 4 May 2019

Keywords

  • astro-ph.GA
  • astro-ph.SR

Cite this

Ramakrishnan, V., Nagar, N. M., Finlez, C., Storchi-Bergmann, T., Slater, R., Schnorr-Müller, A., ... Robinson, A. (2019). Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission. Monthly Notices of the Royal Astronomical Society, 444-455. [stz1244]. https://doi.org/10.1093/mnras/stz1244

Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission. / Ramakrishnan, V.; Nagar, N. M.; Finlez, C.; Storchi-Bergmann, T.; Slater, R.; Schnorr-Müller, A.; Riffel, R. A.; Mundell, C. G.; Robinson, A.

In: Monthly Notices of the Royal Astronomical Society, 04.05.2019, p. 444-455.

Research output: Contribution to journalArticle

Ramakrishnan, V. ; Nagar, N. M. ; Finlez, C. ; Storchi-Bergmann, T. ; Slater, R. ; Schnorr-Müller, A. ; Riffel, R. A. ; Mundell, C. G. ; Robinson, A. / Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission. In: Monthly Notices of the Royal Astronomical Society. 2019 ; pp. 444-455.
@article{fdbbcb693aa84bafa0ec897bb6eae76a,
title = "Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission",
abstract = "We present the molecular gas morphology and kinematics of seven nearby Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1 kinematics within the inner $\sim30${"} ($\lesssim9$~kpc) reveals rotation patterns that have been explored using the Bertola rotation model and a modified version of the Kinemetry package. The latter algorithm reveals various deviations from pure circular rotation in the inner kiloparsec of all seven galaxies, including kinematic twists, decoupled and counter-rotating cores. A comparison of the global molecular gas and stellar kinematics show overall agreement in the position angle of the major axis and the systemic velocity, but larger discrepancies in the disc inclination. The residual maps obtained with both the methods shows the presence of non-circular motions in most of the galaxies. Despite its importance, a detailed interpretation of the physics responsible for non-circular motions will be discussed in a forthcoming work.",
keywords = "astro-ph.GA, astro-ph.SR",
author = "V. Ramakrishnan and Nagar, {N. M.} and C. Finlez and T. Storchi-Bergmann and R. Slater and A. Schnorr-M{\"u}ller and Riffel, {R. A.} and Mundell, {C. G.} and A. Robinson",
note = "28 pages in total, 20 figures, 4 tables. Accepted for publication in MNRAS",
year = "2019",
month = "5",
day = "4",
doi = "10.1093/mnras/stz1244",
language = "English",
pages = "444--455",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",

}

TY - JOUR

T1 - Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission

AU - Ramakrishnan, V.

AU - Nagar, N. M.

AU - Finlez, C.

AU - Storchi-Bergmann, T.

AU - Slater, R.

AU - Schnorr-Müller, A.

AU - Riffel, R. A.

AU - Mundell, C. G.

AU - Robinson, A.

N1 - 28 pages in total, 20 figures, 4 tables. Accepted for publication in MNRAS

PY - 2019/5/4

Y1 - 2019/5/4

N2 - We present the molecular gas morphology and kinematics of seven nearby Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1 kinematics within the inner $\sim30$" ($\lesssim9$~kpc) reveals rotation patterns that have been explored using the Bertola rotation model and a modified version of the Kinemetry package. The latter algorithm reveals various deviations from pure circular rotation in the inner kiloparsec of all seven galaxies, including kinematic twists, decoupled and counter-rotating cores. A comparison of the global molecular gas and stellar kinematics show overall agreement in the position angle of the major axis and the systemic velocity, but larger discrepancies in the disc inclination. The residual maps obtained with both the methods shows the presence of non-circular motions in most of the galaxies. Despite its importance, a detailed interpretation of the physics responsible for non-circular motions will be discussed in a forthcoming work.

AB - We present the molecular gas morphology and kinematics of seven nearby Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1 kinematics within the inner $\sim30$" ($\lesssim9$~kpc) reveals rotation patterns that have been explored using the Bertola rotation model and a modified version of the Kinemetry package. The latter algorithm reveals various deviations from pure circular rotation in the inner kiloparsec of all seven galaxies, including kinematic twists, decoupled and counter-rotating cores. A comparison of the global molecular gas and stellar kinematics show overall agreement in the position angle of the major axis and the systemic velocity, but larger discrepancies in the disc inclination. The residual maps obtained with both the methods shows the presence of non-circular motions in most of the galaxies. Despite its importance, a detailed interpretation of the physics responsible for non-circular motions will be discussed in a forthcoming work.

KW - astro-ph.GA

KW - astro-ph.SR

U2 - 10.1093/mnras/stz1244

DO - 10.1093/mnras/stz1244

M3 - Article

SP - 444

EP - 455

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

M1 - stz1244

ER -