Disk mass and disk heating in the spiral galaxy NGC 3223

G. Gentile, C. Tydtgat, M. Baes, G. De Geyter, M. Koleva, G. W. Angus, W. J.G. De Blok, W. Saftly, S. Viaene

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of σzR = 1.21 ± 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed.

Original languageEnglish
Article numberA57
JournalAstronomy and Astrophysics
Volume576
DOIs
Publication statusPublished - Apr 1 2015

Fingerprint

mass to light ratios
spiral galaxies
stellar mass
heating
dark matter
radial velocity
photometry
density distribution
kinematics
galaxies
radii
curves
synthesis
prediction
predictions
distribution

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Gentile, G., Tydtgat, C., Baes, M., De Geyter, G., Koleva, M., Angus, G. W., ... Viaene, S. (2015). Disk mass and disk heating in the spiral galaxy NGC 3223. Astronomy and Astrophysics, 576, [A57]. https://doi.org/10.1051/0004-6361/201425279
Gentile, G. ; Tydtgat, C. ; Baes, M. ; De Geyter, G. ; Koleva, M. ; Angus, G. W. ; De Blok, W. J.G. ; Saftly, W. ; Viaene, S. / Disk mass and disk heating in the spiral galaxy NGC 3223. In: Astronomy and Astrophysics. 2015 ; Vol. 576.
@article{d11ac655cd014ccfa7dd4572266db4d5,
title = "Disk mass and disk heating in the spiral galaxy NGC 3223",
abstract = "We present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of σz/σR = 1.21 ± 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed.",
author = "G. Gentile and C. Tydtgat and M. Baes and {De Geyter}, G. and M. Koleva and Angus, {G. W.} and {De Blok}, {W. J.G.} and W. Saftly and S. Viaene",
year = "2015",
month = "4",
day = "1",
doi = "10.1051/0004-6361/201425279",
language = "English",
volume = "576",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

Gentile, G, Tydtgat, C, Baes, M, De Geyter, G, Koleva, M, Angus, GW, De Blok, WJG, Saftly, W & Viaene, S 2015, 'Disk mass and disk heating in the spiral galaxy NGC 3223', Astronomy and Astrophysics, vol. 576, A57. https://doi.org/10.1051/0004-6361/201425279

Disk mass and disk heating in the spiral galaxy NGC 3223. / Gentile, G.; Tydtgat, C.; Baes, M.; De Geyter, G.; Koleva, M.; Angus, G. W.; De Blok, W. J.G.; Saftly, W.; Viaene, S.

In: Astronomy and Astrophysics, Vol. 576, A57, 01.04.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Disk mass and disk heating in the spiral galaxy NGC 3223

AU - Gentile, G.

AU - Tydtgat, C.

AU - Baes, M.

AU - De Geyter, G.

AU - Koleva, M.

AU - Angus, G. W.

AU - De Blok, W. J.G.

AU - Saftly, W.

AU - Viaene, S.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - We present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of σz/σR = 1.21 ± 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed.

AB - We present the stellar and gaseous kinematics of an Sb galaxy, NGC 3223, with the aim of determining the vertical and radial stellar velocity dispersion as a function of radius, which can help to constrain disk heating theories. Together with the observed NIR photometry, the vertical velocity dispersion is also used to determine the stellar mass-to-light (M/L) ratio, typically one of the largest uncertainties when deriving the dark matter distribution from the observed rotation curve. We find a vertical-to-radial velocity dispersion ratio of σz/σR = 1.21 ± 0.14, significantly higher than expectations from known correlations, and a weakly-constrained Ks-band stellar M/L ratio in the range 0.5-1.7, which is at the high end of (but consistent with) the predictions of stellar population synthesis models. Such a weak constraint on the stellar M/L ratio, however, does not allow us to securely determine the dark matter density distribution. To achieve this, either a statistical approach or additional data (e.g. integral-field unit) are needed.

UR - http://www.scopus.com/inward/record.url?scp=84961291265&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961291265&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201425279

DO - 10.1051/0004-6361/201425279

M3 - Article

AN - SCOPUS:84961291265

VL - 576

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A57

ER -