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Optical and near-infrared velocity dispersions of early-type galaxies

Joachim Vanderbeke, Maarten Baes UGent, Aaron J Romanowsky and Linda Schmidtobreick (2011) MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 412(3). p.2017-2025
abstract
We have carried out a systematic, homogeneous comparison of optical and near-infrared dispersions. Our magnitude-limited sample of early-type galaxies (ETGs) in the Fornax cluster comprises 11 elliptical and 11 lenticular galaxies more luminous than M-B = -17. We were able to determine the central dispersions based on the near-infrared CO absorption band head for 19 of those galaxies. The velocity dispersions range from less than 70 km s-1 to over 400 km s-1. We compare our near-infrared velocity dispersions to the optical dispersions measured by <link rid="b32">Kuntschner. Contrary to previous studies, we find a one-to-one correspondence with a median fractional difference of 6.4 per cent. We examine the correlation between the relative dust mass and the fractional difference of the velocity dispersions, but find no significant trend. Our results suggest that early-type galaxies are largely optically thin, which is consistent with recent Herschel observations.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
LOCAL UNIVERSE, galaxies: clusters: individual: Fornax, COLOR GRADIENTS, VIRGO CLUSTER, FORNAX CLUSTER, STELLAR POPULATIONS, FUNDAMENTAL PLANE, SUPERMASSIVE BLACK-HOLES, DIFFUSE DUST COMPONENT, ELLIPTIC GALAXIES, TO-LIGHT RATIO, galaxies: elliptical and lenticular, cD, galaxies: kinematics and dynamics
journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Mon. Not. Roy. Astron. Soc.
volume
412
issue
3
pages
2017 - 2025
Web of Science type
Article
Web of Science id
000289159100046
JCR category
ASTRONOMY & ASTROPHYSICS
JCR impact factor
4.9 (2011)
JCR rank
9/56 (2011)
JCR quartile
1 (2011)
ISSN
0035-8711
DOI
10.1111/j.1365-2966.2010.18036.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1240887
handle
http://hdl.handle.net/1854/LU-1240887
date created
2011-05-25 13:05:49
date last changed
2016-12-19 15:42:48
@article{1240887,
  abstract     = {We have carried out a systematic, homogeneous comparison of optical and near-infrared dispersions. Our magnitude-limited sample of early-type galaxies (ETGs) in the Fornax cluster comprises 11 elliptical and 11 lenticular galaxies more luminous than M-B = -17. We were able to determine the central dispersions based on the near-infrared CO absorption band head for 19 of those galaxies. The velocity dispersions range from less than 70 km s-1 to over 400 km s-1. We compare our near-infrared velocity dispersions to the optical dispersions measured by {\textlangle}link rid={\textacutedbl}b32{\textacutedbl}{\textrangle}Kuntschner. Contrary to previous studies, we find a one-to-one correspondence with a median fractional difference of 6.4 per cent. We examine the correlation between the relative dust mass and the fractional difference of the velocity dispersions, but find no significant trend. Our results suggest that early-type galaxies are largely optically thin, which is consistent with recent Herschel observations.},
  author       = {Vanderbeke, Joachim and Baes, Maarten and Romanowsky, Aaron J and Schmidtobreick, Linda},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keyword      = {LOCAL UNIVERSE,galaxies: clusters: individual: Fornax,COLOR GRADIENTS,VIRGO CLUSTER,FORNAX CLUSTER,STELLAR POPULATIONS,FUNDAMENTAL PLANE,SUPERMASSIVE BLACK-HOLES,DIFFUSE DUST COMPONENT,ELLIPTIC GALAXIES,TO-LIGHT RATIO,galaxies: elliptical and lenticular,cD,galaxies: kinematics and dynamics},
  language     = {eng},
  number       = {3},
  pages        = {2017--2025},
  title        = {Optical and near-infrared velocity dispersions of early-type galaxies},
  url          = {http://dx.doi.org/10.1111/j.1365-2966.2010.18036.x},
  volume       = {412},
  year         = {2011},
}

Chicago
Vanderbeke, Joachim, Maarten Baes, Aaron J Romanowsky, and Linda Schmidtobreick. 2011. “Optical and Near-infrared Velocity Dispersions of Early-type Galaxies.” Monthly Notices of the Royal Astronomical Society 412 (3): 2017–2025.
APA
Vanderbeke, J., Baes, M., Romanowsky, A. J., & Schmidtobreick, L. (2011). Optical and near-infrared velocity dispersions of early-type galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 412(3), 2017–2025.
Vancouver
1.
Vanderbeke J, Baes M, Romanowsky AJ, Schmidtobreick L. Optical and near-infrared velocity dispersions of early-type galaxies. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2011;412(3):2017–25.
MLA
Vanderbeke, Joachim, Maarten Baes, Aaron J Romanowsky, et al. “Optical and Near-infrared Velocity Dispersions of Early-type Galaxies.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 412.3 (2011): 2017–2025. Print.