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Herschel/SPIRE observations of the dusty disk of NGC 4244

BW Holwerda, S Bianchi, T Böker, D Radburn-Smith, RS de Jong, Maarten Baes UGent, PC van der Kruit, M Xilouris, Karl Gordon UGent and JJ Dalcanton (2012) ASTRONOMY & ASTROPHYSICS. 541.
abstract
We present Herschel/SPIRE images at 250, 350, and 500 mu m of NGC 4244, a typical low-mass, disk-only and edge-on spiral galaxy. The dust disk is clumpy and shows signs of truncation at the break radius of the stellar disk. This disk coincides with the densest part of the Hi disk. We compare the spectral energy distribution (SED), including the new SPIRE fluxes, to 3D radiative transfer models; a smooth model disk and a clumpy model with embedded heating. Each model requires a very high value for the dust scale-length (h(d) = 2-5 h(*)), higher dust masses than previous models of NGC 4244 (M-d = 0.47-1.39 x 10(7) M-circle dot) and a face-on optical depth of tau(f.o.)(V) = 0.4-1.12, in agreement with previous disk opacity studies. The vertical scales of stars and dust are similar. The clumpy model much better mimics the general morphology in the sub-mm images and the general SED. The inferred gas-to-dust mass ratio is compatible with those of similar low-mass disks. The relatively large radial scale-length of the dust disk points to radial mixing of the dusty ISM within the stellar disk. The large vertical dust scale and the clumpy dust distribution of our SED model are both consistent with a scenario in which the vertical structure of the ISM is dictated by the balance of turbulence and self-gravity.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
dust, radiative transfer, extinction, ISM: structure, galaxies: ISM, galaxies: spiral, galaxies: structure, SURFACE BRIGHTNESS GALAXIES, TELESCOPE ADVANCED CAMERA, RADIATIVE-TRANSFER CODE, ON SPIRAL GALAXIES, DIGITAL SKY SURVEY, INTERSTELLAR-MEDIUM, ROTATION CURVE, GALACTIC DISK, DIRTY MODEL, H-ALPHA
journal title
ASTRONOMY & ASTROPHYSICS
Astron. Astrophys.
volume
541
article_number
L5
pages
4 pages
Web of Science type
Article
Web of Science id
000304390900173
JCR category
ASTRONOMY & ASTROPHYSICS
JCR impact factor
5.084 (2012)
JCR rank
11/56 (2012)
JCR quartile
1 (2012)
ISSN
0004-6361
DOI
10.1051/0004-6361/201118615
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
3001520
handle
http://hdl.handle.net/1854/LU-3001520
date created
2012-09-28 15:45:34
date last changed
2012-10-02 09:39:44
@article{3001520,
  abstract     = {We present Herschel/SPIRE images at 250, 350, and 500 mu m of NGC 4244, a typical low-mass, disk-only and edge-on spiral galaxy. The dust disk is clumpy and shows signs of truncation at the break radius of the stellar disk. This disk coincides with the densest part of the Hi disk. We compare the spectral energy distribution (SED), including the new SPIRE fluxes, to 3D radiative transfer models; a smooth model disk and a clumpy model with embedded heating. Each model requires a very high value for the dust scale-length (h(d) = 2-5 h(*)), higher dust masses than previous models of NGC 4244 (M-d = 0.47-1.39 x 10(7) M-circle dot) and a face-on optical depth of tau(f.o.)(V) = 0.4-1.12, in agreement with previous disk opacity studies. The vertical scales of stars and dust are similar. The clumpy model much better mimics the general morphology in the sub-mm images and the general SED. The inferred gas-to-dust mass ratio is compatible with those of similar low-mass disks. The relatively large radial scale-length of the dust disk points to radial mixing of the dusty ISM within the stellar disk. The large vertical dust scale and the clumpy dust distribution of our SED model are both consistent with a scenario in which the vertical structure of the ISM is dictated by the balance of turbulence and self-gravity.},
  articleno    = {L5},
  author       = {Holwerda, BW and Bianchi, S and B{\"o}ker, T and Radburn-Smith, D and de Jong, RS and Baes, Maarten and van der Kruit, PC and Xilouris, M and Gordon, Karl and Dalcanton, JJ},
  issn         = {0004-6361},
  journal      = {ASTRONOMY \& ASTROPHYSICS},
  keyword      = {dust,radiative transfer,extinction,ISM: structure,galaxies: ISM,galaxies: spiral,galaxies: structure,SURFACE BRIGHTNESS GALAXIES,TELESCOPE ADVANCED CAMERA,RADIATIVE-TRANSFER CODE,ON SPIRAL GALAXIES,DIGITAL SKY SURVEY,INTERSTELLAR-MEDIUM,ROTATION CURVE,GALACTIC DISK,DIRTY MODEL,H-ALPHA},
  language     = {eng},
  pages        = {4},
  title        = {Herschel/SPIRE observations of the dusty disk of NGC 4244},
  url          = {http://dx.doi.org/10.1051/0004-6361/201118615},
  volume       = {541},
  year         = {2012},
}

Chicago
Holwerda, BW, S Bianchi, T Böker, D Radburn-Smith, RS de Jong, Maarten Baes, PC van der Kruit, M Xilouris, Karl Gordon, and JJ Dalcanton. 2012. “Herschel/SPIRE Observations of the Dusty Disk of NGC 4244.” Astronomy & Astrophysics 541.
APA
Holwerda, B., Bianchi, S., Böker, T., Radburn-Smith, D., de Jong, R., Baes, M., van der Kruit, P., et al. (2012). Herschel/SPIRE observations of the dusty disk of NGC 4244. ASTRONOMY & ASTROPHYSICS, 541.
Vancouver
1.
Holwerda B, Bianchi S, Böker T, Radburn-Smith D, de Jong R, Baes M, et al. Herschel/SPIRE observations of the dusty disk of NGC 4244. ASTRONOMY & ASTROPHYSICS. 2012;541.
MLA
Holwerda, BW, S Bianchi, T Böker, et al. “Herschel/SPIRE Observations of the Dusty Disk of NGC 4244.” ASTRONOMY & ASTROPHYSICS 541 (2012): n. pag. Print.