2007A&A...471..765B


Query : 2007A&A...471..765B

2007A&A...471..765B - Astronomy and Astrophysics, volume 471, 765-773 (2007/9-1)

The dust distribution in edge-on galaxies. Radiative transfer fits of V and K'-band images.

BIANCHI S.

Abstract (from CDS):

I have analyzed a sample of seven nearby edge-on galaxies observed in the V and K'-bands, in order to infer the properties of the dust distribution. A radiative transfer model, including scattering, was used to decompose each image into a stellar disk, a bulge, and a dust disk. The parameters describing the distributions were obtained through standard χ2 minimization techniques. The dust disks fitted to the V-band images are consistent with previous work in the literature: the radial scalelength of dust is larger than for stars (hd/hs∼1.5); the dust disk has a smaller vertical scalelength than the stellar (zd/zs∼1/3); the dust disk is almost transparent when seen face-on (central, face-on, optical depth τ0=0.5-1.5). Equivalent fits can be produced using faster radiative transfer models that neglect scattering. In the K'-band, no trace is found of a second, massive, dust disk, which has been invoked to explain observations of dust emission in the submillimeter. I discuss the model degeneracies and the effect of complex structures on the fitted distributions. In particular, most bulges in the sample show a box/peanuts morphology with large residuals; two lower-inclination galaxies show a dust ring distribution, which could be the cause of the large, fitted, dust scalelengths.

Abstract Copyright:

Journal keyword(s): dust, extinction - galaxies: ISM - galaxies: stellar content - galaxies: spiral

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1656 2
2 UGC 4277 AGN 08 13 57.248 +52 38 52.62   14.39 13.53 12.95 12.27 ~ 67 0
3 NGC 4013 GiG 11 58 31.417 +43 56 49.28   12.4       ~ 419 1
4 NGC 4217 GiG 12 15 50.900 +47 05 30.44   12.4       ~ 298 2
5 NGC 4298 GiP 12 21 32.7578814360 +14 36 22.048690716   12.04 11.34     ~ 323 1
6 NGC 4302 GiP 12 21 42.477 +14 35 51.94   13.4 11.61     ~ 324 0
7 NGC 5529 GiP 14 15 34.226 +36 13 37.12   12.9       ~ 155 2
8 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 355 0
9 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 758 1
10 NGC 5965 LIN 15 34 02.3002830024 +56 41 08.509684740   13.4       ~ 121 0

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