2010MNRAS.409..727F

Query : 2010MNRAS.409..727F

2010MNRAS.409..727F - Mon. Not. R. Astron. Soc., 409, 727-736 (2010/December-1)

Determining the extragalactic extinction law with SALT - II. Additional sample.

FINKELMAN I., BROSCH N., KNIAZEV A.Y., VAISANEN P., BUCKLEY D.A.H., O'DONOGHUE D., GULBIS A., HASHIMOTO Y., LOARING N., ROMERO-COLMENERO E. and SEFAKO R.

Abstract (from CDS):

We present new results from an ongoing programme to study the dust extragalactic extinction law in E/S0 galaxies with dust lanes with the Southern African Large Telescope (SALT) during its performance verification phase. The wavelength dependence of the dust extinction for seven galaxies is derived in six spectral bands ranging from the near-ultraviolet atmospheric cut-off to the near-infrared. The derivation of an extinction law is performed by fitting model galaxies to the unextinguished parts of the image in each spectral band, and subtracting from these the actual images. We compare our results with the derived extinction law in the Galaxy and find them to run parallel to the Galactic extinction curve with a mean total-to-selective extinction value of RV = 2.71±0.43. We use total optical extinction values to estimate the dust mass for each galaxy, compare these with dust masses derived from IRAS measurements, and find them to range from 104 to 107 M☉. We study the case of the well-known dust-lane galaxy NGC2685 for which Hubble Space Telescope/Wide Field Planetary Camera 2 (HST/WFPC2) data are available to test the dust distribution on different scales. Our results imply a scale-free dust distribution across the dust lanes, at least within ∼1arcsec (∼60 pc) regions.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): dust, extinction - galaxies: elliptical and lenticular, cD - galaxies: ISM

Simbad objects: 15

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Number of rows : 15
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 AM 0052-321 PaG 00 54 55.5 -32 01 31           ~ 5 0
2 2MASX J01331905-3626399 GiG 01 33 19.0432911984 -36 26 40.659110736           ~ 4 0
3 NGC 612 Sy2 01 33 57.751 -36 29 35.80   13.90 13.15 12.33   ~ 232 0
4 ESO 355-8 AG? 02 21 18.85 -34 19 07.7   16.00 14.83 14.13 13.43 ~ 14 0
5 ESO 118-19 EmG 04 18 59.5061584608 -58 15 27.108644688   16.55 15.51 14.83 14.07 ~ 22 0
6 NGC 1947 GiG 05 26 47.613 -63 45 36.08   11.76 10.80 10.06   ~ 132 0
7 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 430 1
8 NGC 3302 Sy2 10 35 47.4504855552 -32 21 30.619001520   13.51   11.61   ~ 28 0
9 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 289 0
10 M 104 LIN 12 39 59.43185902 -11 37 22.9961800 9.51 9.55 8.00 8.05   ~ 1396 3
11 NGC 4753 GiG 12 52 22.112 -01 11 58.88 11.26 10.85 9.95     ~ 274 1
12 ESO 269-58 AG? 13 10 32.8047 -46 59 37.747   12.50   11.31   ~ 72 0
13 NGC 5266 Sy2 13 43 02.0849196792 -48 10 10.000751592   11.89 11.14 11.9 11.3 ~ 163 0
14 NGC 5363 GiP 13 56 07.20 +05 15 17.3 12.59 12.12 10.51     ~ 227 0
15 ESO 447-37 AG? 14 47 26.6891985336 -30 38 42.990193104   14.71   13.17   ~ 21 0

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