2001ApJ...548..296W


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.06CET01:03:36

2001ApJ...548..296W - Astrophys. J., 548, 296-309 (2001/February-2)

Dust grain-size distributions and extinction in the Milky Way, Large Magellanic Cloud, and Small Magellanic Cloud.

WEINGARTNER J.C. and DRAINE B.T.

Abstract (from CDS):

We construct size distributions for carbonaceous and silicate grain populations in different regions of the Milky Way, LMC, and SMC. The size distributions include sufficient very small carbonaceous grains (including polycyclic aromatic hydrocarbon molecules) to account for the observed infrared and microwave emission from the diffuse interstellar medium. Our distributions reproduce the observed extinction of starlight, which varies depending on the interstellar environment through which the light travels. As shown by Cardelli, Clayton, and Mathis in 1989, these variations can be roughly parameterized by the ratio of visual extinction to reddening, RV. We adopt a fairly simple functional form for the size distribution, characterized by several parameters. We tabulate these parameters for various combinations of values for RV and bC, the C abundance in very small grains. We also find size distributions for the line of sight to HD 210121 and for sight lines in the LMC and SMC. For several size distributions, we evaluate the albedo and scattering asymmetry parameter and present model extinction curves extending beyond the Lyman limit.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - ISM: Clouds

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9710 1
2 AzV 398 s*b 01 06 09.8133816421 -71 56 00.746563020 13.15 13.94 13.98   13.71 O9.7Ia 41 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15214 1
4 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 170 0
5 GCIRS 3 * 17 45 39.80 -29 00 23.9           ~ 141 0
6 GCIRS 7 * 17 45 39.987 -29 00 22.24           M2 350 0
7 HD 210121 * 22 08 11.9025501667 -03 31 52.770012247   7.84 7.68     B7II 155 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001ApJ...548..296W and select 'bookmark this link' or equivalent in the popup menu


2021.03.06-01:03:36

© Université de Strasbourg/CNRS

    • Contact