Infrared Extinction in the Inner Milky Way through Red Clump Giants

Bibcode
2014ApJ...782...86G
DOI
10.1088/0004-637X/782/2/86
Hammersley, P. L.; Cabrera-Lavers, A.; Garzón, F.; Asensio Ramos, A.; González-Fernández, C.
Bibliographical reference

The Astrophysical Journal, Volume 782, Issue 2, article id. 86, 11 pp. (2014).

Advertised on:
2
2014
Journal
The Astrophysical Journal
Number of authors
5
IAC number of authors
5
Citations
11
Refereed citations
10
Description
While the shape of the extinction curve in the infrared is considered to be set and the extinction ratios between infrared bands are usually taken to be approximately constant, a number of recent studies point to either a spatially variable behavior of the exponent of the power law or a different extinction law altogether. In this paper, we propose a method to analyze the overall behavior of the interstellar extinction by means of the red-clump population, and we apply it to those areas of the Milky Way where the presence of interstellar matter is heavily felt: areas located in 5° < l < 30° and b = 0°. We show that the extinction ratios traditionally used for the near infrared could be inappropriate for the inner Galaxy and we analyze the behavior of the extinction law from 1 μm to 8 μm.
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Type
Refereed
Techniques
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