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A Galactic Plane relative extinction map from 2MASS

Froebrich, Dirk, Ray, T.P., Murphy, G.C., Scholz, Alexander (2005) A Galactic Plane relative extinction map from 2MASS. Astronomy & Astrophysics, 432 (3). L67-L70. ISSN 0004-6361. (doi:10.1051/0004-6361:200500016) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1051/0004-6361:200500016

Abstract

We present three 14 400 square degree relative extinction maps of the Galactic Plane (\b\ < 20°) obtained from 2MASS using accumulative star counts (Wolf diagrams). This method is independent of the colour of the stars and the variation of extinction with wavelength. Stars were counted in 3.'5�3.'5 boxes, every 20". 1° � 1° surrounding fields were chosen for reference, hence the maps represent local extinction enhancements and ignore any contribution from the ISM or very large clouds. Data reduction was performed on a Beowulf-type cluster (in approximately 120 hours). Such a cluster is ideal for this type of work as areas of the sky can be independently processed in parallel. We studied how extinction depends on wavelength in all of the high extinction regions detected and within selected dark clouds. On average a power law opacity index (β) of 1.0 to 1.8 in the NIR was deduced. The index however differed significantly from region to region and even within individual dark clouds. That said, generally it was found to be constant, or to increase, with wavelength within a particular region. © ESO 2005.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361:200500016
Uncontrolled keywords: Infrared: ISM, ISM: Dust, extinction, Methods: Miscellaneous,
Subjects: Q Science > QB Astronomy
Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 17 Jul 2015 14:27 UTC
Last Modified: 29 May 2019 14:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49578 (The current URI for this page, for reference purposes)
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