Skip to main content

Extinction techniques and impact on dust property determination

Froebrich, D., Del Burgo, C. (2006) Extinction techniques and impact on dust property determination. Monthly Notices of the Royal Astronomical Society, 369 (4). pp. 1901-1910. ISSN 0035-8711. (doi:10.1111/j.1365-2966.2006.10436.x) (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://www.scopus.com/inward/record.url?eid=2-s2.0...

Abstract

The near-infrared (NIR) extinction power-law index (β) and its uncertainty is derived from three different techniques based on star counts, colour excess and a combination of them. We have applied these methods to Two Micron All Sky Survey (2MASS) data to determine maps of β and NIR extinction of the small cloud IC 1396 W. The combination of star counts and colour excess results in the most reliable method to determine β. It is found that the use of the correct β map to transform colour excess values into extinction is fundamental for column density profile analysis of clouds. We describe how artificial photometric data, based on the model of stellar population synthesis of the Galaxy, can be used to estimate uncertainties and derive systematic effects of the extinction methods presented here. We find that all colour excess based extinction determination methods are subject to small but systematic offsets, which do not affect the star counting technique. These offsets occur since stars seen through a cloud do not represent the same population as stars in an extinction-free control field. © 2006 RAS.

Item Type: Article
DOI/Identification number: 10.1111/j.1365-2966.2006.10436.x
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Mon. Not. R. Astron. Soc. [Field not mapped to EPrints] AD - Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland [Field not mapped to EPrints] AD - Dunsink Observatory, Castleknock, Dublin 15, Ireland [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Dust, extinction, ISM: clouds, ISM: structure
Subjects: 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: 21 Jul 2015 10:15 UTC
Last Modified: 29 May 2019 14:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49571 (The current URI for this page, for reference purposes)
  • Depositors only (login required):