Mapping the Interstellar Dust with Near-Infrared Observations: An Optimized Multi-Band Technique

Marco Lombardi, João Alves

Publications: Contribution to bookContribution to proceedings


We generalize Lada et al. (1994) NICE technique to map dust column density through a molecular cloud to an optimized multi-band technique that can be applied to any multi-band survey of molecular clouds. We present a first application to a ˜ 625 deg^2 subset of the Two Micron All Sky Survey (2MASS) data and show that when compared to NICE, the optimized NICER (i) achieves the same extinction peak values, (ii) improves the noise variance of the map by a factor of 2 and (iii) is able to reach 3 σ dust extinction measurements as low as A_V ˜eq 0.5 magnitudes, better than or equivalent to classical optical star count techniques and below the threshold column density for the formation of CO.
Original languageEnglish
Title of host publicationThe Origin of Stars and Planets: The VLT View
Subtitle of host publicationProceedings of the ESO Workshop Held in Garching, Germany, 24-27 April 2001
EditorsJoão F. Alves, Mark J. McCaughrean
Place of PublicationBerlin
PublisherSpringer-Verlag Berlin-Heidelberg
ISBN (Electronic)978-3-540-46031-2
ISBN (Print)978-3-540-43541-9
Publication statusPublished - 2002

Publication series

SeriesESO Astrophysics Symposia

Austrian Fields of Science 2012

  • 103004 Astrophysics

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