2002/03/13 by S. K. Ghosh, D. K. Ojha · 4 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics and Star Formation Studies #Atmospheric Ozone and Climate #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20020497
to be published in Astronomy & Astrophysics; (9 pages including 2 tables & 11 figures)
arxiv created 2002/03/13 · openalex publication_date 2002/05/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
The Midcourse Space Experiment (MSX) has surveyed the Galactic plane in four infrared bands between 6 and 25 μm. Two of these bands cover several Unidentified Infrared emission Bands (UIBs). With the aim of extracting the spatial distribution of the UIB emission on a large scale, a scheme has been developed to model the MSX data with emission in the UIBs alongwith the underlying thermal continuum from the interstellar dust. In order to test this scheme, a sample of five Galactic compact H II regions (Sh-61, Sh-138, Sh-152, Sh-156, Sh-186; Zavagno & Ducci [CITE]) for which imaging data in some individual UIBs is available from ISOCAM measurements, has been studied. The results of this comparative study on a small angular scale are as follows: (i) the morphological details extracted from our scheme agree very well with those from the superior ISOCAM measurements; (ii) the integrated strength of UIBs extracted from the MSX database correlates extremely well with the sum of the strengths of individual UIBs measured from ISOCAM. This tight correlation is very encouraging and promises the potential of MSX database for the study of large-scale spatial distribution of UIB emission (and the carriers of UIBs) in the entire Galactic plane.