Far infrared observations of the southern Galactic star forming complex around IRAS 09002-4732
Abstract
The Galactic star forming region in the southern sky, associated with IRAS 09002-4732 has been mapped simultaneously in two far infrared bands (148 & 209 um), with ~ 1' angular resolution. Fifteen sources including IRAS 08583-4719, 08589-4714, 09002-4732 and 09014-4736 have been detected, some of which are well resolved. Taking advantage of similar beams in the two bands, a reliable dust temperature [T(148/209)] map has been obtained, which detects colder dust (< 30 K) in this region. The HIRES processed IRAS maps at 12, 25, 60 & 100 um have also been used for comparison. The optical depth maps at 200 um & 100 um, generated from these FIR data quantify the spatial distribution of the dust. The diffuse emission from this entire region has been found to be 35 % of the total FIR luminosity. The slope of the IMF in the mass range 4-16 Msun has been estimated to be -1.25+0.75-0.65 for this star forming complex. Radiative transfer models have been explored to fit available observations of the 4 IRAS sources and extract various physical parameters for corresponding dust-gas clouds. Whereas a constant radial density distribution is favoured in IRAS 08583-4719, 08589-4714 & 09002-4732, the r-1 law is inferred for IRAS 09014-4736. The dust composition is found to be similar (Silicate dominated) in all the 4 sources. The luminosity per unit mass is found to be in the narrow range of 44-81 Lsun/Msun for these star forming regions.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.