ﻻ يوجد ملخص باللغة العربية
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 M_sun 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 L_sun/M_sun for these star forming regions.
Two Galactic star forming regions, one in a very early phase of evolution and another evolved one, associated with the IRAS sources 00338+6312 and 03595+5110 (RAFGL 5111) respectively have been studied in detail. These sources have been mapped simult
IRAS 09002-4732 is a poorly studied embedded cluster of stars in the Vela Molecular Ridge at a distance of 1.7kpc. Deep observations with the Chandra X-ray Observatory, combined with existing optical and infrared surveys, produce a catalog of 441 pro
The physical conditions of the interstellar medium and stellar components in the regions of the southern Galactic star forming complexes associated with IRAS 10049-5657 and IRAS 10031-5632 have been investigated. These regions have been mapped simult
We performed J- and R-band linear polarimetry with the 4.2 m William Herschel Telescope at the Observatorio del Roque de los Muchachos and with the 1.6 m telescope at the Observatorio do Pico dos Dias, respectively, to derive the magnetic field geome
We study the mid- to far-IR properties of a 24um-selected flux-limited sample (S24 > 5mJy) of 154 intermediate redshift (<z>~0.15), infrared luminous galaxies, drawn from the 5MUSES survey. By combining existing mid-IR spectroscopy and new Herschel S