Dust Structure Around Asymptotic Giant Branch Stars

Abstract

This paper presents mass, temperature profile, and the variation of Planck’s function in different regions around asymptotic giant branch (AGB) stars. The physics of the interstellar medium (ISM) is extremely complex because the medium is very inhomogeneous and is made of regions with fairly diverse physical conditions. We studied the dust environment such as flux, temperature, mass, and inclination angle of the cavity structure around C-rich asymptotic giant branch stars in 60 μm and 100 μm wavelengths band using Infrared Astronomical Survey. We observed the data of AGB stars named IRAS 01142+6306 and IRAS 04369+4501. Flexible image transport system image was downloaded from Sky View Observatory; we obtained the surrounding flux density using software Aladin v2.5. The average dust color temperature and mass are found to be 25.08 K, 23.20 K and 4.73 × ;1026 kg (0.00024 M⊙), 2.58 × 1028 kg (0.013 M⊙), respectively. The dust color temperature ranges from 18.76 K ± 3.16 K to 33.21K ± K and 22.84 K ± 0.18 K to 24.48 K ± 0.63 K. The isolated cavity like structure around the AGB stars has an extension of 45.67 pc × 17.02 pc and 42.25 pc × 17.76 pc, respectively. The core region is found to be edge-on having an inclination angle of 79.46° and 73.99°, respectively.

Distribution of Dust Color Temperature, Planck’s Function, and Dust Mass around PSR J1240-4124

“…Rotating Neutron stars are formed from the explosion of massive stars (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25) known as a supernova explosion. During the phase of the supernova, the star explodes and the core collapses and resulting in to a neutron star [1].…”

Dust Properties of Super-Nova Remnant (Crab Nebula) Using AKARI Survey

“…These facts suggest that interstellar dust plays an important role in shaping mechanism of ISM. Several authors studied about dust environment around Nebula, Pulsars, AGB stars and white dwarfs using IRAS, IRIS AKARI band and survey they found two digit and very low kelvin dust color temperature [17][18][19][20][21][22][23][24][25][26]. So, we studied the physical properties interstellar dust like dust temperature, distribution of Planck's function, dust mass, and visual extinction, etc.…”