Study of Galactic structure using UVIT/AstroSat star counts

被引：1

作者：

Kumar, Ranjan ^{[1
]}

Pradhan, Ananta C. ^{[1
]}

Ojha, Devendra K. ^{[2
]}

Piridi, Sonika ^{[1
]}

Baug, Tapas ^{[3
]}

Ghosh, S. K. ^{[2
]}

机构：

[1] Natl Inst Technol, Dept Phys & Astron, Rourkela 769008, India

[2] Tata Inst Fundamental Res, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India

[3] Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China

来源：

JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 2021年 / 42卷 / 02期

关键词：

Stars: distances; ultraviolet: stars; galaxy; disc; DIGITAL SKY SURVEY; MILKY-WAY; STELLAR POPULATIONS; MODEL PARAMETERS; SCALE LENGTH; THICK DISC; WHOLE SKY; GALAXY; SDSS; EVOLUTION;

D O I：

10.1007/s12036-020-09684-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The structure of our Galaxy has been studied from ultraviolet (UV) star counts obtained with the Ultra-Violet Imaging Telescope (UVIT) on board the AstroSat satellite, in Far-UV (FUV) and Near-UV (NUV) bands. The F154W (BaF2) and N263M (NUVB4) filters were used in the FUV and NUV bands, respectively. The point sources are separated from the extra-galactic sources of UVIT observations using infrared (IR) color cut method. The observed UVIT star counts match well with the simulations obtained from the Besancon model of stellar population synthesis towards several Galactic directions. We also estimated the scale length and scale height of the thick disc and the scale height of the thin disc using the space density function and the exponential density law for the stars of intermediate galactic latitudes. The scale length of the thick disc ranges from 3.11 to 5.40 kpc whereas the scale height ranges from 530 +/- 32 pc to 630 +/- 29 pc. The scale height of the thin disc comes out to be in the range of 230 +/- 20 pc to 330 +/- 11 pc.

引用

页数：7

共 50 条

[41] THE DISK AND HALO DENSITIES AT THE PLANE FROM STAR COUNTS IN THE GALACTIC POLES
SANDAGE, A
ASTRONOMICAL JOURNAL, 1987, 93 (03): : 610 - 615
[42] The morphology and luminosity function of the Galactic bulge from TMGS star counts
LopezCorredoira, M
Garzon, F
Hammersley, P
Mahoney, T
Calbet, X
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 292 (01) : L15 - L19
[43] Open star clusters and Galactic structure
Joshi, Yogesh C.
ASTROMETRY AND ASTROPHYSICS IN THE GAIA SKY, 2018, 12 (S330): : 227 - 228
[44] Star Forming Regions and Galactic structure
V.S. Avedisova
Astrophysics and Space Science, 1997, 252 : 261 - 272
[45] Flat fielding the galaxy - Fitting a Galactic model to APS star counts
Larsen, JA
PROPER MOTIONS AND GALACTIC ASTRONOMY, 1997, 127 : 169 - 174
[46] PROGRAM OF THE GALACTIC MERIDIAN - STAR COUNTS AND GALACTIC MODELS .1. DISTRIBUTIONS OF STELLAR MAGNITUDES AND COLORS
ANDRUK, V
KHARCHENKO, N
SCHILBACH, E
SCHOLZ, RD
ASTRONOMISCHE NACHRICHTEN, 1995, 316 (06) : 387 - 400
[47] Programme of the Galactic meridian: Star counts and Galactic models .2. Distribution of absolute proper motions
Andruk, V
Kharchenko, N
Schilbach, E
Scholz, RD
ASTRONOMISCHE NACHRICHTEN, 1996, 317 (01) : 19 - 28
[48] UV Spectral Characterization of Low-mass Stars with AstroSat UVIT for Exoplanet Applications: The Case Study of HIP 23309
Ranjan, Sukrit
Nayak, Prasanta K.
Pineda, J. Sebastian
Narang, Mayank
ASTRONOMICAL JOURNAL, 2023, 166 (02):
[49] STAR COUNTS AND THE MILKY-WAY STRUCTURE
ROBIN, AC
ASTRONOMY FROM WIDE-FIELD IMAGING, 1994, (161): : 403 - 410
[50] A study of the star-forming regions in the spiral galaxy NGC 2336 using the Ultraviolet Imaging Telescope (UVIT)
Rahna, P. T.
Das, M.
Murthy, Jayant
Gudennavar, S. B.
Bubbly, S. G.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 481 (01) : 1212 - 1234

← 1 2 3 4 5 →