Back to Search
Start Over
Impact of distance determinations on Galactic structure. I. Young and intermediate-age tracers
- Source :
- Space Science Reviews
- Publication Year :
- 2018
-
Abstract
- Here we discuss impacts of distance determinations on the Galactic disk traced by relatively young objects. The Galactic disk, about 40 kpc in diameter, is a cross-road of studies on the methods of measuring distances, interstellar extinction, evolution of galaxies, and other subjects of interest in astronomy. A proper treatment of interstellar extinction is, for example, crucial for estimating distances to stars in the disk outside the small range of the solar neighborhood. We'll review the current status of relevant studies and discuss some new approaches to the extinction law. When the extinction law is reasonably constrained, distance indicators found in today and future surveys are telling us stellar distribution and more throughout the Galactic disk. Among several useful distance indicators, the focus of this review is Cepheids and open clusters (especially contact binaries in clusters). These tracers are particularly useful for addressing the metallicity gradient of the Galactic disk, an important feature for which comparison between observations and theoretical models can reveal the evolutionary of the disk.<br />Review article, 48 pages, 14 figures, Accepted for publication in Space Science Reviews (resulting from the May 2016 ISSI-BJ workshop on Astronomical Distance Determination in the Space Age)
- Subjects :
- Cepheid variable
Metallicity
Extinction (astronomy)
Cepheids: distance scale
Stars: variables
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
0103 physical sciences
Disc
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
Physics
010308 nuclear & particles physics
Settore FIS/05
Astronomy and Astrophysics
Astrophysics - Astrophysics of Galaxies
Galaxy
Stars
Planetary science
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics::Earth and Planetary Astrophysics
Open cluster
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Space Science Reviews
- Accession number :
- edsair.doi.dedup.....d5c0297cf51d3062e7d7d9a5bc3d5168