Back to Search
Start Over
An updated view of the Milky Way from the BeSSeL programme
- Source :
- 2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
- Publication Year :
- 2021
- Publisher :
- IEEE, 2021.
-
Abstract
- While it is known that the Milky Way is a barred spiral galaxy, the precise locations of the spiral arms are not easily derived by observations, because of the Sun's location in the disk plane. The Galactic disk is large (radius of ~15 kpc) and the high dust obscuration in the disk plane limits distances from optical astrometry to a few kpc. The Bar and Spiral Structure Legacy (BeSSeL) programme and the Japanese VERA project measured parallaxes and proper motions, via VLBI maser astrometry, for more than 200 high-mass star-forming regions out to a distance of 20 kpc. BeSSeL has provided a new parametrisation of the spiral arm structure and determined the fundamental Galactic parameters. The BeSSeL results presented here have been published in [1].
- Subjects :
- Physics
Spiral galaxy
Milky Way
Astronomy
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrometry
Barred spiral galaxy
symbols.namesake
Very-long-baseline interferometry
symbols
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Disc
Astrophysics::Galaxy Astrophysics
Spiral
Bessel function
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)
- Accession number :
- edsair.doi...........68c97dff2c0b13b5658cd4ca32288120