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Improving distance estimates to nearby bright stars: Combining astrometric data from Hipparcos, Nano-JASMINE and Gaia

Michalik, Daniel LU ; Lindegren, Lennart LU ; Hobbs, David LU ; Lammers, Uwe and Yamada, Yoshiyuki (2013) International Astronomical Union, Symposium 289: Advancing the Physics of Cosmic Distances In Advancing the Physics of Cosmic Distances, Proceedings of the International Astronomical Union, IAU Symposium, Volume 289, pp. 414-417 289. p.414-417
Abstract
Starting in 2013, Gaia will deliver highly accurate astrometric data, which eventually will supersede most other stellar catalogues in accuracy and completeness. It is, however, limited to observations from magnitude 6 to 20 and will therefore not include the brightest stars. Nano-JASMINE, an ultrasmall Japanese astrometry satellite, will observe these bright stars, but with much lower accuracy. Hence, the Hipparcos catalogue from 1997 will likely remain the main source of accurate distances to bright nearby stars. We are investigating how this might be improved by optimally combining data from all three missions through a joint astrometric solution. This would take advantage of the unique features of each mission: the historic bright-star... (More)
Starting in 2013, Gaia will deliver highly accurate astrometric data, which eventually will supersede most other stellar catalogues in accuracy and completeness. It is, however, limited to observations from magnitude 6 to 20 and will therefore not include the brightest stars. Nano-JASMINE, an ultrasmall Japanese astrometry satellite, will observe these bright stars, but with much lower accuracy. Hence, the Hipparcos catalogue from 1997 will likely remain the main source of accurate distances to bright nearby stars. We are investigating how this might be improved by optimally combining data from all three missions through a joint astrometric solution. This would take advantage of the unique features of each mission: the historic bright-star measurements of Hipparcos, the updated bright-star observations of Nano-JASMINE, and the very accurate reference frame of Gaia. The long temporal baseline between the missions provides additional benefits for the determination of proper motions and binary detection, which indirectly improve the parallax determination further. We present a quantitative analysis of the expected gains based on simulated data for all three missions. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
astrometry, catalogs, methods: data analysis, methods: statistical, reference systems
in
Advancing the Physics of Cosmic Distances, Proceedings of the International Astronomical Union, IAU Symposium, Volume 289, pp. 414-417
volume
289
pages
4 pages
publisher
International Astronomical Union
conference name
International Astronomical Union, Symposium 289: Advancing the Physics of Cosmic Distances
DOI
10.1017/S1743921312021849
language
English
LU publication?
yes
id
d2e5e21b-500f-4523-b8da-8d3e92135481 (old id 5337115)
date added to LUP
2015-04-28 17:03:44
date last changed
2016-04-16 08:41:20
@inproceedings{d2e5e21b-500f-4523-b8da-8d3e92135481,
  abstract     = {Starting in 2013, Gaia will deliver highly accurate astrometric data, which eventually will supersede most other stellar catalogues in accuracy and completeness. It is, however, limited to observations from magnitude 6 to 20 and will therefore not include the brightest stars. Nano-JASMINE, an ultrasmall Japanese astrometry satellite, will observe these bright stars, but with much lower accuracy. Hence, the Hipparcos catalogue from 1997 will likely remain the main source of accurate distances to bright nearby stars. We are investigating how this might be improved by optimally combining data from all three missions through a joint astrometric solution. This would take advantage of the unique features of each mission: the historic bright-star measurements of Hipparcos, the updated bright-star observations of Nano-JASMINE, and the very accurate reference frame of Gaia. The long temporal baseline between the missions provides additional benefits for the determination of proper motions and binary detection, which indirectly improve the parallax determination further. We present a quantitative analysis of the expected gains based on simulated data for all three missions.},
  author       = {Michalik, Daniel and Lindegren, Lennart and Hobbs, David and Lammers, Uwe and Yamada, Yoshiyuki},
  booktitle    = {Advancing the Physics of Cosmic Distances, Proceedings of the International Astronomical Union, IAU Symposium, Volume 289, pp. 414-417},
  keyword      = {astrometry,catalogs,methods: data analysis,methods: statistical,reference systems},
  language     = {eng},
  pages        = {414--417},
  publisher    = {International Astronomical Union},
  title        = {Improving distance estimates to nearby bright stars: Combining astrometric data from Hipparcos, Nano-JASMINE and Gaia},
  url          = {http://dx.doi.org/10.1017/S1743921312021849},
  volume       = {289},
  year         = {2013},
}