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The reality of old moving groups - the case of HR 1614 - Age, metallicity, and a new extended sample

Feltzing, Sofia LU and Holmberg, Johan LU (2000) In Astronomy & Astrophysics 357(1). p.153-163
Abstract
We prove the existence of the old and metal-rich moving group HR 1614. This is done using the new Hipparcos parallaxes in combination with metallicities derived from Strömgren photometry, supported by dynamical simulations of the evolution of old moving groups in the galactic potential. A new selection criterion for this moving group is presented as well as a new, extended sample of probable member stars.



In particular we find that the HR 1614 moving group has an age of about 2 Gyr (using Bertelli et al. 1994 isochrones) and a [Fe/H] dex.



We also revisit and apply our new selection criterion to the samples in Eggen (1992) and Eggen (1998b). It is found that, when binaries and stars with too low... (More)
We prove the existence of the old and metal-rich moving group HR 1614. This is done using the new Hipparcos parallaxes in combination with metallicities derived from Strömgren photometry, supported by dynamical simulations of the evolution of old moving groups in the galactic potential. A new selection criterion for this moving group is presented as well as a new, extended sample of probable member stars.



In particular we find that the HR 1614 moving group has an age of about 2 Gyr (using Bertelli et al. 1994 isochrones) and a [Fe/H] dex.



We also revisit and apply our new selection criterion to the samples in Eggen (1992) and Eggen (1998b). It is found that, when binaries and stars with too low metallicity have been removed, 15 of his stars fulfill our criteria.



Key words: stars: Hertzsprung Russel (HR) and C-M diagrams stars: kinematics Galaxy: evolution Galaxy: kinematics and dynamics Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: HR 1614



* Based on observations with the ESA Hipparcos satellite (Less)
Please use this url to cite or link to this publication:
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organization
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Contribution to journal
publication status
published
subject
keywords
stars: Hertzsprung Russel (HR) and C-M diagrams stars: kinematics Galaxy: evolution Galaxy: kinematics and dynamics Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: HR 1614
in
Astronomy & Astrophysics
volume
357
issue
1
pages
153 - 163
publisher
EDP Sciences
external identifiers
  • scopus:0001205543
ISSN
0004-6361
language
English
LU publication?
yes
id
69fff092-dcaf-4047-a61b-90e038559c03 (old id 113707)
alternative location
http://aa.springer.de/bibs/0357001/2300153/small.htm
date added to LUP
2007-07-13 09:41:33
date last changed
2017-05-21 04:15:39
@article{69fff092-dcaf-4047-a61b-90e038559c03,
  abstract     = {We prove the existence of the old and metal-rich moving group HR 1614. This is done using the new Hipparcos parallaxes in combination with metallicities derived from Strömgren photometry, supported by dynamical simulations of the evolution of old moving groups in the galactic potential. A new selection criterion for this moving group is presented as well as a new, extended sample of probable member stars.<br/><br>
<br/><br>
In particular we find that the HR 1614 moving group has an age of about 2 Gyr (using Bertelli et al. 1994 isochrones) and a [Fe/H] dex.<br/><br>
<br/><br>
We also revisit and apply our new selection criterion to the samples in Eggen (1992) and Eggen (1998b). It is found that, when binaries and stars with too low metallicity have been removed, 15 of his stars fulfill our criteria.<br/><br>
<br/><br>
Key words: stars: Hertzsprung Russel (HR) and C-M diagrams stars: kinematics Galaxy: evolution Galaxy: kinematics and dynamics Galaxy: open clusters and associations: general Galaxy: open clusters and associations: individual: HR 1614<br/><br>
<br/><br>
* Based on observations with the ESA Hipparcos satellite},
  author       = {Feltzing, Sofia and Holmberg, Johan},
  issn         = {0004-6361},
  keyword      = {stars: Hertzsprung  Russel (HR) and C-M diagrams  stars: kinematics  Galaxy: evolution  Galaxy: kinematics and dynamics  Galaxy: open clusters and associations: general  Galaxy: open clusters and associations: individual: HR 1614},
  language     = {eng},
  number       = {1},
  pages        = {153--163},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {The reality of old moving groups - the case of HR 1614 - Age, metallicity, and a new extended sample},
  volume       = {357},
  year         = {2000},
}