dc.contributor.author |
Sengupta, S |
|
dc.date.accessioned |
2020-11-19T13:38:41Z |
|
dc.date.available |
2020-11-19T13:38:41Z |
|
dc.date.issued |
2016-07 |
|
dc.identifier.citation |
Journal Astrophysics and Astronomy, Vo. 37, No. 2, 11 |
en_US |
dc.identifier.issn |
0250-6335 |
|
dc.identifier.uri |
http://prints.iiap.res.in/handle/2248/7244 |
|
dc.description |
Restricted Access © Indian Academy of Sciences http://dx.doi.org/10.1007/s12036-016-9390-0 |
en_US |
dc.description.abstract |
An abundance analysis is reported of 58-K giants identified by Famaey et al. (
2005
, A&A,
430, 165) as highly probable members of the Hercules stream selected from stars north of
the celestial equator in the
Hipparcos
catalogue. The giants have compositions spanning the
interval [Fe/H] from
−
0.17 to
+
0.42 with a mean value of
+
0.15 and relative elemental
abundances [El/Fe] representative of the Galactic thin disc. Selection effects may have biased
the selection from the
Hipparcos
catalogue against the selection of metal-poor stars. Our
reconsideration of the recent extensive survey by Bensby et al. of FG dwarfs, including metal-
poor stars, provides a [Fe/H] distribution for the Hercules stream, which is similar to that from
the 58 giants. It appears that the stream is dominated by metal-rich stars from the thin disc. We
discuss suggestions in the literature that the stream includes metal-poor stars from the thick
disc. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Indian Academy of Sciences |
en_US |
dc.subject |
Hydrodynamics |
en_US |
dc.subject |
Planetary systems |
en_US |
dc.subject |
stars |
en_US |
dc.subject |
Earth: atmosphere |
en_US |
dc.title |
An upper limit on the ratio between the extreme ultraviolet and the bolometric luminosities of stars hosting habitable planets |
en_US |
dc.type |
Article |
en_US |