2001A&A...373..886R

Query : 2001A&A...373..886R

2001A&A...373..886R - Astronomy and Astrophysics, volume 373886-894 (2001/7-3)

Early galaxy evolution from deep wide field star counts. II. First estimate of the thick disc mass function.

REYLE C. and ROBIN A.C.

Abstract (from CDS):

Star counts at high and intermediate galactic latitudes, in the visible and the near infrared, are used to determine the density law and the initial mass function of the thick disc population. The combination of shallow fields dominated by stars at the turnoff with deep fields allows the determination of the thick disc mass function in the mass range 0.2-0.8 M☉. Star counts are compared with simulations of a synthesis population model. The fit is based on a maximum likelihood criterion. The best fit model gives a scale height of 800 pc, a scale length of 2500 pc and a local density of 10–3 stars pc–3 or 7.1x10–4 M☉ pc–3 for Mv ≤8. The IMF is found to follow a power law dN/dm ∝m–0.5. This is the first determination of the thick disc mass function.

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Journal keyword(s): Galaxy: structure - Galaxy: stellar content - Galaxy: general

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SA 57- reg 13 08 38 +29 23.1           ~ 179 0

Query : 2001A&A...373..886R

Basic data :
SA 57- -- Region defined in the Sky
Other object types: otypes_help 		reg (), * (SA)
ICRS coord. (ep=J2000) : 		13 08 38.0 +29 23 06 [ ] E 1980ApJS...43..305K
FK4 coord. (ep=B1950 eq=1950) : 		13 06 15.2 +29 39 05 [ ]
Gal coord. (ep=J2000) : 		064.7309 +85.5925 [ ]
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Identifiers (1) :
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SA 57-

References (179 between 1850 and 2026) (Total 179)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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ISO : 27   

   

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