2002ApJ...574L.155H

Query : 2002ApJ...574L.155H

2002ApJ...574L.155H - Astrophys. J., 574, L155-L158 (2002/August-1)

The white dwarf cooling sequence of the globular cluster Messier 4.

HANSEN B.M.S., BREWER J., FAHLMAN G.G., GIBSON B.K., IBATA R., LIMONGI M., RICH R.M., RICHER H.B., SHARA M.M. and STETSON P.B.

Abstract (from CDS):

We present the white dwarf sequence of the globular cluster M4, based on a 123 orbit Hubble Space Telescope exposure, with a limiting magnitude of V∼30 and I∼28. The white dwarf luminosity function rises sharply for I>25.5, consistent with the behavior expected for a burst population. The white dwarfs of M4 extend to approximately 2.5 mag fainter than the peak of the local Galactic disk white dwarf luminosity function. This demonstrates a clear and significant age difference between the Galactic disk and the halo globular cluster M4. Using the same standard white dwarf models to fit each luminosity function yields ages of 7.3±1.5 Gyr for the disk and 12.7±0.7 Gyr for M4 (2 σ statistical errors).

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Halo - Galaxy: Globular Clusters: Individual: Messier Number: M4 - Stars: Luminosity Function, Mass Function - Stars: Population II - Stars: White Dwarfs

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 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0

Query : 2002ApJ...574L.155H

Basic data :
M 4 -- Globular Cluster
Other object types: otypes_help 		GlC (2013A&A,GCl), * (CD,GCRV,...), Cl* (C,[KPS2012])
ICRS coord. (ep=J2000) : 		16 23 35.22 -26 31 32.7 (Optical) [ ] D 2010AJ....140.1830G
FK4 coord. (ep=B1950 eq=1950) : 		16 20 31.21 -26 24 36.3 [ ]
Gal coord. (ep=J2000) : 		350.97293 +15.97218 [ ]
Proper motions mas/yr : 		-12.48 -18.99 [0.01 0.01 90] C 2019MNRAS.482.5138B
Radial velocity / Redshift / cz : 		V(km/s) 71.0 [0.1] / z(spectroscopic) 0.000237 [0.000000] / cz 71.01 [0.10]
   (Opt) A 2018MNRAS.478.1520B
Parallaxes (mas): 		0.556 [0.010] C 2021MNRAS.505.5978V
Angular size (arcmin): 		26.3 26.3 90 (Opt) D 1989Sci...246.1066D
Fluxes (3) :
K 2.32 [~] D 2008MNRAS.389.1924F
g (AB) 5.251 [0.031] C 2014MNRAS.437.1725V
z (AB) 4.435 [0.044] C 2014MNRAS.437.1725V
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 575 		Display criteria :

Identifiers (8) :
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M 4 CD-26 11314 GCRV 5569 E NGC 6121
C 1620-264 GCl 41 HD 147552 [KPS2012] MWSC 2396

References (1978 between 1850 and 2026) (Total 1978)
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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Collections of Measurements Description of Measurements

Velocities : 5    Distance : 1    Fe/H : 13    Plx : 2    PM : 3   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : M 4

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CD-26 11314 HD 147552 NGC 6121

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