2004ApJ...602..264M

Query : 2004ApJ...602..264M

2004ApJ...602..264M - Astrophys. J., 602, 264-270 (2004/February-2)

The dynamical distance to M15: estimates of the cluster's age and mass and of the absolute magnitude of its RR Lyrae stars.

McNAMARA B.J., HARRISON T.E. and BAUMGARDT H.

Abstract (from CDS):

Newly determined high-precision relative proper motions determined from the Hubble Space Telescope Wide Field Planetary Camera 2 are used along with radial velocity measurements to determine the dynamical distance to the globular cluster M15. A comparison of the proper motion and radial velocity dispersions from a sample of 237 stars, located at an average radial distance of about 10" from the cluster center, yields a cluster distance of 9.98±0.47 kpc. This distance agrees to within the stated errors to other distance estimates but places this object about 5% closer than the currently adopted value of 10.4 kpc. Using this new distance, we estimate that RR Lyrae stars having [Fe/H]=-2.15 have a value of Mv(RR)=0.51±0.11. We also estimate that M15 has an age of about 13.2 Gyr, which places it among the oldest of the Galactic globular clusters. From a comparison of the observed velocity dispersion with results from recent N-body calculations, we derive a total cluster mass for M15 of MC=4.5x105M☉.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Distance Scale - Galaxy: Globular Clusters: Individual: Messier Number: M15

VizieR on-line data: <Available at CDS (J/ApJ/602/264): table1.dat>

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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 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

Query : 2004ApJ...602..264M

Basic data :
M 15 -- Globular Cluster
Other object types: otypes_help 		GlC (2013A&A,GCl), Cl* (C,[KPS2012])
ICRS coord. (ep=J2000) : 		21 29 58.33 +12 10 01.2 (Optical) [ ] D 2010AJ....140.1830G
FK4 coord. (ep=B1950 eq=1950) : 		21 27 33.30 +11 56 49.6 [ ]
Gal coord. (ep=J2000) : 		065.01264 -27.31263 [ ]
Proper motions mas/yr : 		-0.63 -3.80 [0.01 0.01 90] C 2019MNRAS.482.5138B
Radial velocity / Redshift / cz : 		V(km/s) -106.5 [0.2] / z(spectroscopic) -0.000355 [0.000001] / cz -106.48 [0.20]
   (Opt) A 2018MNRAS.478.1520B
Parallaxes (mas): 		0.097 [0.010] C 2021MNRAS.505.5978V
Angular size (arcmin): 		12.3 12.3 90 (Opt) D 1989Sci...246.1066D
Fluxes (4) :
g (AB) 7.101 [0.030] C 2014MNRAS.437.1725V
r (AB) 6.692 [0.044] C 2014MNRAS.437.1725V
i (AB) 6.439 [0.044] C 2014MNRAS.437.1725V
z (AB) 6.288 [0.044] C 2014MNRAS.437.1725V
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 685 		Display criteria :

Identifiers (5) :
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M 15 GCl 120 [KPS2012] MWSC 3518
C 2127+119 NGC 7078

References (3274 between 1850 and 2026) (Total 3274)
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 : 4    Distance : 2    Fe/H : 17    Plx : 2    PM : 3   

   

Observing logs
Herschel : 4    ISO : 5    IUE : 14   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : M 15

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NGC 7078

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