2008MNRAS.383L..20D

Query : 2008MNRAS.383L..20D

2008MNRAS.383L..20D - Mon. Not. R. Astron. Soc., 383, L20-L24 (2008/January-1)

On the radial distribution of white dwarfs in the globular cluster NGC 6397.

DAVIS D.S., RICHER H.B., KING I.R., ANDERSON J., COFFEY J., FAHLMAN G.G., HURLEY J. and KALIRAI J.S.

Abstract (from CDS):

We have examined the radial distribution of white dwarfs over a single Hubble Space Telescope/Advanced Camera for Surveys field in the nearby globular cluster NGC 6397. In relaxed populations, such as in a globular cluster, stellar velocity dispersion, and hence radial distribution, is directly dependent on stellar masses. The progenitors of very young cluster white dwarfs had a mass of ∼0.8M_☉, while the white dwarfs themselves have a mass of ∼0.5M_☉. We thus expect young white dwarfs to have a concentrated radial distribution (like that of their progenitors) that becomes more extended over several relaxation times to mimic that of ∼0.5-M_☉main-sequence stars. However, we observe young white dwarfs to have a significantly extended radial distribution compared both with the most massive main-sequence stars in the cluster and with old white dwarfs.

Journal keyword(s): stellar dynamics - stars: Population II - white dwarfs - globular clusters: individual: NGC 6397

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	NGC 6397	GlC	17 40 42.09	-53 40 27.6			5.17			~	2103	0

Query : 2008MNRAS.383L..20D

Basic data :

NGC 6397 -- Globular Cluster

GlC (2013A&A,GCl), Cl* (C,[KPS2012])

17 40 42.09 -53 40 27.6 (Optical) [ ] D 2010AJ....140.1830G

17 36 37.84 -53 38 53.5 [ ]

338.16501 -11.95952 [ ]

3.30 -17.60 [0.01 0.01 90] C 2019MNRAS.482.5138B

V(km/s) 18.4 [0.1] / z(spectroscopic) 0.000061 [0.000000] / cz 18.40 [0.10] (Opt) A 2018MNRAS.478.1520B

0.416 [0.010] C 2021MNRAS.505.5978V

25.7 25.7 90 (Opt) D 1989Sci...246.1066D

V 5.17 [~] D 2012AJ....144..126D

K 3.29 [~] D 2008MNRAS.389.1924F

z (AB) 5.450 [0.044] C 2014MNRAS.437.1725V

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NGC 6397 C 1736-536 GCl 74 [KPS2012] MWSC 2662

References (2103 between 1850 and 2026) (Total 2103)
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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