2007ApJ...658..391J

Query : 2007ApJ...658..391J

2007ApJ...658..391J - Astrophys. J., 658, 391-395 (2007/March-3)

New techniques to determine ages of open clusters using white dwarfs.

JEFFERY E.J., VON HIPPEL T., JEFFERYS W.H., WINGET D.E., STEIN N. and DEGENNARO S.

Abstract (from CDS):

Currently there are two main techniques for independently determining the ages of stellar populations: main-sequence evolution theory (via cluster isochrones) and white dwarf cooling theory. Open clusters provide the ideal environment for the calibration of these two clocks. Because current techniques to derive cluster ages from white dwarfs are observationally challenging, we discuss the feasibility of determining white dwarf ages from the brighter white dwarfs alone. This would eliminate the requirement of observing the coolest (i.e., faintest) white dwarfs. We discuss our method for testing this new idea, as well as the required photometric precision and prior constraints on metallicity, distance, and reddening. We employ a new Bayesian statistical technique to obtain and interpret results.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Open Clusters and Associations: General - 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	NGC 2168	OpC	06 09 07.5	+24 20 15						~	604	0

Query : 2007ApJ...658..391J

Basic data :

NGC 2168 -- Open Cluster
Other object types:	`OpC (2013A&A,OCl)`, `Cl* (2020A&A,C,...)`, `As* (2019AJ,[KC2019])`
ICRS coord. (ep=J2000) :	`06 09 07.5 +24 20 15 (Optical) [ ] E 2023A&A...674A..37G`
FK4 coord. (ep=B1950 eq=1950) :	`06 06 03.5 +24 20 48 [ ]`
Gal coord. (ep=J2000) :	`186.6121 +02.2381 [ ]`
Proper motions mas/yr :	`2.2784 -2.9336 [0.0052 0.0050 90] B` `2018A&A...616A..10G`
Radial velocity / Redshift / cz :	`V(km/s) -6.37 [0.14] / z(spectroscopic) -0.000021 [0.000000] / cz -6.37 [0.14] (NIR) A 2019A&A...623A..80C`
Parallaxes (mas):	`1.1301 [0.0013] B` `2018A&A...616A..10G`
Angular size (arcmin):	`38.3 38.3 0 (Opt) D` `2020A&A...633A..99C`

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`M 35`	`NGC 2168`	`[KC2019] Theia 203`	`[KPS2012] MWSC 0754`
`C 0605+243`	`OCl 466.0`	`[KPR2004b] 87`

References (604 between 1850 and 2026) (Total 604)
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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