J/MNRAS/418/2219 Main sequence intrinsic colours: O8V to M0V (Stead+, 2011)
Determining the age of young embedded clusters.
Stead J.J., Hoare M.G.
<Mon. Not. R. Astron. Soc., 418, 2219-2233 (2011)>
=2011MNRAS.418.2219S 2011MNRAS.418.2219S
ADC_Keywords: Photometry, standards ; MK spectral classification
Keywords: stars: early-type - stars: evolution - stars: formation -
Hertzsprung-Russell and colour-magnitude diagrams -
stars: pre-main-sequence
Abstract:
A new Monte Carlo method has been developed in order to derive ages of
young embedded clusters in massive star-forming regions where there is
strong differential reddening. After foreground and infrared excess
source candidates are removed, each cluster candidate star is
individually dereddened. Simulated clusters are constructed using
isochrones, an initial mass function, realistic photometric errors,
simulated background field populations and extinction distributions.
These synthetic clusters are then dereddened in the same way as the
real data, obtained from a deep near-infrared survey, and used to
derive the ages of three embedded clusters. Results were found to be
consistent with those determined using spectrophotometric methods.
This new method provides way to determine the ages of embedded
clusters when only photometric data are available and there is strong
differential reddening.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 43 27 Main sequence intrinsic colours: O8V to M0V
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- SpType MK spectral type (O8V to M0V)
5- 7 I3 --- Ns Number of stars per subtype
9- 13 F5.2 mag H-K UKIDSS H-K colour index
15- 19 F5.2 mag J-H UKIDSS J-H colour index
21- 25 F5.2 mag H-K2 2MASS H-K colour index
27- 31 F5.2 mag J-H2 2MASS J-H colour index
33- 37 F5.3 mag e_H-K rms uncertainty on H-K
39- 43 F5.3 mag e_J-H rms uncertainty on J-H
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Sep-2012