J/A+A/502/1015 OB associations in IC 1613 (Garcia+, 2009)
The young stellar population of IC 1613. I. A new catalogue of OB associations.
Garcia M., Herrero A., Vicente B., Castro N., Corral L.J., Rosenberg A.,
Monelli M.
<Astron. Astrophys., 502, 1015-1041 (2009)>
=2009A&A...502.1015G 2009A&A...502.1015G
ADC_Keywords: Galaxies, nearby ; Associations, stellar
Keywords: stars: early-type - Galaxy: stellar content - galaxies: photometry -
galaxies: individual: IC 1613 - astrometry - catalogs
Abstract:
Determining the parameters of massive stars is crucial to understand
many processes in galaxies and the Universe, since these objects are
important sources of ionization, chemical enrichment and momentum. 10m
class telescopes enable us to perform detailed quantitative
spectroscopic analyses of massive stars in other galaxies, sampling
areas of different metallicity. Relating the stars to their
environment is crucial to understand the physical processes ruling
their formation and evolution.
In preparation for the new instrumentation planned for the Gran
Telescopio CANARIAS (GTC), our goal is to build a list of massive star
candidates in the metal-poor irregular galaxy IC 1613. The catalogue
must have very high astrometric accuracy, suitable for the current
generation of multi-object spectrographs. A census of OB associations
in this galaxy is also needed, to provide important additional
information about the age and environment of the candidate OB stars.
Description:
From observations taken with the Wide Field Camera (WFC) at the Isaac
Newton Telescope (INT), we have built an astrometric and photometric
catalogue of stars in IC 1613. Candidate blue massive stars are
preselected by their colors. A friends-of-friends algorithm is
developed to find their clustering in the galaxy. While a common
physical origin for all the members of the associations cannot be
ensured, this is a necessary first step to place candidate OB stars in
a population context.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 46 198 Catalogue of OB associations in IC 1613
notes.dat 80 191 Individual notes
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See also:
J/A+A/363/29 : Variable stars in IC 1613 (Antonello+, 2000)
J/AJ/119/2780 : C stars in IC 1613 (Albert+, 2000)
J/A+A/367/759 : Variable stars in IC 1613 (Mantegazza+, 2001)
J/AcA/51/221 : OGLE-II. Cepheids in IC 1613 (Udalski+, 2001)
J/A+A/445/901 : BV(RI)c bands of Cepheids in IC 1613 (Antonello+, 2006)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq OB association Sequential number
5- 13 F9.6 deg RAdeg Rigth ascension in decimal degrees (J2000)
15- 22 F8.6 deg DEdeg Declination in decimal degrees (J2000)
24- 25 I2 --- N.OB Number of OB members of the association
27- 29 I3 --- Ntot Total number of members
31- 40 A10 --- Quad Quadrant allocation in Fig. 9.
42- 44 A3 --- Notes Notes (1)
46 A1 --- n_Seq [*] n indicates a note in notes.dat file
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Note (1): Notes as follows:
Gal = the association is actually a galaxy
d = association discarded because it does not have enough valid
members (i.e. visual inspection reveals that some are blends
or gas knots)
? = dubious association (associations with a small number of
members, with a significant fraction under suspicion of being
blends or not blue stars)
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequentiql number
5- 80 A76 --- Note Text of the note
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Jan-2010