J/AJ/108/1256 The OB association LH 58 (Garmany+, 1994)
The OB association LH 58 in the Large Magellanic Cloud
Garmany C.D., Massey P., Parker J.W.
<Astron. J. 108, 1256 (1994)>
=1994AJ....108.1256G 1994AJ....108.1256G (SIMBAD/NED Reference)
ADC_Keywords: Associations, stellar ; Photometry, CCD
Abstract:
We present CCD photometry and spectroscopy for stars in Lucke-Hodge 58,
an isolated OB association in the Large Magellanic Cloud (LMC)
northwest of 30 Doradus. The photometric catalog contains 839 stars
with UBV magnitudes complete to V∼19. We have obtained spectra
and classified 35 stars; combined with previous published spectral
types, we find 22 O-type stars. The earliest type is O3-4 V, and there
are three WR stars in the association. The slope of the initial mass
function, Gamma=-1.7±0.3, is in good agreement with other LMC
associations. The presence of several evolved supergiants with masses
about 15-25M☉ suggests that some star formation took place as early
as 10 million years ago, but the majority of stars formed coevally
within the past few million years.
Addresses:
Garmany C.D.
Joint Institute for Laboratory Astrophysics, Box 440 University of
Colorado, Boulder, Colorado 80309-0389
Massey P.
Kitt Peak National Observatory, National Optical Astronomy Observatories,
P.O. Box 26732, Tucson, Arizona 85726-6732
Parker J.W.
Laboratory for Astrophysics and Space Astronomy, Code 681,
Goddard Space Flight Center - NASA, Greenbelt, Maryland 20771
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 44 839 UBV photometry of stars in LH 58
table3.tex 92 976 LaTeX version of table3
posmk.dat 48 29 *Position and MK types of selected stars
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Note on posmk.dat: file supplied by Brian Skiff in April 2004;
it contains spectral types from table4 of paper, and accurate
positions from reference catalogs.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Star number, in increasing RA order
6- 11 F6.1 pix Xpos X CCD coordinate
13- 17 F5.1 pix Ypos Y CCD coordinate
19- 24 F6.2 mag Vmag V magnitude
25- 26 A2 --- u_Vmag [: ] Uncertainty flag for V (1)
28- 33 F6.2 mag B-V B-V color
34- 35 A2 --- u_B-V [: ] Uncertainty flag for B-V (1)
37- 42 F6.2 mag U-B U-B color
43- 44 A2 --- u_U-B [: ] Uncertainty flag for U-B (1)
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Note (1): A colon, ":", indicates that the error in magnitude or color
(i.e. the weighted average of the photometric errors for that star as
calculated by DAOPHOT) is greater than two times the error listed in
Table 2 in the printed paper. Two colons, "::", indicate errors
greater than three times the typical value.
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Byte-by-byte Description of file: posmk.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Star number, as in table3.dat
7- 8 I2 h RAh Right Ascension J2000 (hours)
10- 11 I2 min RAm Right Ascension J2000 (minutes)
13- 17 F5.2 s RAs Right Ascension J2000 (seconds)
19 A1 --- DE- Declination J2000 (sign)
20- 21 I2 deg DEd Declination J2000 (degrees)
23- 24 I2 arcmin DEm Declination J2000 (minutes)
26- 29 F4.1 arcsec DEs Declination J2000 (seconds)
31 A1 --- refPos [UM] Reference of position:
U=UCAC2 (Cat. I/289), M=2MASS (Cat. II/246)
33- 37 F5.2 mag Vmag V magnitude, as in tabe3.dat
40- 48 A9 --- SpType MK Spectral type (from Table 4 of paper)
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Origin: AAS CD-ROM series, Volume 3, 1995
History:
* 16-Feb-1995: first version with table3 only, originally prepared by
Lee Brotzman and distributed as AAS CD-ROM series, Volume 3.
* 26-Apr-2004: accurate positions and spectral types extracted from
Tble4 of paper were forwarded by B. Skiff to CDS.
(End) Patricia Bauer, Francois Ochsenbein [CDS] 26-Apr-2004