J/A+A/347/841 HST Observations of SMC N88A (Heydari-Malayeri+, 1999)
HST observations of the very young SMC "blob" N88A
Heydari-Malayeri M., Charmandaris V., Deharveng L., Rosa M.R.,
Zinnecker H.
<Astron. Astrophys. 347, 841 (1999)>
=1999A&A...347..841H 1999A&A...347..841H (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, early-type ; Photometry
Mission_Name: HST
Keywords: stars: early-type - ISM: dust, extinction - ISM: HII regions -
ISM: individual objects: N 88A (SMC) - galaxies: Magellanic Clouds
Abstract:
High-resolution Hubble Space Telescope images have allowed us for
the first time to resolve the compact SMC ionized ``blob'' N88A
(diameter ∼3.5arcsec or 1pc). This very young HII, region, which is
hatching from its natal molecular cloud, is heavily affected by
absorbing dust associated with the cloud. The interstellar reddening
towards N88A is on average Av∼1.5mag and strikingly rises to more
than 3.5mag in a narrow dust band crossing the core of the HII
region. Such a high extinction is unprecedented for an HII region in
the metal-poor SMC. We present the photometry of some 70 stars lying
towards the OB association at the center of which lies N88A. The
exciting star(s) of N88A is not detected, due to the heavy
extinction. The chronology of star formation is discussed for the
whole region.
Description:
We present the photometry of the 63 brightest stars found in N88 as
identified in the finder chart (Fig. 6) of our paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 63 Photometry of the brightest stars towards N88
table1.tex 100 136 LaTeX version of table1
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential star number
4- 5 I2 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 14 F5.2 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 27 F5.2 arcsec DEs Declination (J2000)
29- 33 F5.2 mag wideUmag ? Magnitude in U (F300W) filter
35- 39 F5.2 mag vmag ? Magnitude in v (F410W) filter
41- 45 F5.2 mag bmag ? Magnitude in b (F467M) filter
47- 51 F5.2 mag HeII ? Magnitude in He II (F469N) filter
53- 57 F5.2 mag ymag ? Magnitude in y (F547M) filter
59- 71 A13 --- Notes Notes (1)
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Note (1): The capital letters B to H indicate the associated 2 regions
presented in Fig.1b. The spectral types and identifications of
Wilcots (1994AJ....108.1674W 1994AJ....108.1674W) for some stars are included inside
parentheses. Star numbers are indicated in Fig.6.
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Acknowledgements: Mohammad Heydari-Malayeri
(End) Patricia Bauer [CDS] 23-Apr-1999