J/A+A/350/883 R CrA ISOCAM observations (Olofsson+, 1999)
ISOCAM observations of the R CrA star formation region.
Olofsson G., Huldtgren M., Kaas A.A., Bontemps S., Nordh L., Abergel A.,
Andre P., Boulanger F., Burgdorf M., Casali M.M., Cesarsky C.J., Davies J.,
Falgarone E., Montmerle T., Perault M., Persi P., Prusti T., Puget J.L.,
Sibille F.
<Astron. Astrophys. 350, 883 (1999)>
=1999A&A...350..883O 1999A&A...350..883O
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ;
Infrared sources
Keywords: stars: formation - stars: fundamental parameters - stars: low-mass,
brown dwarfs - stars: luminosity function, mass function -
stars: pre-main sequence - infrared: stars
Abstract:
The results of an ISOCAM survey of the R CrA star formation region are
presented. The survey was carried out in two broad-band filters,
LW2 (5-8.5µm) and LW3 (12-18µm). Although it was not possible to
map the densest, central region due to saturation problems, 21 sources
were identified which showed mid-IR excesses. Most of these sources
have not previously been recognised as YSOs (Young Stellar Objects),
mainly because they are relatively faint. We find evidence for a
population of very low mass stars which are probably brown dwarfs in
their early contraction phases.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 64 21 ISOCAM sources with mid-IR excesses
table2.dat 60 5 YSOs without detected mid-IR excesses
table12.tex 75 104 LaTeX version of tables 1 & 2
list.dat 40 235 Full list of identified ISOCAM sources
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See also:
J/ApJ/397/520 : IRAS observations in Cr A (Wilking+, 1992)
J/A+A/357/219 : Cha I ISOCAM observations (Persi+, 2000)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ISO-CrA Sequential number
5- 6 I2 h RAh Right ascension (1950)
8- 9 I2 min RAm Right ascension (1950)
11- 14 F4.1 s RAs Right ascension (1950)
16 A1 --- DE- Declination sign (1950)
17- 18 I2 deg DEd Declination (1950)
20- 21 I2 arcmin DEm Declination (1950)
23- 24 I2 arcsec DEs Declination (1950)
26- 31 F6.4 Jy F(6.7) Flux at 6.7µm
33- 38 F6.4 Jy F(14.3) ? Flux at 14.3µm
40- 43 F4.2 --- F(14.3)/F(6.7) ? F(14.3)/F(6.7) ratio
45- 64 A20 --- Source Source identification (1)
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Note (1): Source identification:
GP: sources observed by Glass & Penston (1975MNRAS.172..227G 1975MNRAS.172..227G)
VSS: sources observed by Vrba, Strom & Strom (1976AJ.....81..317V 1976AJ.....81..317V)
R: sources observed by Patter (1998ASPC..154.1755P 1998ASPC..154.1755P)
IRS: sources observed by Taylor & Storey (1984MNRAS.209p...5T 1984MNRAS.209p...5T)
Hα: sources observed by Marraco & Ryngren (1981AJ.....86...62M 1981AJ.....86...62M)
W97-1: source in table 1 in Wilking et al. (1997AJ....114.2029W 1997AJ....114.2029W)
W97-2: source table2 in Wilking et al. (1997AJ....114.2029W 1997AJ....114.2029W)
iras: sources Rin Wilking et al. (1992, Cat. J/ApJ/397/520)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1 I1 --- T [1/2]? If the object is in tables 1 or 2,
number of that table
3- 5 I3 --- ISO-CrA Sequential number of the source
7- 8 I2 h RAh Right ascension (1950)
10- 11 I2 min RAm Right ascension (1950)
13- 16 F4.1 s RAs Right ascension (1950)
18 A1 --- DE- Declination sign (1950)
19- 20 I2 deg DEd Declination (1950)
22- 23 I2 arcmin DEm Declination (1950)
25- 26 I2 arcsec DEs Declination (1950)
28- 33 F6.4 Jy LW2 ? LW2 (5-8.5µm) filter magnitude
35- 40 F6.4 Jy LW3 ? LW3 (12-18µm) filter magnitude
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Acknowledgements: Goran Olofsson
(End) Patricia Bauer [CDS] 30-Aug-2000