J/A+A/421/623 ISOCAM survey of YSOs in Serpens Cloud Core (Kaas+, 2004)
The young stellar population in the Serpens Cloud Core: An ISOCAM survey.
Kaas A.A., Olofsson G., Bontemps S., Andre P., Nordh L., Huldtgren M.,
Prusti T., Persi P., Delgado A.J., Motte F., Abergel A., Boulanger F.,
Burgdorf M., Casali M.M., Cesarsky C.J., Davies J., Falgarone E.,
Montmerle T., Perault M., Puget J.L., Sibille F.
<Astron. Astrophys. 421, 623 (2004)>
=2004A&A...421..623K 2004A&A...421..623K
ADC_Keywords: Infrared sources ; YSOs ; Photometry, infrared
Mission_Name: ISO
Keywords: stars: formation - stars: pre-main-sequence -
stars: luminosity function, mass function -
stars: low-mass, brown dwarfs -
ISM: individual objects: Serpens Cloud Core
Abstract:
We present results from an ISOCAM survey in the two broad band filters
LW2 (5-8.5µm) and LW3 (12-18µm) of a 0.13 square degree coverage
of the Serpens Main Cloud Core. A total of 392 sources were detected
in the 6.7µm band and 139 in the 14.3µm band to a limiting
sensitivity of ∼2mJy. We identified 53 Young Stellar Objects (YSOs)
with mid-IR excess from the single colour index [14.3/6.7], and 8
additional YSOs from the H-K/K-m6.7 diagram. Only 32 of these 61
sources were previously known to be YSO candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 112 77 The 77 ISOCAM sources identified as YSOs in the
Serpens cluster
table3.dat 108 71 *The 71 "blue" ISOCAM sources which have
[14.3/6.7]←0.2.
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Note on table3.dat: Many of these are likely to be field stars, but some
could be young cluster members of Class III type. Colour correction applied.
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See also:
J/A+A/330/990 : VRIJHK photometry of the Serpens cloud core (Giovannetti+ 1998)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ISO ISO number
4 A1 --- m_ISO [ab] Note (1)
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 15 F4.1 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18 I1 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 24 I2 arcsec DEs Declination (J2000)
26- 30 F5.2 mag Jmag ? J magnitude (3)
31 A1 --- n_Jmag [b] Note on Jmag (1)
33 A1 --- leJmag Limit flag on e_Jmag
34- 38 F5.3 mag e_Jmag ? rms uncertainty on Jmag
40- 44 F5.2 mag Hmag ? H magnitude (3)
45 A1 --- n_Hmag [ab] Note on Hmag (1)
47 A1 --- leHmag Limit flag on e_Hmag
48- 52 F5.3 mag e_Hmag ? rms uncertainty on Hmag
54- 58 F5.2 mag Kmag ? K magnitude (3)
59 A1 --- n_Kmag [ab] Note on Kmag (1)
61 A1 --- leKmag Limit flag on e_Kmag
62- 66 F5.3 mag e_Kmag ? rms uncertainty on Kmag
68- 73 F6.1 mJy F6.7um ? Flux density at 6.7um (3)
74- 76 A3 --- n_F6.7um Note on F6.7um (2)
78- 81 F4.1 mJy e_F6.7um ? rms uncertainty on F6.7um
83- 88 F6.1 mJy F14.3um ? Flux density at 14.3um (3)
89- 91 A3 --- n_F14.3um Note on F14.3um (2)
93- 96 F4.1 mJy e_F14.3um ? rms uncertainty on F14.3um
98-117 A20 --- ID Other ID (4)
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Note (1): Notes on magnitudes:
a: H and K band data from the Arnica 1995 map, which is slightly
displaced from the 1996 map and therefore includes this object.
b: ISOCAM source is resolved into two sources in the near-IR, and the
near-IR fluxes are added.
Note (2): Notes on fluxes:
c: Flux measurement affected by proximity to the dead column. If the
dead column cannot be avoided by any of the redundant
observations, this flagging. If source is located on the dead
column, a flux measurement is not attempted at all.
d: Source close to the detector edge in all redundant observations.
e: Extended source.
f: ISOCAM source is not quite resolved from a bright neighbour.
g: Galaxy contamination? For fluxes ∼3mJy at 14.3µm the "red"
sample is expected to contain less than two galaxies in our
field according to hon03.
m: Flux might be affected by memory effects from other sources.
n: Nebulous sky background.
Note (3): Empty space means no measurement available in this work, while a
hyphen means no detection.
Note (4): Identifier acronyms are related to the following references:
CDF: Chavarria-K et al., 1988A&A...197..151C 1988A&A...197..151C, [CDF88] NN in Simbad
CK: Churchwell & Koornneef, 1986ApJ...300..729C 1986ApJ...300..729C in Simbad
EC: Eiroa & Casali, 1992A&A...262..468E 1992A&A...262..468E, [EC92] NNN in Simbad
GCNM: Giovannetti et al., 1998A&A...330..990G 1998A&A...330..990G
GEL: Gomez de Castro et al., 1988A&A...201..299G 1988A&A...201..299G
GGD: Gyulbudaghian et al., 1978ApJ...224L.137G 1978ApJ...224L.137G978
HB: Hurt & Barsony, 1996ApJ...460L..45H 1996ApJ...460L..45H, [HB96] PS N in Simbad
HCE: Horrobin et al., 1997A&A...320L..41H 1997A&A...320L..41H, [EC92] NNN in Simbad
HHR: Hodapp et al., 1996ApJ...468..861H 1996ApJ...468..861H
HL: Hartigan & Lada, 1985ApJS...59..383H 1985ApJS...59..383H
K: Kaas 1999AJ....118..558K 1999AJ....118..558K, [K99d] YSO NN in Simbad
MMW: McMullin et al., 1994ApJ...424..222M 1994ApJ...424..222M
StRS: Stephenson 1992AJ....103..263S 1992AJ....103..263S
SCB: Straizys et al., 1996BaltA...5..125S 1996BaltA...5..125S, [SCB96] NNN in Simbad
SMM: Casali et al., 1993A&A...275..195C 1993A&A...275..195C, [CED93] N in Simbad
STGM: Sogawa et al., 1997AJ....113.1057S 1997AJ....113.1057S
STGM3 = STGM 182709.0+010535 in Simbad
STGM2 = STGM 182711.4+010517 in Simbad
STGM14 = STGM 182721.2+011101 in Simbad
STGM8 = STGM 182735.3+010959 in Simbad
SVS: Strom et al., 1976AJ.....81..638S 1976AJ.....81..638S, [SVS76] Ser NN in Simbad
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Acknowledgements: Anlaug Amanda Kaas
(End) Patricia Bauer [CDS] 08-Apr-2004