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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 117 77 The 77 ISOCAM sources identified as YSOs in the Serpens cluster table3.dat 117 71 *The 71 "blue" ISOCAM sources which have [14.3/6.7]←0.2.
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.
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
Bytes Format Units Label Explanations
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)
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, [CDF88] NN in Simbad CK: Churchwell & Koornneef, 1986ApJ...300..729C in Simbad EC: Eiroa & Casali, 1992A&A...262..468E, [EC92] NNN in Simbad GCNM: Giovannetti et al., 1998A&A...330..990G GEL: Gomez de Castro et al., 1988A&A...201..299G GGD: Gyulbudaghian et al., 1978ApJ...224L.137G978 HB: Hurt & Barsony, 1996ApJ...460L..45H, [HB96] PS N in Simbad HCE: Horrobin et al., 1997A&A...320L..41H, [EC92] NNN in Simbad HHR: Hodapp et al., 1996ApJ...468..861H HL: Hartigan & Lada, 1985ApJS...59..383H K: Kaas 1999AJ....118..558K, [K99d] YSO NN in Simbad MMW: McMullin et al., 1994ApJ...424..222M StRS: Stephenson 1992AJ....103..263S SCB: Straizys et al., 1996BaltA...5..125S, [SCB96] NNN in Simbad SMM: Casali et al., 1993A&A...275..195C, [CED93] N in Simbad STGM: Sogawa et al., 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, [SVS76] Ser NN in Simbad
Acknowledgements: Anlaug Amanda Kaas
(End) Patricia Bauer [CDS] 08-Apr-2004
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