2003A&A...398.1007K


Query : 2003A&A...398.1007K

2003A&A...398.1007K - Astronomy and Astrophysics, volume 398, 1007-1020 (2003/2-2)

A very young star forming region detected by the ISOPHOT Serendipity Survey.

KRAUSE O., LEMKE D., TOTH L.V., KLAAS U., HAAS M., STICKEL M. and VAVREK R.

Abstract (from CDS):

We present a multi-wavelength study of the star forming region ISOSS J 20298+3559, which was identified by a cross-correlation of cold compact sources from the 170µm ISOPHOT Serendipity Survey (ISOSS) database coinciding with objects detected by the MSX, 2MASS and IRAS infrared surveys. ISOSS J 20298+3559 is associated with a massive dark cloud complex (M∼760M) and located in the Cygnus X giant molecular cloud. We derive a distance of 1800 pc on the basis of optical extinction data. The low average dust temperature (T∼16K) and large mass (M∼120M) of the dense inner part of the cloud, which has not been dispersed, indicates a recent begin of star formation. The youth of the region is supported by the early evolutionary stage of several pre- and protostellar objects discovered across the region: I) two candidate Class 0 objects with masses of 8 and 3.5M, II) a gravitationally bound, cold (T∼12K) and dense (n(H2)∼2x105cm–3) cloud core with a mass of 50M and III) a Herbig B2 star with a mass of 6.5M and a bolometric luminosity of 2200L, showing evidence for ongoing accretion and a stellar age of less than 40000 years. The dereddened SED of the Herbig star is well reproduced by an accretion disc + star model. The externally-heated cold cloud core is a good candidate for a massive pre-protostellar object. The star formation efficiency in the central cloud region is about 14%.

Abstract Copyright:

Journal keyword(s): stars: formation - ISM: dust, extinction - ISM: clouds - ISM: individual objects: ISOSS J20298+3559

Nomenclature: Text: [KLT2003] FIR N (No. 1). Table 1: [KLT2003] SMM N (Nos 1-3), [KLT2003] Cold Core N=1. Table 2: [KLT2003] CN (Nos C1-C4). Table 4: [KLT2003] IRS N (Nos 1-8). Text: [KLT2003] Cluster N=1.

CDS comments: ISOSS J20278+3549 is a probable misprint for ISOSS J20298+3559. 2MASS J2029461+365852 is not in 2MASS.

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 RAFGL 618 pA* 04 42 53.6242032600 +36 06 53.400902220   16.32   12.59   C-rich 1003 0
2 [KLT2003] C4 Cld 20 29 31.9 +36 00 49           ~ 1 0
3 JCMTSF J202935.2+355812 Cld 20 29 35.1 +35 58 09           ~ 2 0
4 2MASS J20293603+3558179 * 20 29 36.0319090296 +35 58 17.918049468           ~ 2 0
5 [HBK2008] J20298+3559 SMM2 smm 20 29 45.6 +35 58 46           ~ 3 0
6 2MASX J20294585+3558464 IR 20 29 45.8317657632 +35 58 46.781944752           ~ 1 0
7 [KLT2003] Cluster Cl* 20 29 46 +35 58.8           ~ 1 1
8 [KLT2003] IRS 3 IR 20 29 46.1 +35 58 46           ~ 1 0
9 [KLT2003] IRS 4 IR 20 29 46.1 +36 58 52           ~ 1 0
10 2MASS J20294641+3558497 NIR 20 29 46.41 +35 58 49.7           ~ 1 0
11 [KLT2003] C1 Cld 20 29 46.8 +35 59 30           ~ 1 0
12 2MASS J20294785+3601083 LP* 20 29 47.8590440088 +36 01 08.328320328           ~ 4 0
13 IRAS 20278+3549 Y*O 20 29 47.9309721984 +35 59 26.478448044   16.93 15.32 14.90   B2 10 0
14 [KLT2003] Cold Core smm 20 29 48.4 +35 58 57           ~ 1 0
15 JCMTSF J202949.5+355912 smm 20 29 49.9 +35 59 15           ~ 4 0
16 IRAS 20279+3547 IR 20 29 50.8 +35 57 39           ~ 1 0
17 2MASS J20295448+3557384 * 20 29 54.4869259008 +35 57 38.381503932           ~ 1 0
18 [KLT2003] C3 Cld 20 30 05.3 +36 00 07           ~ 1 0
19 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2473 1
20 * mu. Cep s*r 21 43 30.4595558543 +58 46 48.165937434 8.85 6.43 4.08 1.98 0.22 M2-Ia 673 1

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