1996A&A...311..981T

Query : 1996A&A...311..981T

1996A&A...311..981T - Astronomy and Astrophysics, volume 311981-988 (1996/7-3)

Star formation in L 1251. II. "The next generation" - NH3 cores.

TOTH L.V. and WALMSLEY C.M.

Abstract (from CDS):

We have mapped the NH3(1,1) and (2,2) transitions towards the L 1251 dark cloud . Our observations covered an area of 0.12 square degrees sampled at intervals of 80" (2 times the HPBW). We detected eight ammonia cores with typical sizes (at half power) of 2' (0.2pc at 350pc distance). We estimate that the cores have a maximum H2 density of order 105cm–3 and average Tkin of 10K. Their masses are in the range of 5-34M☉ and they typically are close to virial equilibrium, By comparison with earlier maps of C18O, we estimate the fraction of the cloud material in the form of dense (>104cm–3) cores to be of order 40 percent.

Abstract Copyright: ∼

Journal keyword(s): interstellar medium: clouds - molecules - individual objects: L 1251 (LDN 1251) - Cepheus Flare

Nomenclature: Table 1: [TW96] AN (Nos H1-H3) and (Nos T1-T4), [TW96] A No. N (the letter 'N')

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
2 LDN 1243 DNe 22 10.3 +75 09           ~ 9 0
3 LDN 1247 DNe 22 21.9 +75 06           ~ 18 0
4 [TW96] T4 PoC 22 28 05.5 +75 13 22           ~ 4 0
5 IRAS 22290+7458 Y*O 22 29 59.537 +75 14 04.41           ~ 27 1
6 [KP93] 3-5 Y*O 22 30 31.3 +75 13 38           ~ 6 0
7 LDN 1251A DNe 22 30 31.8 +75 14 17           ~ 76 2
8 [TW96] T1 PoC 22 31 02.4 +75 13 39           ~ 5 0
9 IRAS 22331+7502 Or* 22 34 11.9044831272 +75 18 10.099564812   17.12 15.42 13.80 12.53 K5 19 0
10 IRAS 22343+7501 Y*O 22 35 24.42480 +75 17 03.7320     22.99 20.22 17.76 ~ 46 0
11 LDN 1251N DNe 22 35 56.6 +75 18 35           ~ 2 0
12 LDN 1251 DNe 22 36.1 +75 16           ~ 119 0
13 2MASS J22363545+7521352 Or* 22 36 35.4671292432 +75 21 35.311964472   21.26 19.82 17.48 15.09 ~ 15 0
14 HD 214710 * 22 37 12.9654175848 +75 22 18.520600224   7.359 5.777     M1III 36 0
15 [NJH2003] 5 PoC 22 37 53.5 +75 09 38           ~ 4 0
16 IRAS 22376+7455 TT* 22 38 42.5032929744 +75 11 45.489819660   17.65 16.10 14.90 13.62 ~ 53 0
17 [TW96] H2 PoC 22 38 54.8 +75 10 57           ~ 4 0
18 2MASS J22392717+7510284 TT* 22 39 27.2092248600 +75 10 28.452663084   17.06 15.79 14.70 13.44 ~ 19 0
19 [TW96] H1 PoC 22 39 37.2 +75 10 58           ~ 4 0
20 2MASS J22394030+7513216 Or* 22 39 40.2906438120 +75 13 21.554204016   19.05 17.01 15.24 13.56 K5 19 0
21 NAME Cepheus Flare MoC 23 34 +72.0           ~ 142 0
22 [K60] 193 DNe ~ ~           ~ 2 0

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