1994A&A...292..249K

Query : 1994A&A...292..249K

1994A&A...292..249K - Astronomy and Astrophysics, volume 292249-260 (1994/12-1)

Study of L1340: a star-forming cloud in Cassiopeia.

KUN M., OBAYASHI A., SATO F., YONEKURA Y., FUKUI Y., BALAZS L.G., ABRAHAM P., SZABADOS L. and KELEMEN J.

Abstract (from CDS):

We report results of radio, optical and IRAS observations aimed at revealing some basic properties of the dark cloud Lynds 1340 (α1950=2h26.0min, δ1950=+72deg44'). Study of the cumulative distribution of field star distance moduli and photometry of stars embedded in reflection nebulae within the cloud yield distance values close to 600pc for L1340. 13CO and C18O observations reveal three dense cores within the cloud having masses of 280, 470 and 180M☉, respectively. Young stellar object candidates, namely IRAS point sources, Hα emission stars and stars illuminating reflection nebulae are found to be associated with the cores. We detected 13 Hα emission stars within the area of the cloud on objective prism plates. They can be regarded as candidate pre-main sequence stars born in the cloud. 22 IRAS point sources with flux density distribution characteristic of young stellar objects are found in the cloud area. Seven of them can be associated with Hα emission stars. We give objective prism spectral types and photoelectric UBV magnitudes for the stars illuminating reflection nebulosities within the cloud. The young stellar population associated with the cloud apparently contains four B and A type stars illuminating reflection nebulae and 17 low and intermediate mass pre-main sequence star candidates appearing as IRAS point sources and Hα emission stars. Nine IRAS point sources have infrared colours characteristic of deeply embedded protostellar objects. The surface distribution of the young stellar object candidates closely correlates with the three cores of the cloud.

Abstract Copyright: ∼

Journal keyword(s): interstellar medium: clouds, LDN 1340 - stars: pre-main sequence - ISM: molecules - radio lines: ISM

Nomenclature: Table 1: [KOS94] AN (Nos R1-R4), Table 2: [KOS94] C18O A N=3, Table 3: [KOS94] 13CO A N=3, Table 5: [KOS94] HA NN N=13, Table 6: [KOS94] IRAS NN N=24

Errata: erratum vol. 292 p. 935

Simbad objects: 61

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Number of rows : 61
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 BD+73 127 * 02 21 00.7526938656 +73 41 20.154581556   10.02 9.60     F0 3 0
2 BD+70 169 PM* 02 23 00.6795408528 +71 10 36.867411523   9.79   8.4   K1 38 0
3 IRAS 02214+7238 FIR 02 26 09.9 +72 51 33           ~ 2 0
4 [KOS94] IRAS 1 IR 02 26 09.9 +72 51 33           ~ 1 0
5 IRAS 02224+7227 Y*O 02 27 05.5430134248 +72 41 16.771673652           ~ 9 0
6 IRAS 02232+7250 IR 02 27 58.4 +73 04 05           ~ 3 0
7 [KOS94] IRAS 3 IR 02 27 58.8 +73 04 08           ~ 1 0
8 BD+72 131 * 02 28 10.3139597880 +73 02 19.809463704 10.332 10.090 9.977 9.864 9.668 B5 8 0
9 2MASS J02281661+7237328 TT* 02 28 16.6236144000 +72 37 33.019187952 17.386 16.606 15.312 14.429 13.386 G2 13 0
10 2MASS J02281782+7238009 TT* 02 28 17.8328405424 +72 38 00.988364292 19.375 18.262 16.763 15.793 14.739 K1 5 0
11 NAME Majaess 29 OpC 02 28 18 +72 37.8           ~ 20 1
12 [KOS94] HA 3 Em* 02 28 24.3 +72 34 35           ~ 1 0
13 [KOS94] IRAS 6 IR 02 28 32.8 +72 35 27           ~ 1 0
14 IRAS 02238+7222 mul 02 28 33.2 +72 35 30           ~ 7 0
15 LDN 1340A PoC 02 28 36 +72 35.9           ~ 6 1
16 2MASS J02285180+7239143 TT* 02 28 51.7903574376 +72 39 14.360886936 18.727 17.944 16.494 15.577 14.637 K4 5 0
17 [KOS94] IRAS 8 IR 02 28 52.0 +72 39 17           ~ 1 0
18 [KOS94] IRAS 7 IR 02 28 55.2 +73 17 33           ~ 1 0
19 IRAS F02242+7246 IR 02 28 59.0 +72 59 47           ~ 2 0
20 [KOS94] IRAS 9 IR 02 28 59.0 +72 59 47           ~ 1 0
21 TYC 4320-1155-1 * 02 29 03.1875293424 +72 59 36.573010980 13.318 11.838 11.562 11.300 11.048 A0 4 0
22 [KOS94] HA 6 Em* 02 29 05.7685859256 +73 02 24.364729176           ~ 1 0
23 LBN 130.06+11.55 RNe 02 29 11 +72 59.5           ~ 8 0
24 [KOS94] IRAS 10 IR 02 29 15.1 +72 48 16           ~ 1 0
25 [KOS94] HA 7 Em* 02 29 15.1 +72 48 16           ~ 1 0
26 [KOS94] HA 8 Em* 02 29 17.7 +73 05 00           ~ 1 0
27 TYC 4320-62-1 * 02 29 20.0930 +73 04 54.562 12.743 10.733 10.388 10.100 10.018 B4 3 0
28 2MASS J02292109+7258120 TT* 02 29 21.1034753424 +72 58 12.034087932 16.880 16.062 14.852 14.098 13.351 G3 6 0
29 [KOS94] IRAS 11 IR 02 29 23.3 +73 02 22           ~ 1 0
30 IRAS F02246+7248 IR 02 29 23.3 +73 02 22           ~ 3 0
31 IRAS F02247+7245 IR 02 29 29.1 +72 59 03           ~ 4 0
32 [KOS94] IRAS 12 IR 02 29 29.1 +72 59 03           ~ 1 0
33 2MASS J02293037+7311429 TT* 02 29 30.3813111696 +73 11 42.917896752           K6 6 0
34 [KOS94] IRAS 13 IR 02 29 37.8 +72 44 37           ~ 1 0
35 [KOS94] IRAS 14 IR 02 29 42.2 +72 43 56           ~ 1 0
36 IRAS 02249+7230 IR 02 29 43.223 +72 43 59.35           ~ 12 0
37 IRAS 02257+7249 Y*O 02 30 20.6130220896 +73 02 33.848699100           ~ 6 0
38 IRAS F02257+7245 IR 02 30 31.0 +72 59 19           ~ 4 1
39 [KOS94] IRAS 16 IR 02 30 31.0 +72 59 19           ~ 1 0
40 ZTF J023032.45+725917.8 TT* 02 30 32.4807823008 +72 59 17.750135184 16.619 16.308 15.536 15.053 14.489 G7 18 0
41 LDN 1340 DNe 02 30 40 +72 57.3           ~ 35 0
42 TYC 4320-1026-1 * 02 30 49.9681844832 +73 01 09.942161700 12.757 11.410 11.164 10.918 10.629 A2 4 0
43 IRAS 02263+7251 FIR 02 31 06.4 +73 04 58           ~ 3 0
44 [KOS94] IRAS 17 IR 02 31 06.4 +73 04 58           ~ 1 0
45 IRAS 02267+7226 IR 02 31 27.19224 +72 40 15.9996           ~ 9 0
46 LDN 1340B PoC 02 31 30 +73 07.4           ~ 5 1
47 [KOS94] IRAS 19 IR 02 31 32.0 +72 41 15           ~ 1 0
48 IRAS F02268+7227 IR 02 31 32.0 +72 41 15           ~ 2 0
49 GSC 04320-00320 Or* 02 31 40.3082071296 +72 41 41.914420512 16.083 15.544 14.515 13.646 12.909 F4 16 0
50 LDN 1340C PoC 02 31 43 +72 38.9           ~ 6 1
51 [KOS94] IRAS 20 Y*O 02 32 23.73336 +72 39 52.6032 17.340 16.338 14.977 14.095 13.162 K4 5 0
52 [KOS94] IRAS 21 Y*O 02 32 26.53608 +72 39 19.8360           ~ 2 0
53 IRAS 02276+7225 TT* 02 32 38.9735508792 +72 39 03.880739628 18.879 17.552 15.935 14.898 13.813 K0 11 0
54 [KOS94] IRAS 23 IR 02 32 53.8 +72 44 18           ~ 1 0
55 [KOS94] HA 11 Em* 02 33 01.2 +72 43 29           K7-M0 5 0
56 [KOS94] IRAS 24 IR 02 33 02.3 +72 43 30           ~ 1 0
57 IRAS 02283+7230 IR 02 33 02.7 +72 43 30           ~ 6 0
58 [KOS94] HA 12 Em* 02 33 24.7 +72 43 55           ~ 1 0
59 HD 15472 Be* 02 33 26.5991128224 +70 57 23.417052192   7.92 7.91     B2.5III-IVe 42 0
60 2MASS J02350799+7251034 TT* 02 35 07.9965784968 +72 51 03.530143764           K4 5 0
61 HD 16505 * 02 42 22.6786592328 +68 03 51.625105560   8.315 7.055     K3III 24 0

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