2000A&A...356..157L

Query : 2000A&A...356..157L

2000A&A...356..157L - Astronomy and Astrophysics, volume 356157-162 (2000/4-1)

New discovery of weak-line T Tauri stars in high-Galactic latitude molecular clouds.

LI J.Z., HU J.Y. and CHEN W.P.

Abstract (from CDS):

Star formation efficiency in translucent molecular clouds has long been an unresolved and key issue in the field of low-mass star formation. In this paper, we report on the results of our survey for low-mass star formation in high-Galactic latitude molecular clouds, especially those of the translucent category, based on the ROSAT All-Sky Survey. Nine new weak-line T Tauri star candidates have been discovered at high-Galactic latitudes, among which, 6 are seen against - thus possibly associated with - the translucent molecular clouds, MBM 16, MBM 19 and MBM 55. Further study on the Li-rich X-ray active sources is necessary to shed more light on star formation in translucent molecular clouds.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - ISM: clouds

Nomenclature: Tables 1, 2: [LHC2000] JHHMMSS.ss+DDMMSS.s N=42, [LHC2000] 1RXS JHHMMSS.s+DDMMSSW N=6.

Simbad objects: 65

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Number of rows : 65
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 MBM 7 MoC 02 22 23.5 +19 53 38           ~ 50 0
2 MBM 12 MoC 02 56 50 +19 32.0           ~ 230 1
3 * 47 Ari PM* 02 58 05.2213070040 +20 40 07.442238720   6.230   5.6   F0V(e) 201 0
4 PM J03147+1127 TT* 03 14 47.1951695856 +11 27 27.436831488     12.988 12.639   M2.0V 20 0
5 MBM 16 MoC 03 19 04.1 +11 34 52           ~ 67 0
6 RX J0319.4+1247 Or* 03 19 24.7982529144 +12 47 28.580049636   11.06 10.184   9.245 G2IV 11 0
7 G 5-32 PM* 03 23 22.4185912464 +11 41 13.354333008   13.76   11.840   M3.5Ve 45 0
8 HD 21051 TT* 03 24 10.1286587232 +12 37 46.532952372   7.246 6.046     K0III-IV 56 0
9 RX J0326.3+1131A TT* 03 26 21.2583233856 +11 30 54.139731508   15.406 14.442 14.795   M2Ve 11 0
10 RX J0328.0+1114 TT* 03 28 02.48 +11 14 23.1   17.035 15.385 15.246   M3Ve 6 0
11 LDN 1569 MoC 04 02.4 +01 18           ~ 49 0
12 HD 25457 TT* 04 02 36.7442719512 -00 16 08.119921152   5.88 5.38     F7V 293 0
13 RX J0405.6+0140 TT* 04 05 37.0912453172 +01 40 38.291031933   17.126 15.559 15.556   M4Ve 10 0
14 2MASS J04053926+0140277 * 04 05 39.2620845576 +01 40 27.623224020   14.1       F5V 3 0
15 HD 26913 BY* 04 15 25.7871375264 +06 11 58.751401236 7.790 7.580 6.920 6.554 6.195 G6V 243 0
16 HD 26923 PM* 04 15 28.8004060272 +06 11 12.698572488 6.910 6.860   5.9   G0IV 236 0
17 [DB2002b] G186.03-29.93 MoC 04 16.0 +06 58           ~ 11 0
18 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
19 BD-15 808 TT* 04 32 43.5101790600 -15 20 11.350861080   11.28 10.588   9.724 G4V 24 0
20 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
21 LDN 1642 MoC 04 35 18 -14 13.9           ~ 157 0
22 2MASS J04352071-1454462 * 04 35 20.7168528264 -14 54 46.349044848           K7 6 0
23 1RXS J073101.9+460030 PM* 07 31 01.2936368256 +46 00 26.423800488   15.899 14.306 13.838   M4.0V 26 0
24 1RXS J073138.4+455718 SB* 07 31 38.4959973048 +45 57 17.278351380     13.851 13.469   M3 15 0
25 HD 59555 PM* 07 32 39.9270346920 +46 32 05.450771184   8.29 7.65     G5 29 0
26 [DB2002b] G171.83+26.72 MoC 07 35.9 +46 41           ~ 15 0
27 [DB2002b] G172.27+26.97 MoC 07 37 49.8 +46 21 12           ~ 13 0
28 LEDA 3095768 Sy1 07 42 27.0835156656 +46 56 43.005441660   17.95 17.60     ~ 31 0
29 RX J0846.9+7044 * 08 46 58.4 +70 44 52           F5V 5 0
30 [DB2002b] G141.33+34.45 MoC 08 49 02.2 +72 36 55           ~ 25 0
31 HD 75632 ** 08 55 24.818472 +70 47 39.17616   10.376   7.8   M1V+M1V 124 0
32 [DB2002b] G141.43+35.20 MoC 08 57 53.4 +72 16 26           ~ 20 0
33 RX J0904.2+7259 Bla 09 04 16.8065731698 +72 59 45.759368702           G3V 9 1
34 [DB2002b] G142.27+36.17 MoC 09 06.1 +71 16           ~ 24 0
35 MBM 30 MoC 09 28 43.0 +70 24 55           ~ 28 0
36 * d UMa RS* 09 34 28.8594727848 +69 49 49.226541888 5.67 5.34 4.57 3.91 3.50 G5III-IV 315 0
37 MBM 40 MoC 16 10 34 +21 49.3           ~ 76 0
38 LEDA 89171 Sy1 21 09 09.9697330176 -09 40 14.755152216   14.95 14.39 12.7   ~ 117 0
39 [DB2002b] G40.54-35.47 MoC 21 11.5 -09 43           ~ 15 0
40 1RXS J211208.1-085004 * 21 12 11.195 -08 49 58.30   14.572 13.818     K0V 6 0
41 [DB2002b] G41.00-35.85 MoC 21 13.6 -09 33           ~ 10 0
42 [DB2002b] G40.57-36.61 MoC 21 15.7 -10 11           ~ 10 0
43 MBM 49 MoC 21 26 19.7 +12 18 02           ~ 14 0
44 4U 2129+12 LXB 21 29 58.3124 +12 10 02.670 14.50 15.70 15.8     ~ 326 1
45 PM J22561-0009 PM* 22 56 08.2043974632 -00 09 59.574733992   14.0 12.437 11.987   K7 12 0
46 [DB2002b] G73.31-51.52 MoC 22 58.3 +00 06           ~ 9 0
47 V* AZ Psc RS* 22 58 52.9208004120 -00 18 57.378808512   8.44       K0III 57 0
48 [DB2002b] G74.42-51.25 MoC 22 59.6 +00 46           ~ 6 0
49 LEDA 1465674 SyG 23 03 27.9401705184 +14 43 49.301296320   16.4       ~ 11 0
50 V* KU Peg RS* 23 05 29.2735048704 +26 00 33.459393312   8.79 7.66     G9IV(e) 66 0
51 HD 218235 PM* 23 06 18.1409322336 +18 31 03.956259072   6.57   5.9   F6Vs 108 0
52 G 67-46 SB* 23 06 23.8428546600 +12 36 26.600178596       11.014   K5V 37 0
53 HD 218261 PM* 23 06 31.8853045584 +19 54 39.072222792   6.79   6.1   F6V 112 0
54 ACT-CL J2307.0+1631 ClG 23 07 02.317 +16 32 13.12     13.78     G0IV 21 0
55 2MASS J23070237+1632125 * 23 07 02.3815874472 +16 32 12.694813476           F5V 1 0
56 * 56 Peg SB* 23 07 06.7418870416 +25 28 05.773861158 7.20 6.06 4.74 3.74 3.07 K0.5II:Ba1CN-2CH-0.5 270 0
57 [LHC2000] 1RXS J230624.3+123629E * 23 07 13.40 +12 37 17.3           M3IV 1 0
58 BD+16 4872 SB* 23 07 52.7057432928 +17 10 15.252477852   11.86 10.822 10.60 9.461 K3IVe 15 0
59 MBM 53 MoC 23 08 07.3 +22 56 15           ~ 50 0
60 [DB2002b] G89.19-40.94 MoC 23 08 24 +15 05.3           ~ 87 0
61 MBM 54 MoC 23 09.3 +18 29           ~ 51 0
62 AG+14 2584 PM* 23 09 54.9408251472 +14 25 35.548951620       9.756   K5V 26 1
63 HD 218687 PM* 23 09 57.1008226656 +14 25 35.591442888   7.14 6.54     G0V 81 0
64 2MASS J23101857+1447203 TT* 23 10 18.5886129552 +14 47 20.208427152           M4 10 0
65 StKM 1-2106 BY* 23 12 29.0226794544 +17 09 21.754146240   12.23 11.107 10.74 9.536 K5 15 0

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