2005A&A...437..919T

Query : 2005A&A...437..919T

2005A&A...437..919T - Astronomy and Astrophysics, volume 437, 919-928 (2005/7-3)

Search for new T Tauri stars in the Cepheus-Cassiopeia region.

TACHIHARA K., NEUHAEUSER R., KUN M. and FUKUI Y.

Abstract (from CDS):

The Cepheus-Cassiopeia star-forming region has been searched for new T Tauri stars (TTSs) based on the ROSAT all sky survey (RASS). Optical spectroscopic observations were carried out toward 45 GSC stellar counterparts of RASS sources looking for the Li absorption line (6708Å), a sign of youth. The detection of this line resulted in finding 11 to 16 new TTSs in this region. Using follow-up optical photometric observations and evolutionary models these Li-rich stars are revealed to be young low-mass stars. The most of the young stars are separated from the 13CO molecular clouds by ∼10pc, significantly more than in Chamaeleon. A group of the new TTSs are isolated from the CO clouds and distributed inside the previously determined CO void. Possible formation scenarios including the interaction with the supernova shock for the isolated TTSs are discussed.

Abstract Copyright: ∼

Journal keyword(s): ISM: clouds - ISM: molecules - stars: formation - stars: late-type - stars: pre-main sequence - X-rays: stars

Nomenclature: Tables 1, 2: [TNK2005] NN (Nos 1-46). Table 3: [TNK2005] NNcN N=5x2.

Simbad objects: 80

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Number of rows : 80
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 TYC 4306-1190-1 * 00 00 02.0702310000 +73 39 46.277572356   13.00 11.93     G8IV 2 0
2 TYC 4496-2286-1 * 00 01 42.5559844272 +77 31 06.202875360   13.15 12.02     ~ 2 0
3 1RXS J002827.8+785750 EB* 00 28 27.9684836736 +78 57 42.657327180   11.23 10.60 10.204 9.854 ~ 12 0
4 RX J0038.0+7903 Y*? 00 38 06.1345473672 +79 03 20.641016124 11.74 11.272 10.395 10.181 9.60 K1V 15 0
5 1RXS J003904.2+791912 EB* 00 39 06.2053872312 +79 19 09.608342484   13.09 11.96     K6 7 0
6 GSC 04307-01640 * 00 46 22.3550751432 +74 12 48.875476644   12.7       F3IV 2 0
7 IREC 169 DNe 00 48 +72.5           ~ 4 0
8 1RXS J005300.8+682125 Ro* 00 53 00.4360276224 +68 21 22.606838928   13.088 12.115 11.951   K1V 5 0
9 TYC 4304-1407-1 * 01 01 17.3328754872 +71 31 12.655784640   11.74 10.73     G5III 2 0
10 V* V1065 Cas EB* 01 09 28.8661489800 +68 39 14.762673432   11.43 10.31     ~ 5 0
11 NAME Loop III SR? 01 12 +78.3           ~ 90 1
12 TYC 4305-1893-1 SB* 01 19 34.4296385016 +71 30 31.820752116   12.14 11.38     F8V 2 0
13 GSC 04309-00722 PM* 01 29 29.1128289000 +74 44 49.562059668   13.96 12.87 12.59   ~ 2 0
14 TYC 4314-1757-1 SB* 01 39 25.9229351520 +70 18 50.008916016   10.83 10.16     G0V 4 0
15 GSC 04499-02076 * 02 20 37.1529081816 +77 44 13.322549220   11.9       K0III-IV 2 0
16 LDN 1333 DNe 02 26 04 +75 28.5           ~ 60 0
17 GSC 04312-00734 * 02 26 12.8276832768 +68 11 32.923933440   12.798 12.113 12.120   ~ 2 0
18 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3435 0
19 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4416 0
20 NAME eta Cha Association OpC 08 42 32.9 -78 57 47           ~ 363 0
21 IC 2602 OpC 10 42 27.1 -64 25 34           ~ 675 0
22 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
23 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
24 TYC 4589-2335-1 SB* 20 05 48.9053098320 +77 05 53.110331916   12.61 11.06     ~ 2 0
25 RX J2011.8+7834 * 20 11 53.6857625644 +78 34 37.390625233   12.237 11.466 11.404   ~ 2 0
26 TYC 4244-322-1 PM* 20 14 26.1188051376 +66 05 19.963808196   12.28 11.57     K3V 3 0
27 GSC 04241-01092 * 20 19 48.5601823846 +65 34 09.555669276       11.803   ~ 2 0
28 TYC 4589-1101-1 * 20 20 29.3715826032 +78 07 22.258511508   11.13 10.33     F4V 5 0
29 ASAS J202515+7336.6 Y*O 20 25 15.4127038416 +73 36 33.370528644   11.53 10.70     G9.5IV 8 0
30 TYC 4451-1270-1 * 20 33 43.7981717304 +70 53 18.943707372   13.35 11.62     ~ 3 0
31 GSC 04451-00172 * 20 38 13.7624360880 +69 24 12.713622048   12.8       K5V 2 0
32 TYC 4455-856-1 * 20 43 28.3613737032 +71 15 46.590175836   12.73 12.26     ~ 2 0
33 GSC 04594-01127 * 20 53 12.0615642312 +79 20 21.863962824   12.4       ~ 2 0
34 TYC 4255-314-1 EB* 20 56 09.4185725664 +65 10 31.311106968   10.83 10.34     ~ 3 0
35 IRAS 20582+7724 Y*O 20 57 12.9250225656 +77 35 43.656301932           ~ 117 0
36 LDN 1228 DNe 20 57 13 +77 35.8           ~ 128 0
37 TYC 4586-348-1 * 21 04 20.9501914944 +75 04 05.013126336   11.83 11.14     G2V 4 0
38 ASAS J211025+7045.9 Ro* 21 10 24.5218627176 +70 45 57.562924284   11.79 11.00     K1V 5 0
39 ASAS J211129+7614.5 Ro* 21 11 29.3394799944 +76 14 28.942565172   12.46 11.50     K1V 6 0
40 TYC 4460-1614-1 * 21 11 43.8881970480 +68 54 23.163893928   11.21 10.57     ~ 2 0
41 GSC 04465-01410 RS* 21 32 53.8789261776 +70 37 43.683052764   12.0       K0III-IV 3 0
42 ASAS J213747+8032.5 Ro* 21 37 47.5780775328 +80 32 31.190282124   12.50 11.42     K0III 4 0
43 TYC 4607-611-1 * 21 42 57.6553579728 +80 30 19.630379952   12.06 11.46     ~ 2 0
44 LDN 1241 DNe 21 50.0 +76 44           ~ 19 0
45 MBM 163 MoC 21 53.1 +80 29           ~ 3 0
46 MBM 164 MoC 21 56.1 +80 49           ~ 2 0
47 MBM 165 MoC 21 58.1 +80 46           ~ 3 0
48 ASAS J220525+6552.3 Ro* 22 05 25.8003578952 +65 52 19.827946056   11.69 10.98     G1IV 4 0
49 LDN 1243 DNe 22 10.3 +75 09           ~ 9 0
50 GSC 04608-01986 Y*O 22 11 11.2394504544 +79 18 00.031244040   12.5       K5V 4 0
51 ASAS J221157+6819.9 Ro* 22 11 57.8130857688 +68 19 52.502279124   12.51 11.73     ~ 5 0
52 LDN 1247 DNe 22 21.9 +75 06           ~ 18 0
53 RX J2227.1+6521 Y*? 22 27 05.2527196704 +65 21 31.332143448   13.726 12.788 12.533   K3.5IIIb 4 0
54 LDN 1221 DNe 22 28 02.9 +69 01 13           ~ 50 0
55 LDN 1242 DNe 22 31.2 +73 15           ~ 5 0
56 2MASS J22334483+7033181 LP* 22 33 44.8409495832 +70 33 18.245812680   12.89 11.13     G8IV-V 6 0
57 LDN 1251 DNe 22 36.1 +75 16           ~ 111 0
58 2MASS J22395815+7749394 Y*? 22 39 58.1747223984 +77 49 39.469461312   12.49 11.93     K2V 5 0
59 TYC 4601-1894-1 * 22 51 35.7015990456 +76 35 53.762207748   12.51 11.93     ~ 3 0
60 RX J2300.7+7728 * 23 00 44.5735498608 +77 28 38.510016564   11.78 11.41     K1V 8 0
61 1RXS J230533.0+782238 Ro* 23 05 36.4932339816 +78 22 38.958385800   13.950 12.806 12.497   K4V 5 0
62 TYC 4601-938-1 SB* 23 07 56.5615269600 +76 51 47.725451532   11.89 10.71     ~ 2 0
63 RX J2309.7+7357 ** 23 09 43.46592 +73 57 14.8644           K7e 4 0
64 TYC 4605-170-1 Y*O 23 16 18.3331321032 +78 41 55.954965876   12.70 11.74     K3V 8 0
65 LDN 1259 DNe 23 22.9 +74 16           ~ 11 0
66 LDN 1262 MoC 23 25 47 +74 17.6           ~ 134 0
67 LDN 1261 DNe 23 27.0 +74 17           ~ 11 0
68 NAME Cepheus Flare MoC 23 34 +72.0           ~ 128 0
69 GSC 04479-00348 * 23 43 41.9747394240 +68 46 27.115081392   12.6       K2V 3 0
70 ASAS J235111+7858.0 Y*O 23 51 10.1347727784 +78 58 04.973214072   12.39 11.24     K2V 7 0
71 LDN 1260 DNe 23 57.0 +64 57           ~ 5 0
72 LDN 1274 MoC 23 57.5 +70 57           ~ 8 0
73 NGC 7790 OpC 23 58 27.1 +61 12 36   9.18 8.5     ~ 272 0
74 [TNK2005] 5c2 TT* ~ ~     14.12     ~ 1 0
75 NAME Gould Belt PoG ~ ~           ~ 873 1
76 NAME Cas-Cep Region vid ~ ~           ~ 16 0
77 [TNK2005] 4c2 TT* ~ ~     13.86     K7 1 0
78 [TNK2005] 43c2 TT* ~ ~     15.55     ~ 1 0
79 [TNK2005] 37c2 TT* ~ ~     14.86     F4 1 0
80 [TNK2005] 36c2 TT* ~ ~     14.69     ~ 1 0

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