1997A&A...326..221M

Query : 1997A&A...326..221M

1997A&A...326..221M - Astronomy and Astrophysics, volume 326221-227 (1997/10-1)

Hipparcos distances of X-ray selected stars: implications on their nature as stellar population.

MICELA G., FAVATA F. and SCIORTINO S.

Abstract (from CDS):

We present the parallaxes, measured by Hipparcos, for a sample of X-ray selected stars. The stars belong to the stellar sample of the Einstein Extended Medium Sensitivity Survey. They are all at galactic latitude |b|>20deg, and are generally far away from known star forming regions. Several of these stars show lithium abundance and activity level typical of very young stars with ages comparable to that of the Pleiades. We show that the majority of our sample stars are on the main sequence, with only ≃20% being giants. We do not find a significant presence of pre-main sequence stars in our sample, notwithstanding the fact that some of our stars have a considerable lithium abundance, showing that the stars observed are most likely young and active main-sequence objects.

Abstract Copyright: ∼

Journal keyword(s): astrometry - stars: activity - stars: late-type

Simbad objects: 88

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Number of rows : 88
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 HD 42 * 00 05 24.2984958120 +16 19 44.418262980   9.07 8.770     G0 27 0
2 HD 105 PM* 00 05 52.5447817152 -41 45 11.044988352   8.13 7.53     G0V 203 0
3 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8V 392 0
4 * 34 Psc * 00 10 02.2030016064 +11 08 44.936910060   5.456 5.530   5.58 B9Vn 139 0
5 * 34 Psc B * 00 10 02.3863375176 +11 08 37.821568416     10.37     G5Ve 103 0
6 V* LN Peg RS* 00 12 30.2951225569 +14 33 48.897713959   9.40   8.0   G8V+K5V 111 0
7 HD 3126 PM* 00 34 27.1714801752 -06 30 14.052355416   7.37 6.91     F4V 55 0
8 * p Eri ** 01 39 47.53953 -56 11 47.0997           K2V+K2V 71 0
9 * p Eri A PM* 01 39 47.8126958280 -56 11 35.944312380   6.549 5.685 6.36   K2V 165 0
10 V* AD Ari EB* 02 17 45.3994096032 +18 27 18.005518404 7.760 7.730 7.430     F0 35 0
11 V* FT Cet BY* 02 36 41.7624882231 -03 09 22.094410260 9.768 9.046 8.100 7.578 7.13 K1V 110 0
12 MCC 401 LM* 02 44 21.3746155920 +10 57 41.074845120   12.38 11.10 10.19   M0Ve 53 0
13 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 557 0
14 V* BZ Cet BY* 03 00 02.8119278075 +07 44 59.118374397 9.635 8.908 7.955 7.436 6.994 K2.5Vk 157 0
15 V* IR Eri RS* 03 02 32.6830414824 -15 16 21.424205136   9.30 8.45     K0V 53 0
16 BD-20 646 * 03 28 54.1419221544 -19 58 47.171271252   10.577 10.097 9.95   F8 42 0
17 V* AK For SB* 03 29 22.8752567640 -24 06 03.098788272   10.46 9.36     K3VkFe+0.4 54 0
18 HD 22853 SB? 03 40 09.3640170936 -01 53 48.319545480   8.37 7.27     K0III 26 0
19 HD 25102 SB* 03 59 40.4960115792 +10 19 49.359946008   6.762 6.340 6.097 5.860 F5V 156 0
20 * alf Ret PM* 04 14 25.4700044050 -62 28 25.692560378 4.90 4.27 3.36 2.71 2.27 G8IIIa: 129 0
21 HD 26736 BY* 04 14 32.3145372576 +23 34 29.798635044   8.711 8.047 7.691 7.356 G5V 245 0
22 HD 28867 Y*O 04 33 33.0491533 +18 01 00.189284   7.030 7.013     B9IVn 113 0
23 HD 30810 ** 04 51 12.5284595938 +11 04 04.881592537   7.322 6.753     F6V 201 0
24 V* V1005 Ori BY* 04 59 34.8342878424 +01 47 00.669818328   11.48 10.107 9.603 8.239 M0Ve 371 0
25 V* V1192 Ori RS* 05 00 08.2195942104 +03 17 12.024920724   8.75 7.503   6.223 K1/2III 89 0
26 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1080 0
27 HD 37484 * 05 37 39.6269435064 -28 37 34.655407824   7.66 7.25   6.79 F4V 108 0
28 * nu.02 Col PM* 05 37 44.6176295592 -28 41 22.884909396   5.77 5.31     F5V 110 0
29 HD 48189 BY* 06 38 00.3532489704 -61 32 00.114167796         5.46 G1VCH-0.5 152 0
30 HD 51067 SB* 07 04 03.9289613557 +75 13 39.118436309   7.68   6.8   G0 69 1
31 HD 51067B PM* 07 04 05.6767728072 +75 13 49.926549324   8.99   7.7   G5 51 0
32 HD 51066 SB* 07 04 15.0575559672 +75 24 40.594373964   7.94 7.00     G8IIb-IIIae 45 1
33 HD 65916 * 08 01 35.2991346432 +14 02 25.980872748   9.12 8.38     G5 15 1
34 BD+63 765 * 08 14 39.6821674800 +62 56 11.156034336   9.99 9.31     G0 24 0
35 V* FK Cnc BY* 08 33 04.9766995680 +11 16 05.431480284   8.65 7.93     G0 41 0
36 HD 74607 PM* 08 45 29.5865030040 +18 49 02.962011576   7.14 6.76     F2 37 0
37 * 5 LMi PM* 08 50 32.2228174512 +33 17 06.195898140   6.738 6.210     F7Vs 192 0
38 BD+20 2233 PM* 08 54 00.5026177848 +20 13 49.427873688   9.08 8.61     F7V 29 0
39 V* V415 Hya gD* 09 25 27.0318666792 -06 24 16.279815204   7.29 7.00     A5II(m) 32 0
40 HD 80388 * 09 26 28.7581448760 +78 26 16.104703020   8.90 8.30     G1V 50 1
41 HD 80389 * 09 26 29.9537573424 +78 25 47.116353504   9.33 8.65     M2 31 1
42 BD+40 2208 SB* 09 27 28.3701825384 +39 30 17.914197996   11.092 9.845 9.453   K4V 52 0
43 HD 85270 * 09 50 55.0950587128 +08 07 38.169667898   8.64 7.69     G5 22 0
44 AC +67 3388 PM* 09 58 30.0421757688 +67 03 16.002900972       9.7   M0V 29 0
45 HD 87777 SB* 10 07 35.0496818112 +13 01 44.022538740   8.98   8.0   F8 41 0
46 BD-09 3055 SB* 10 22 17.9942164845 -10 32 15.573361499   12.15 11.01     K4+Vk 33 0
47 HD 90208 SB* 10 24 58.5677685264 +12 43 48.737965656 8.750 8.610 8.250     A2 22 0
48 HD 97334 BY* 11 12 32.3503039560 +35 48 50.688978228   7.02 6.41     G2 306 0
49 HD 97371 PM* 11 12 44.2787534544 +35 49 48.474187896   8.228 7.205     G9 32 0
50 V* TT Hya SB* 11 13 12.4976326464 -26 27 54.253972800   7.43 7.31     F0IV:kA2mA3:_sh 193 0
51 V* VV Crt SB* 11 30 26.0885455032 -15 19 19.750191960   10.06 9.391   8.706 G2V 40 0
52 BD+36 2219 LM* 11 51 07.3365505565 +35 16 19.248218463   11.30 9.802 9.420 7.64 M1.5V 210 0
53 HD 105881 * 12 11 09.7165760448 +39 07 48.712530144   8.42 8.0 7.8   F5 55 0
54 HD 106400 SB* 12 14 20.9962522128 +11 49 09.387358680   10.05 9.318 9.37 8.390 G8V 232 0
55 V* IL Com RS* 12 25 02.2563809088 +25 33 38.383306020   8.63 8.14     F8 161 0
56 HD 112542 PM* 12 57 26.2364022504 +01 25 40.787538334   7.35 6.90     F3V 42 0
57 BD+36 2322 BY* 12 57 40.2569835641 +35 13 29.629213095   12.02 10.52 10.137   M0V+M4/5V 242 1
58 HD 112733 PM* 12 58 31.9698234816 +38 16 43.556629692   9.41 8.63     G5 52 0
59 BD+39 2587 SB* 12 58 35.0000764728 +38 16 48.453734316   10.18 9.31     K3V 43 0
60 HD 114723 ** 13 12 02.04738 +32 05 06.9764           F8 72 0
61 HD 117860 PM* 13 33 11.3140750320 -08 26 36.051691992   8.00 7.36     G2V 75 0
62 HD 118646 PM* 13 38 42.0709958256 -29 33 39.123093744   6.221 5.810     F3V 75 0
63 * 7 Boo * 13 53 12.9300854664 +17 55 58.327270932   6.551 5.709     G5III 74 0
64 HD 128787 PM* 14 39 40.9377292320 -26 43 25.172094576   7.44 6.99     F5V 44 0
65 CD-26 10417 ** 14 39 47.0250367116 -26 41 53.048173901   10.751 9.781 9.810   K4V 47 0
66 HD 129920 PM* 14 43 22.3288696488 +51 55 05.192625900   8.87 8.23     G2V 42 0
67 V* UV CrB SB* 15 22 25.3263055704 +25 37 26.926262328   8.53 7.26     K1III 78 0
68 * eta CrB ** 15 23 12.30535 +30 17 16.1701 5.60 5.56 4.98 4.50 4.22 G2V+G2V 198 0
69 V* GX Lib RS* 15 23 26.0566952568 -06 36 37.745079696   8.39 7.35     G8IVp 120 0
70 HD 138290 * 15 30 55.4332050912 +08 34 44.731399008   6.921 6.563     F2Vs 109 0
71 HD 139017 ** 15 35 21.0148649880 +09 08 06.428959044   9.33 8.13     G5 18 0
72 HD 139493 ** 15 35 57.0330054792 +54 37 49.802397168 5.880 5.840 5.790   5.72 A0Vn 58 0
73 HD 143600 Ro* 16 02 13.5553901832 -22 41 15.211826808   7.40 7.33     B9Vn 95 0
74 HD 149931 ** 16 36 48.9549252275 +26 31 55.838827043           F5 40 0
75 HD 149973 PM* 16 37 05.2723674528 +26 45 15.077429784   8.52 8.02     F5 24 0
76 HD 151067 * 16 41 06.2938504200 +62 18 28.778126616   7.32 7.19     B8V 39 0
77 * mu. Dra ** 17 05 20.12403 +54 28 12.0994           F6V+F6V 107 0
78 HD 155674 PM* 17 10 10.5073172544 +54 29 39.756848388   10.061 8.853     K6V 98 0
79 BD+54 1862 PM* 17 10 12.3552015024 +54 29 24.510961428   10.536 9.209 8.71   K6V 85 0
80 Ross 868 PM* 17 19 54.2077697528 +26 30 03.068999297   12.98 11.336 11.060 8.420 M3.5V 169 0
81 * ome Dra SB* 17 36 57.0943076755 +68 45 28.681533966   5.20 4.77 4.5   F4V 180 0
82 V* ET Dra Ro* 17 50 25.1179947720 +70 45 36.437554548   10.71 9.67     K2.5 49 1
83 BD+18 3497 PM* 17 55 44.8981205376 +18 30 01.385136504 11.495 10.35 9.151 8.427 7.824 K5V 91 0
84 V* LP Dra RS* 18 09 55.4986110768 +69 40 49.792233036       8.0   K2V 55 0
85 HD 175938 PM* 18 45 38.1708579288 +79 56 33.639620100 6.710 6.670 6.400     A8V 53 0
86 HD 218023 ** 23 05 14.8499556624 -44 11 38.495633676   10.49 9.908 9.76   G3/5V 25 0
87 BD+00 5017 ** 23 35 00.2767437606 +01 36 19.434711493 12.082 10.893 9.546 8.703 7.879 K7V 165 0
88 HD 222111 PM* 23 37 49.1263465872 +03 22 12.849885192   7.75 7.28     F3V 37 0

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