2003AJ....126.1996M


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET07:05:03

2003AJ....126.1996M - Astron. J., 126, 1996-2008 (2003/October-0)

The 100 brightest X-ray stars within 50 parsecs of the sun.

MAKAROV V.V.

Abstract (from CDS):

Based on the Hipparcos and Tycho-2 astrometric catalogs and the ROSAT surveys, a sample of 100 stars most luminous in X-rays within or around a distance of 50 pc is culled. The smallest X-ray luminosity in the sample, in units of 1029 ergs/s, is LX=9.8; the strongest source in the solar neighborhood is II Peg, a RS CVn star, at LX=175.8. With respect to the origin of X-ray emission, the sample is divided into partly overlapping classes of pre-main-sequence, post-T Tauri, and very young ZAMS objects (type XY), RS CVn-type binary stars (type RS), other active short-period binaries, including binary BY Dra-type objects (type XO), apparently single or long-period binary active evolved stars (type XG), contact binaries of WU UMa kind (type WU), apparently single or long-period binary variable stars of BY Dra kind (type BY), and objects of unknown nature (type X?). Chromospherically active, short-period binaries (RS and XO) make up 40% of the brightest X-ray emitters, followed by young stars (XY) at 30% and unknown sources (X?) at 15%. The fraction of spectroscopically single evolved X-ray emitters of spectral classes IV and III is quite large (10%). The sources identified as RS CVn-type stars (RS, 23 objects) are considerably stronger in X-ray than the XY-objects and the other active binaries (XO and WU, 20 objects). Seven objects have LX>100, all RS except one XY, viz., BO Mic. Only five (22%) RS objects have LX<25, while only three (10%) XY stars have LX>25. Formally, the limit of LX=25 could serve as a statistical criterion to differentiate RS and XY stars. However, the other short-period binaries (including eclipsing stars of Algol and β Lyr type) have a distribution of LXvery similar to the XY objects. The contact binaries (WU) appear to be much weaker in X-rays than their detached counterparts of RS type, but the sample of the former is too small (three objects) to reach a firm conclusion. Sources matched with giants (either single or in binaries) are found to be significantly harder, with only 7% of hardness ratios below 0, than subgiants (66% of HR1<0) and dwarfs (59% of HR1<0). Almost all objects in the sample are binary or multiple stars; the fraction of components (FC), defined as the total number of components in all binary and multiple systems divided by the sum of the total number of components and single stars, is at least 0.90. The FC for the XY objects reaches 0.81, and for the unknown type 0.89. About 70% of RS objects have also visual or astrometric companions, which makes them hierarchical multiple systems. The RS objects (mostly old, evolved stars) and the XY stars have quite different kinematics. While the RS objects move at considerable velocities in apparently random directions with respect to the local standard of rest, the young stars have smaller and orderly velocities and tend to comprise expanding mini-associations such as the β Pic and the Tucana groups. The majority of the young X-ray active stars belong to the Pleiades stream with the mean heliocentric velocity (U,V,W)=(-9.6,-21.8,-7.7) km/s.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: General - Stars: Activity - Stars: Kinematics - Stars: Statistics - X-Rays

VizieR on-line data: <Available at CDS (J/AJ/126/1996): table1.dat table4.dat>

Simbad objects: 112

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Number of rows : 112

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Tuc Moving Group MGr 00 00 -64.0           ~ 66 0
2 V* LN Peg RS* 00 12 30.3019837939 +14 33 48.861061306   9.40   8.0   G8V+K5V 93 0
3 HD 2726 PM* 00 30 26.0867926984 -48 12 53.199084373   6.005 5.664     F2V 52 0
4 HD 3221 Ro* 00 34 51.2019905484 -61 54 58.129778039   10.83 9.604   8.238 K4Ve 66 0
5 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 496 0
6 V* BW Phe BY* 00 56 55.4578740900 -51 52 31.842227982   10.61 9.053   7.882 K3Ve 31 0
7 HD 8357 XB* 01 22 56.7569725665 +07 25 09.324761789 8.530 8.160   6.8   G5 155 0
8 HD 8558 Ro* 01 23 21.2548999023 -57 28 50.689650839   9.21 8.543   7.773 G7V 65 0
9 V* AE Phe WU* 01 32 32.9321973079 -49 31 41.290852285   8.75 8.15     G4V 112 0
10 HD 9770 ** 01 35 01.0078925286 -29 54 37.342172838 8.605 8.03 7.096 6.551 6.035 K1V 142 0
11 HD 12759 ** 02 03 55.25101 -45 24 46.4628   9.04 8.73 7.91   G5V 52 0
12 * 47 Cas PM* 02 05 07.4242273 +77 16 52.824198   5.590 5.268     F0V 104 1
13 HD 13183 PM* 02 07 18.0602017151 -53 11 56.532126551   9.34 8.65   7.87 G7V 66 0
14 NAME Horologium Association As* 02 10.0 -54 30           ~ 49 0
15 V* UX For RS* 02 43 25.5661088351 -37 55 42.027954989   8.77 8.055   7.165 G5/8V+(G) 77 0
16 V* VY Ari RS* 02 48 43.7283572894 +31 06 54.592580835   7.72   6.4   G9 205 0
17 HD 18134 BY* 02 51 52.9736837241 -61 37 04.604352176   9.71 8.83   7.815 K1V 31 0
18 * bet Per Al* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1139 2
19 HD 20121 ** 03 12 25.74558 -44 25 10.7932   6.37 5.93     A8V+F3V 87 0
20 HD 20385 ** 03 16 40.6680551666 -03 31 48.926213542   7.99 7.49     F6V 40 0
21 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 659 0
22 HD 21845 BY* 03 33 13.4903859633 +46 15 26.544579583   8.963 8.250 7.8 7.34 K2 75 0
23 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1119 0
24 HD 22403 BY* 03 37 11.0382533361 +25 59 27.954584097       6.9   G4 110 0
25 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2924 0
26 HD 23524 ** 03 48 23.00324 +52 02 16.2701   9.66 9.03 8.96   G5V 73 0
27 V* V471 Tau Al* 03 50 24.9664598642 +17 14 47.433240686   10.258 9.373   8.393 K2V+DA 605 0
28 V* AG Dor RS* 04 07 29.1816721659 -52 34 17.293643629   9.50 8.595   7.526 K2IV-Vk 79 0
29 * 71 Tau dS* 04 26 20.7730189928 +15 37 05.788526607   4.758 4.480 5.96 4.15 F0V 208 0
30 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2604 0
31 V* V1198 Ori RS* 04 58 16.9768687912 +00 27 13.975499258   7.90   6.8   G5IVe 69 1
32 * ome Aur ** 04 59 15.40974 +37 53 24.8816   5.008 4.989     A1V 118 1
33 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1135 0
34 V* AS Col RS* 05 20 38.0483050509 -39 45 17.794216843   7.89 7.38   6.81 F6V 62 1
35 V* AF Lep RS* 05 27 04.7631691589 -11 54 03.466187467   6.832 6.295     F8V(n)k: 203 0
36 HD 36705 TT* 05 28 44.8916324761 -65 26 55.289846904 8.259 7.856 6.999 6.496 5.993 K0V 920 0
37 V* XZ Pic BY* 05 45 13.4016165501 -59 55 25.618635977   10.10 9.218   8.261 K0V(e) 30 0
38 HD 41824 RS* 06 04 46.68146 -48 27 29.8706       7.57   G5V 90 0
39 V* AO Men BY* 06 18 28.2084971476 -72 02 41.446399943   11.06 9.809 9.299 8.456 K4Ve 112 0
40 1RXS J061908.2-032625 X 06 19 08.198 -03 26 25.51           ~ 2 0
41 HD 48189 BY* 06 38 00.3760790738 -61 32 00.101786310   6.747 6.182   5.46 G1/2V 124 0
42 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 442 0
43 BD-15 2429 Al* 08 25 51.6054049425 -16 22 47.397127759   11.45 10.29 9.73 9.36 K7V+M0/2:V 33 0
44 IC 2391 OpC 08 40 32 -53 02.0           ~ 707 0
45 * eps Hya BY* 08 46 46.51223 +06 25 07.6855 4.43 4.06 3.38 2.78 2.39 G1III+A8V 246 0
46 HD 78644 PM* 09 08 17.1488035726 -37 06 53.530598559   8.86 8.22     G3V 35 0
47 V* BF Lyn BY* 09 22 25.9436108516 +40 12 03.806653234   8.62   7.1   K2.5Vke 115 0
48 HD 81734 PM* 09 25 36.3182545624 -53 15 06.594935975   7.46 6.97     F7V 23 0
49 * d UMa RS* 09 34 28.8617537809 +69 49 49.226466640 5.67 5.34 4.57 3.91 3.50 G5III-IV 278 0
50 V* W UMa WU* 09 43 45.4704899627 +55 57 09.066718574   8.54 7.75     G2Vn 628 1
51 V* DH Leo RS* 10 00 01.7102607868 +24 33 10.098116028   9.47 7.982 7.3 6.898 K0Vk 152 0
52 * mu. Vel ** 10 46 46.17877 -49 25 12.9244 4.16 3.59 2.69 2.01 1.52 G6III 171 0
53 NAME TW Hya Association As* 11 01.9 -34 42           ~ 798 0
54 HD 98800 RS* 11 22 05.28975 -24 46 39.7571   10.27 8.912 9.257 7.386 K5V(e) 326 0
55 HD 102077 BY* 11 44 38.4351785407 -49 25 02.278015710   10.04 8.917   7.831 K1V 89 0
56 V* QY Hya bL* 12 09 20.81505 -27 58 55.9259   11.20 9.089   8.045 K2V(e) 31 0
57 HD 106855 BY* 12 17 23.97512 -21 03 30.2268   10.40 9.283 9.60 8.079 K1V 25 1
58 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 373 2
59 HD 114630 SB* 13 12 55.6931542150 -59 48 59.753037513 6.90 6.79 6.22     G0V 67 0
60 BD+23 2581 ** 13 32 41.6858519142 +22 30 06.809284189   10.65 9.622 9.0 8.381 KV:e 29 0
61 V* BH CVn RS* 13 34 47.8087874928 +37 10 56.694070527 5.43 5.38 4.98 4.57 4.27 A6m 316 0
62 HD 123034 SB* 14 05 03.7232393415 +10 00 48.945061657   9.63 8.677 8.2 7.735 G5 28 0
63 * phi Vir PM* 14 28 12.1387305861 -02 13 40.648944384   5.522 4.840     G2IV 171 0
64 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 531 0
65 V* EK Dra BY* 14 39 00.2109485496 +64 17 29.977371998   8.243 7.604     G1.5V 372 0
66 HD 135363 ** 15 07 56.2503196449 +76 12 02.714809400       8.1   G5V+M2V-M4V 62 0
67 1RXS J153859.3-574225 X 15 38 59.302 -57 42 25.49           ~ 2 0
68 V* KW Lup BY* 15 45 47.6004000229 -30 20 55.746429833   10.34 9.37   7.956 K2V 59 0
69 * del CrB RS* 15 49 35.6468905541 +26 04 06.203245322 5.80 5.43 4.63 4.00 3.58 G5III-IVFe-1 192 0
70 1RXS J160330.5-574637 X 16 03 30.50 -57 46 37.0           ~ 2 0
71 HD 143937 Al* 16 04 02.8340242011 -21 55 40.148317799   9.54 8.73   7.520 K0IV(e) 39 0
72 * sig CrB RS* 16 14 40.85557 +33 51 30.9497           F6V+G0V 474 0
73 HD 147633 ** 16 25 17.58322 -49 08 52.3567   9.44 8.92 8.27   G2V 56 0
74 * gam Aps PM* 16 33 27.0837870 -78 53 49.737204   4.783 3.854     G8III 83 0
75 HD 155555 RS* 17 17 25.5047544575 -66 57 03.732827572 7.795 7.499 6.723   6.39 K1Vp 249 2
76 HD 155875 ** 17 20 12.67828 -70 02 43.3217   7.13 6.52     G0IV 51 0
77 V* V2383 Oph BY* 17 40 43.7819349337 -07 46 12.974542936   11.5 10.30   8.779 K7V 13 0
78 V* V835 Her RS* 17 55 24.6812481627 +36 11 19.929393032   8.81 7.92     G5 64 0
79 * ksi Her LP* 17 57 45.8857114 +29 14 52.367509 5.34 4.64 3.70 3.01 2.55 G8.5III 220 0
80 HD 165590 EB* 18 05 49.6819035061 +21 26 45.389410339   7.716 7.096     G0V+G5V 219 0
81 1RXS J180749.6+260558 X 18 07 49.60 +26 05 58.0           ~ 2 0
82 V* V815 Her RS* 18 08 16.0466708534 +29 41 28.298657106   8.40 7.70     G5 131 0
83 V* V889 Her BY* 18 34 20.1030244573 +18 41 24.234582456   8.00 7.449   6.720 G2V 116 0
84 V* PZ Tel BY* 18 53 05.8733807460 -50 10 49.901380086   9.22 8.342   7.464 G9IV 240 0
85 * rho Tel PM* 19 06 19.9556991283 -52 20 27.288013018   5.700 5.174     F6V 66 0
86 V* V511 Lyr RS* 19 06 21.3086987512 +27 42 47.821948225       8.4   K0 26 0
87 V* V478 Lyr RS* 19 07 32.3867188674 +30 15 16.176365783   8.54   7.3   G6V 114 0
88 HD 180445 Ro* 19 18 12.6423922330 -38 23 04.446085398   9.27 8.415   7.444 G8V(e) 33 0
89 V* VW Cep WU* 20 37 21.6248469581 +75 36 01.889162699   8.13   7.0   G8V+K0V 519 0
90 V* BO Mic BY* 20 47 44.9892114361 -36 35 40.819135413   10.39 9.337   8.216 K3V(e) 162 0
91 HD 199143 ** 20 55 47.67398 -17 06 51.0440   7.84 7.32     F8V 105 0
92 HD 200391 Ae* 21 02 25.9068825509 +27 48 26.439773330   7.93 7.374   6.624 G0V+G5V 334 0
93 * alf Oct bL* 21 04 43.0634661812 -77 01 25.573493058   5.64 5.15     F6(m)pec 69 0
94 V* BR Ind Al* 21 11 22.78579 -52 20 21.2865   7.73 7.068   6.299 F8V 40 1
95 HD 202917 Ro* 21 20 49.9575453387 -53 02 03.157635940   9.32 8.67   7.882 G7V 132 0
96 V* BS Ind bL* 21 20 59.8211404023 -52 28 40.186986149   10.70 8.900   7.893 G9V 63 0
97 * rho Cyg PM* 21 33 58.8529848 +45 35 30.617851 5.47 4.91 4.02 3.31 2.81 G8IIIFe-0.5 182 0
98 HD 209942 PM* 21 58 12.7853754748 +82 52 10.782472154   7.43 6.98     F6IV-V 68 1
99 V* V376 Cep RS* 21 58 19.7307005307 +82 52 15.839265442   8.06 7.43     F5 62 0
100 V* AR Lac RS* 22 08 40.8180372773 +45 44 32.104045703 7.09 6.83 6.11     K0IVe+G5IV 693 0
101 V* CS Gru BY* 22 15 35.2283575167 -39 00 50.697631374   10.14 9.335   8.348 K0V 21 0
102 V* KZ And BY* 23 09 57.3641653876 +47 57 30.042914842   8.81 7.93     K2-Ve 118 0
103 HD 220140 RS* 23 19 26.6384866318 +79 00 12.671002116   8.43 7.54 7.17 6.76 G9V 125 1
104 * lam And RS* 23 37 33.8426114 +46 27 29.337984 5.54 4.84 3.82 3.04 2.47 G8IVk 639 0
105 HD 222259 RS* 23 39 39.48044 -69 11 44.7051   9.19 8.226   7.352 G6V+K3Ve 73 0
106 * ome02 Aqr PM* 23 42 43.3447268 -14 32 41.652314   4.448 4.484     B9V 131 0
107 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 675 0
108 HD 224168 PM* 23 55 41.5324628996 +25 08 39.193788903       8.5   G5 20 0
109 NAME Pleiades Moving Group MGr ~ ~           ~ 231 1
110 1RXS J230957.6+475756 X ~ ~           ~ 1 0
111 NAME Hyades Moving Group MGr ~ ~           ~ 232 1
112 NAME Castor Moving Group As* ~ ~           ~ 114 1

    Equat.    Gal    SGal    Ecl

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2020.01.21-07:05:03

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