2000A&A...361..614P

Query : 2000A&A...361..614P

2000A&A...361..614P - Astronomy and Astrophysics, volume 361, 614-628 (2000/9-2)

Evolution of X-ray activity of 1-3 M☉ late-type stars in early post-main-sequence phases.

PIZZOLATO N., MAGGIO A. and SCIORTINO S.

Abstract (from CDS):

We have investigated the variation of coronal X-ray emission during early post-main-sequence phases for a sample of 120 late-type stars within 100pc, and with estimated masses in the range 1-3M☉, based on Hipparcos parallaxes and recent evolutionary models. These stars were observed with the ROSAT/PSPC, and the data processed with the Palermo-CfA pipeline, including detection and evaluation of X-ray fluxes (or upper limits) by means of a wavelet transform algorithm. We have studied the evolutionary history of X-ray luminosity and surface flux for stars in selected mass ranges, including stars with inactive A-type progenitors on the main sequence and lower mass solar-type stars. Our stellar sample suggests a trend of increasing X-ray emission level with age for stars with masses M>1.5M☉, and a decline for lower-mass stars. A similar behavior holds for the average coronal temperature, which follows a power-law correlation with the X-ray luminosity, independently of their mass and evolutionary state. We have also studied the relationship between X-ray luminosity and surface rotation rate for stars in the same mass ranges, and how this relationships departs from the Lx∝vrot2 law followed by main-sequence stars. Our results are interpreted in terms of a magnetic dynamo whose efficiency depends on the stellar evolutionary state through the mass-dependent changes of the stellar internal structure, including the properties of envelope convection and the internal rotation profile.

Abstract Copyright: ∼

Journal keyword(s): stars: coronae - stars: late-type - X-rays: stars - stars: activity - stars: evolution

Simbad objects: 110

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Number of rows : 110
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 * bet Cas dS* 00 09 10.68518 +59 08 59.2120 2.73 2.61 2.27 1.97 1.77 F2III 530 0
2 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 592 0
3 * bet02 Tuc ** 00 31 33.4223046159 -62 57 56.133914894   4.649 4.514     A3IV 100 0
4 HD 5015 PM* 00 53 04.1964421920 +61 07 26.299289856 5.43 5.34 4.80 4.32 4.02 F9V 221 1
5 * iot Tuc Er* 01 07 18.6643221624 -61 46 31.038310848   6.211 5.342     G5III 59 0
6 HD 10308 SB* 01 41 18.3757041552 +25 44 44.565663300   6.644 6.202     F7V 75 0
7 * 109 Psc PM* 01 44 55.8255136824 +20 04 59.336892804   6.984 6.279     G3Va 285 2
8 * lam02 For PM* 02 36 58.6077493776 -34 34 40.711246464 6.67 6.45 5.79     G1V 213 1
9 * eta Hor ** 02 37 24.3486279936 -52 32 35.192050404   5.569 5.293     A6V 80 0
10 * tau02 Eri PM* 02 51 02.3271116481 -21 00 14.441517124 6.28 5.67 4.77 4.07 3.60 K0III 89 0
11 * gam Per EB* 03 04 47.8201112829 +53 30 23.262605954 4.08 3.63 2.93 2.34 1.89 G9III+A2-III: 212 0
12 HD 20675 PM* 03 21 52.5329743680 +49 04 15.257802576       5.7   F6V 81 0
13 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1167 0
14 * del Eri PM* 03 43 14.9005379551 -09 45 48.210955899 5.13 4.46 3.54 2.82 2.32 K0+IV 598 0
15 HD 26015 PM* 04 07 41.9838821088 +15 09 46.041084720   6.45 6.07     F3V 165 0
16 * gam Tau ** 04 19 47.6039239005 +15 37 39.511385129 5.46 4.64 3.65 4.83   G9.5IIIabCN0.5 549 0
17 * del Tau SB* 04 22 56.0951595936 +17 32 33.049802364 5.56 4.74 3.76 5.56   G9.5IIICN0.5 525 0
18 * 70 Tau SB* 04 25 37.3225242048 +15 56 27.683560428   6.951 6.439 7.75   F7V 270 0
19 * 71 Tau dS* 04 26 20.7708204936 +15 37 05.884087620   4.758 4.480 5.96 4.15 F0V 222 0
20 * tet01 Tau SB* 04 28 34.4979222951 +15 57 44.221169423 5.510 4.780 3.840 5.48   G9IIIFe-0.5 490 0
21 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 439 0
22 * 80 Tau ** 04 30 08.59775 +15 38 16.2194   5.887 5.552 5.358 5.161 F0V 181 0
23 * rho Tau dS* 04 33 50.9178322656 +14 50 39.941657592 4.98 4.90 4.65 4.41 4.29 A8V 224 0
24 * mu. Ori SB* 06 02 22.99668 +09 38 50.1820 4.40     3.94 3.86 A1Vm+F2V 263 0
25 * 1 Gem SB* 06 04 07.21544 +23 15 48.0401 5.54 5.02 4.15 3.47 3.02 G5III 204 0
26 * alf Car * 06 23 57.10988 -52 41 44.3810 -0.49 -0.59 -0.74 -0.96 -1.13 A9II 447 1
27 HD 45588 PM* 06 27 11.3646632904 -25 51 23.392496052   6.61 6.07     F8IV 74 0
28 * ksi Gem PM* 06 45 17.3644854477 +12 53 44.141855267 3.85 3.79 3.36 2.97 2.74 F5IV-V 218 0
29 * alf Pic PM* 06 48 11.45512 -61 56 29.0008   3.46 3.23     A8VnkA6 172 0
30 * gam01 Vol PM* 07 08 42.3702708288 -70 29 49.526709864   6.046 5.623     F0/3 41 0
31 * 63 Gem SB* 07 27 44.3573297448 +21 26 43.004490108   5.62 5.24     F3V 128 0
32 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1864 0
33 * alf Cha PM* 08 18 31.5524679912 -76 55 11.006621351   4.448 4.047     F5VFe-0.8 103 0
34 * w Vel SB* 09 00 05.4097493970 -41 15 12.986426432   5.088 4.446     G8/K1III+A 52 0
35 * 26 Hya ** 09 19 46.3816547496 -11 58 29.469891720   5.703 4.770     G7III 76 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 299 0
37 * 15 LMi PM* 09 48 35.3713484808 +46 01 15.626615412 5.80 5.72 5.10 4.57 4.23 G0.5Va 311 0
38 * 19 LMi SB* 09 57 41.0544328704 +41 03 20.274786216   5.562 5.104     F6V 119 0
39 * 40 Leo dS* 10 19 44.1672125464 +19 28 15.285966538   5.24   4.5   F6IV-V 268 0
40 HD 89744 PM* 10 22 10.5618854376 +41 13 46.309698444       5.4   F7V 337 1
41 * 54 Leo A PM* 10 55 36.8013543552 +24 44 59.022329568   4.478 4.477 6.04   A1V 64 0
42 * 62 UMa SB* 11 41 34.2564094520 +31 44 45.775062146 6.08 6.16 5.75 5.37 5.09 F5 115 0
43 HD 102590 ** 11 48 38.7105955008 +14 17 03.144222456       7.18   A8V+G2V 81 0
44 * bet Vir PM* 11 50 41.7185158616 +01 45 53.001539131 4.26 4.15 3.60 3.13 2.85 F9V 929 0
45 * 9 Com PM* 12 19 29.5258397040 +28 09 24.904524312   6.83   6.1   F8Va 206 0
46 HD 107326 PM* 12 20 17.7523032840 +26 00 06.748402824   6.45 6.10     F0IV 90 0
47 HD 107398A PM* 12 20 41.3736628488 +27 03 16.403693328   7.363 6.992 7.92   F3V(n) 31 0
48 * 12 Com SB* 12 22 30.3113907816 +25 50 46.167660348 5.56 5.30 4.81 4.34 4.01 F6III+A3V 188 0
49 * 13 Com a2* 12 24 18.5489029728 +26 05 54.921403788   5.26 5.18     A3V 143 0
50 HD 108007 ** 12 24 26.80314 +25 34 56.6618   6.79 6.55     A9V(n)kF2mF0 143 0
51 * 14 Com * 12 26 24.0644226936 +27 16 05.659806648 5.40 5.22 4.95 4.70 4.55 F1IV:npS_sh 161 0
52 * 16 Com * 12 26 59.2962947904 +26 49 32.526134544   5.045 4.959   4.93 A4V 160 0
53 * 31 Com Ro* 12 51 41.9201696640 +27 32 26.565016812 5.81 5.61 4.94 4.39 4.04 G0IIIp 431 1
54 * eps Vir PM* 13 02 10.5970152536 +10 57 32.935398266 4.45 3.71 2.79 2.16 1.71 G8III-IIIb 553 0
55 * 70 Vir PM* 13 28 25.8085908881 +13 46 43.638308807 5.930 5.680 4.970 4.37 3.98 G4Va 715 1
56 * 24 CVn PM* 13 34 27.2599342022 +49 00 57.499096964   4.82 4.70     A4V 103 0
57 * i Cen SB* 13 45 41.2439386102 -33 02 37.381099823 4.61 4.61 4.23 3.90 3.69 F2V 164 0
58 * eta Boo SB* 13 54 41.07892 +18 23 51.7946 3.440 3.250 2.680 2.24 1.95 G0IV 704 0
59 * 14 Boo ** 14 14 05.1793499304 +12 57 33.996726108   6.08   5.2   F8V 174 0
60 HD 124553 PM* 14 14 21.3084172849 -05 56 51.792300385   6.96 6.36     F8V 87 0
61 * iot Vir PM* 14 16 00.8682760805 -06 00 01.969483331 4.64 4.60 4.08     F7III 357 0
62 * lam Vir SB* 14 19 06.5926692303 -13 22 15.928662088 4.750 4.660 4.520   4.43 A1V 148 0
63 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1280 1
64 HD 129422 PM* 14 45 17.3365585320 -62 52 32.337803676   5.644 5.360     A9III/IV 53 0
65 * m Hya ** 14 46 00.07998 -25 26 35.4355           F0VSr+G1V 70 0
66 * 39 Boo ** 14 49 41.29265 +48 43 14.9077   8.41 8.30 6.41   F8V+F7V 59 0
67 * bet Boo Er* 15 01 56.7623044453 +40 23 26.046853660 5.21 4.47 3.52 2.85 2.37 G8IIIaFe-0.5 252 0
68 * i Boo EB* 15 03 47.29565 +47 39 14.6228           G0Vn 544 0
69 * zet Lup PM* 15 12 17.0955222617 -52 05 57.295332603 4.99 4.33 3.41     G8III 108 0
70 * 5 Ser Ro* 15 19 18.7974409923 +01 45 55.466382064   5.60   4.8   F8IV 340 0
71 * nu.01 Lup PM* 15 22 08.2706803440 -47 55 40.053168840   5.50 5.00     F6III-IV 108 0
72 HD 138852 PM* 15 30 55.7637907944 +64 12 31.295104524   6.721 5.738     K0III-IV 60 0
73 * psi01 Lup * 15 39 45.9793075992 -34 24 42.914876364   5.641 4.661     G8/K0III 40 0
74 * eta UMi PM* 16 17 30.2702509656 +75 45 19.235082204   5.32   4.7   F5V 84 0
75 * eps Oph PM* 16 18 19.2902245358 -04 41 33.047349888 4.95 4.21 3.23 2.54 2.05 G9.5IIIbFe-0.5 235 0
76 * eta Dra PM* 16 23 59.4863284800 +61 30 51.155139060 4.35 3.65 2.74 2.12 1.66 G8-IIIab 298 0
77 * bet Her SB* 16 30 13.2003216885 +21 29 22.598684027 4.39 3.70 2.77 2.13 1.65 G7IIIaFe-0.5 319 0
78 * ome Oph a2* 16 32 08.2003815598 -21 27 59.052127058 4.69 4.56 4.45 4.32 4.30 ApSrEuCr 156 0
79 * zet Her SB* 16 41 17.16104 +31 36 09.7873 3.640 3.430 2.800 2.31 1.99 G0IV 545 0
80 * eta Her PM* 16 42 53.7649454572 +38 55 20.117710727 5.03 4.42 3.50 2.83 2.35 G7IIIFe-1 283 0
81 HD 154948 PM* 17 10 42.3192274392 -44 33 27.711930024 6.52 5.94 5.08     G8/K0III+G 45 0
82 * eta Sco PM* 17 12 09.1940948534 -43 14 21.082311424 3.83 3.74 3.33 2.97 2.77 F5IV 151 0
83 * 47 Oph SB* 17 26 37.8815658414 -05 05 11.754469183 4.90 4.93 4.54 4.16 3.95 F3V 157 0
84 * ome Dra SB* 17 36 57.0943076755 +68 45 28.681533966   5.23   4.5   F4V 168 0
85 * mu. Ara PM* 17 44 08.7031414872 -51 50 02.591603160   5.85 5.15     G3IV-V 531 2
86 * mu.01 Her ** 17 46 27.5472960785 +27 43 14.560978925 4.56 4.17 3.42 2.89 2.51 G5IV 691 0
87 * ksi Her LP* 17 57 45.8856741278 +29 14 52.366005079 5.34 4.64 3.70 3.01 2.55 G8.5III 238 0
88 * 40 Dra SB* 18 00 03.5284407912 +80 00 03.048202980   6.447 5.939     F7 79 0
89 * 41 Dra SB* 18 00 09.1817075904 +80 00 14.807356056   6.132 5.642     K2Vv 86 0
90 * 71 Oph * 18 07 18.3593981592 +08 44 01.922061912   5.592 4.640     G8III 173 0
91 * eta Ser PM* 18 21 18.6004923875 -02 53 55.780691633 4.84 4.19 3.25 2.55 2.05 K0III-IV 377 0
92 HD 171391 PM* 18 35 02.3926287840 -10 58 37.942910580   6.027 5.119     G8II/III 133 0
93 HD 172088 ** 18 38 23.7978014894 -03 11 37.135217156   7.035 6.482     F8V 110 0
94 * eps01 Lyr A PM* 18 44 20.3437462368 +39 40 12.465005484   5.111 4.991     A3V 62 0
95 HD 175225 PM* 18 51 34.9201379040 +52 58 30.246268944   6.35   5.0   G9IVa 116 1
96 * eps CrA EB* 18 58 43.3827144528 -37 06 26.380732536   5.19 4.83     F4VFe-0.8+ 211 0
97 * f Aql SB* 19 20 32.9062014840 -05 24 56.764910088   5.927 4.990     G8/K0IV 124 0
98 HD 199870 SB* 20 58 19.4663810952 +44 28 18.140900268   6.528 5.547     K0III:Fe-0.5 103 0
99 HD 200011 SB* 21 02 12.7230325296 -43 00 07.721990892 7.49 7.32 6.64     F8/G0V 48 0
100 * zet Cyg SB* 21 12 56.1859894833 +30 13 36.835250232 4.96 4.20 3.21 2.52 2.04 G8+III-IIIaBa0.5 341 0
101 * alf Equ SB* 21 15 49.4371672506 +05 14 52.411028661   4.446 3.933     G6IV+B9.5V 150 0
102 * alf Cep PM* 21 18 34.77233 +62 35 08.0681 2.770 2.680 2.460 2.22 2.11 A8Vn 359 0
103 * rho Cyg PM* 21 33 58.8530450102 +45 35 30.620055459 5.47 4.91 4.02 3.31 2.81 G8IIIFe-0.5 198 0
104 * 41 Cap PM* 21 42 00.6970857096 -23 15 46.285843716   6.227 5.240     K0III 31 0
105 * tet Aqr PM* 22 16 50.0366846016 -07 46 59.839473115 5.95 5.15 4.16 3.46 2.98 G9II 141 0
106 * eta Peg SB* 22 43 00.1288449480 +30 13 16.372969392 4.38 3.81 2.95 2.31 1.83 G8II+F0V 199 0
107 HD 215664 dS* 22 46 10.2221219664 +44 32 45.797281332 6.250 6.180 5.840     F0III-IV 57 0
108 * eps Gru SB* 22 48 33.2980615128 -51 19 00.713323272   3.556 3.466     A2IVn 129 0
109 * mu. Peg PM* 22 50 00.1930748087 +24 36 05.692620534 5.10 4.42 3.48 2.80 2.33 G8+III 295 0
110 * ups Peg PM* 23 25 22.7828725585 +23 24 14.762916815 5.15 5.01 4.40 3.86 3.54 F8III 255 0

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