2015A&A...581A..28P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:55:30

2015A&A...581A..28P - Astronomy and Astrophysics, volume 581A, 28-28 (2015/9-1)

A survey of stellar X-ray flares from the XMM-Newton serendipitous source catalogue: HIPPARCOS-Tycho cool stars.

PYE J.P., ROSEN S., FYFE D. and SCHROEDER A.C.

Abstract (from CDS):

The X-ray emission from flares on cool (i.e. spectral-type F-M) stars is indicative of very energetic, transient phenomena, associated with energy release via magnetic reconnection. We present a uniform, large-scale survey of X-ray flare emission. The XMM-Newton Serendipitous Source Catalogue and its associated data products provide an excellent basis for a comprehensive and sensitive survey of stellar flares - both from targeted active stars and from those observed serendipitously in the half-degree diameter field-of-view of each observation. The 2XMM Catalogue and the associated time-series (``light-curve'') data products have been used as the basis for a survey of X-ray flares from cool stars in the Hipparcos-Tycho-2 catalogue. In addition, we have generated and analysed spectrally-resolved (i.e. hardness-ratio), X-ray light-curves. Where available, we have compared XMM OM UV/optical data with the X-ray light-curves. Our sample contains ∼130 flares with well-observed profiles; they originate from ∼70 stars. The flares range in duration from ∼103 to ∼104s, have peak X-ray fluxes from ∼10–13 to ∼10–11erg/cm2/s, peak X-ray luminosities from ∼1029 to ∼1032erg/s, and X-ray energy output from ∼1032 to ∼1035erg. Most of the ∼30 serendipitously-observed stars have little previously reported information. The hardness-ratio plots clearly illustrate the spectral (and hence inferred temperature) variations characteristic of many flares, and provide an easily accessible overview of the data. We present flare frequency distributions from both target and serendipitous observations. The latter provide an unbiased (with respect to stellar activity) study of flare energetics; in addition, they allow us to predict numbers of stellar flares that may be detected in future X-ray wide-field surveys. The serendipitous sample demonstrates the need for care when calculating flaring rates, especially when normalising the number of flares to a total exposure time, where it is important to consider both the stars seen to flare and those from which variability was not detected (i.e. measured as non-variable), since in our survey, the latter outnumber the former by more than a factor ten. The serendipitous variable and ``non-variable'' stars appear very similar in terms of the distributions of general properties such as quiescent X-ray luminosity; from the available data, it is unclear whether the distinction by flaring is due to an additional, intrinsic property such as intra-system interactions in a close binary system, or is simply the result of limited observations and detection thresholds on a random flaring process, with no real difference between the two samples, or may be a combination of these effects. However, the number of detected flares compared with the number of stars not seen to vary is broadly consistent with estimates based on Poisson statistics.

Abstract Copyright:

Journal keyword(s): X-rays: stars - stars: flare - stars: activity - stars: coronae - surveys - catalogs

VizieR on-line data: <Available at CDS (J/A+A/581/A28): tablec1.dat tablec1.fit refs.dat tablec2.dat tablec2.fit>

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 - 2020
#notes
1 V* UY Scl RR* 00 14 45.7519693501 -39 14 35.567831721   12.44 11.53     ~ 20 0
2 HD 1165 * 00 16 52.5165298292 +81 39 49.084879033   9.54 8.66     K0 11 0
3 [RCM2004] Tycho B * 00 25 19.9860213942 +64 08 17.185415888   16.4 15.4     A8/A9V 10 0
4 HD 8191 ** 01 18 37.959 -73 25 26.87           F8/G2IV/V 28 2
5 * 47 Cas PM* 02 05 07.4242273 +77 16 52.824198   5.590 5.268     F0V 104 1
6 HD 14716 * 02 16 03.5093894871 -73 50 43.112740651   10.03 9.54     F5V 5 0
7 V* CC Eri BY* 02 34 22.5662436236 -43 47 46.871752741 11.305 10.201 8.865 7.926 6.992 K7V 249 0
8 CD-53 544 Ro* 02 41 46.8356379379 -52 59 52.395448380   11.49 10.281 9.992 8.305 K6Ve 39 0
9 V* RZ Cas Al* 02 48 55.5096536172 +69 38 03.441544807   6.40 6.26     A3V 438 0
10 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 823 0
11 * eps Eri BY* 03 32 55.8449634 -09 27 29.731165 5.19 4.61 3.73 3.00 2.54 K2V 1697 1
12 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1124 0
13 TYC 64-1340-1 * 03 38 15.0401397754 +00 29 26.134115568   12.19 11.82     ~ 2 0
14 V* V471 Tau Al* 03 50 24.9664598642 +17 14 47.433240686   10.258 9.373   8.393 K2V+DA 615 0
15 TYC 5315-102-1 PM* 04 07 21.8082935484 -12 10 03.318080185   12.18 11.61     ~ 2 0
16 V* V410 Tau Or* 04 18 31.1083261392 +28 27 16.155411536   12.13 10.75 8.45 9.408 K3Ve 424 0
17 HD 283572 Or* 04 21 58.8482823933 +28 18 06.511915195   9.80 9.03 9.14   G5IVe 267 0
18 V* T Tau Or* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1249 2
19 V* V895 Tau BY* 04 24 12.4682935138 +14 45 29.532981115   8.217 7.583 8.43   G0V(e) 206 0
20 * tet02 Tau dS* 04 28 39.7445471109 +15 52 15.122606898 3.690 3.600 3.410 5.43   A7III 416 0
21 HD 285845 Or* 04 31 25.1252400430 +18 16 16.728688205   11.06 10.31     G5 32 0
22 HD 28634 SB* 04 31 37.1109731928 +17 42 34.917445957   10.515 9.517 9.43   K2V 73 0
23 V* V807 Tau Or* 04 33 06.6303920517 +24 09 55.044051684   12.10 11.21 11.18   K7 130 2
24 HD 283810 Ro* 04 40 09.2276971742 +25 35 32.608722133 13.00 11.744 10.626     K5 25 0
25 HD 31305 * 04 55 48.2337162586 +30 20 16.467049305   7.70 7.60     A0 34 0
26 V* SU Aur Or* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 532 0
27 HD 268974 bL* 05 05 26.9803019649 -67 43 13.520074412   12.17 11.30     K2 8 0
28 HD 36705 TT* 05 28 44.8916324761 -65 26 55.289846904 8.259 7.856 6.999 6.496 5.993 K0V 931 0
29 TYC 4774-868-1 * 05 35 03.4105163067 -05 05 40.322022603   10.94 10.56     ~ 11 0
30 HD 37040 * 05 35 31.0756214113 -04 21 50.555454981 5.50 6.24 6.38     B2V 90 1
31 NAME OMC-2/3 reg 05 35 33.0 -05 00 32           ~ 55 0
32 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 800 0
33 V* SV Cam Al* 06 41 19.0820839974 +82 16 02.435978987       9.0   G2IV-V 346 0
34 HD 51141 ** 07 25 25.2399742249 +85 44 19.494205614       12.0   F8 22 0
35 HD 59581 PM* 07 35 09.1614732569 +65 40 25.075445865   8.84 8.36     G0 22 0
36 V* YZ CMi Er* 07 44 40.1726285952 +03 33 08.877830321 13.761 12.831 11.225 9.958 8.263 M4.0Ve 782 0
37 TYC 3797-1900-1 PM* 08 32 28.5754152975 +52 45 33.045969365   12.39 11.35     ~ 5 0
38 * pi.01 UMa BY* 08 39 11.7043265307 +65 01 15.268273190 6.33 6.26 5.64 5.12 4.79 G0.5V 520 0
39 HD 73709 SB* 08 40 20.7480896063 +19 41 12.244320818   7.87 7.68     kA2hA5mF0(III-IV)(Cr) 95 0
40 CD-45 4602 * 08 50 02.4749327494 -45 41 41.691924613   10.26 9.48     G5 13 0
41 V* XY UMa RS* 09 09 55.9355245408 +54 29 17.725267002       9.620   G5 238 0
42 V* LQ Hya BY* 09 32 25.5684079124 -11 11 04.687410738 9.316 8.761 7.891 7.288 6.815 K1Vp 401 0
43 HD 83698 ** 09 41 21.93280 +38 57 00.7405 8.020 7.620 6.890     G5 40 0
44 TYC 4383-523-1 * 09 55 36.1437821811 +69 54 48.697727623   12.18 11.26     ~ 4 0
45 BD+20 2465 Er* 10 19 36.2808024653 +19 52 12.014037746   10.82 9.52 9.19   M4Vae 1145 0
46 HD 237944 Al* 10 53 01.05344 +57 42 07.9822   10.11 9.41 9.26   G5 26 0
47 Hen 3-545 Or* 10 59 06.9712894449 -77 01 40.309036535   12.91 11.136   9.596 K4Ve 188 0
48 HD 95735 Fl* 11 03 20.19400 +35 58 11.5682 10.030 8.960 7.520 5.99 4.79 M2+V 623 1
49 HD 95735b Pl 11 03 20.19400 +35 58 11.5682           ~ 15 1
50 Ass Cha T 2-21 TT* 11 06 15.3485848381 -77 21 56.737939872   12.58 11.01   9.35 G5Ve 122 0
51 HD 104021 * 11 58 38.9317460548 -52 46 07.348097749   7.70 7.49     A7V 20 0
52 HD 108984 PM* 12 31 18.2965163353 +20 13 04.125902027   8.76   7.4   K0V 27 0
53 V* IM Vir Al* 12 49 38.6983641947 -06 04 44.864909873   10.34 9.69   8.834 G5/6V 65 0
54 TYC 6113-581-1 * 13 14 11.0202751211 -16 20 24.107306599   12.31 11.81     ~ 2 0
55 V* FK Com Ro* 13 30 46.7993742986 +24 13 57.786184235   9.04 8.245   7.204 G4III 346 1
56 V* DG CVn Er* 13 31 46.6246175093 +29 16 36.681048898   12.90 12.02 10.77 9.15 M4Ve 96 0
57 2MASS J13362690-3426365 * 13 36 26.9123272420 -34 26 36.457295974           K2 5 0
58 * tau Boo Ro* 13 47 15.74340 +17 27 24.8552 5.02 4.98 4.49 4.09 3.85 F7IV-V 879 1
59 HD 122473 * 14 02 19.6354262405 -11 04 58.348737881   9.47 8.48 10.50   K0III 9 0
60 TYC 3852-1069-1 * 14 04 21.6696 +54 19 22.389   12.62 12.44 11.2   ~ 11 0
61 HD 127244 PM* 14 29 01.3110831733 +42 30 50.302046816   9.69 9.01     K0 8 0
62 V* EK Dra BY* 14 39 00.2109485496 +64 17 29.977371998   8.243 7.604     G1.5V 377 0
63 * ksi Boo A PM* 14 51 23.3876853015 +19 06 01.641924918   5.40 4.675     G7Ve 498 0
64 * i Boo EB* 15 03 47.29565 +47 39 14.6228   5.41 4.76     G0Vn 523 0
65 V* UZ Lib SB* 15 32 23.2091329303 -08 32 00.933695382   10.12 9.115   7.904 K0III 110 1
66 * sig CrB RS* 16 14 40.85557 +33 51 30.9497           F6V+G0V 476 0
67 CD-53 6825 * 16 40 05.1383822442 -53 45 30.021285735   10.97 9.67     ~ 2 0
68 * alf TrA * 16 48 39.89508 -69 01 39.7626   3.36 1.92     K2III_Ba1 228 0
69 TYC 9275-1654-1 * 16 50 50.9989248891 -68 59 16.533191133   12.55 11.61     ~ 1 0
70 V* BN Sgr Al* 17 47 05.3857989148 -28 08 59.482990265   10.02 9.42     F3V 35 0
71 * 70 Oph Ro* 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 607 0
72 HD 166191 * 18 10 30.3389659406 -23 34 00.266958478   8.86 8.38     F3/5V 23 0
73 TYC 455-921-1 * 18 40 30.3107 +05 13 16.864   13.15 11.65     ~ 2 0
74 V* V709 CrA Or* 19 01 34.8590599569 -37 00 56.581106047   12.70 11.03     K1IV 55 0
75 TYC 1082-2107-1 * 20 19 00.1895443353 +11 35 07.752693497   12.54 11.47     G3V 3 0
76 V* VW Cep EB* 20 37 21.6248469581 +75 36 01.889162699   8.13   7.0   G8V+K0V 523 0
77 V* AT Mic Er* 20 41 51.15925 -32 26 06.8283 12.753 11.909 10.343 9.098 7.383 M4.5Ve+M4.5Ve 325 0
78 V* AU Mic BY* 20 45 09.5323695486 -31 20 27.241710746   10.05 8.627 9.078 6.593 M1VeBa1 893 0
79 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 945 0
80 * 61 Cyg B Fl* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 667 1
81 BD+69 1172 * 21 27 07.8455704210 +70 22 12.205396009   9.51 8.98     F8 4 0
82 V* EV Lac Er* 22 46 49.7311740821 +44 20 02.372223230   11.85 10.26 9.89   M4.0V 800 2
83 V* HK Aqr BY* 23 08 19.5510988144 -15 24 35.768241707 13.4 12.282 10.872 9.964 9.019 M0Ve 183 0
84 TYC 4609-273-1 * 23 16 30.7146087332 +79 05 36.283868540   11.86 11.01     ~ 2 0
85 HD 220140 RS* 23 19 26.6384866318 +79 00 12.671002116   8.43 7.54 7.17 6.76 G9V 127 1
86 BD+19 5116 ** 23 31 52.17898 +19 56 14.1505 12.737 11.749 10.165 8.982 7.446 M4+M5 419 0
87 * lam And RS* 23 37 33.8426114 +46 27 29.337984 5.54 4.84 3.82 3.04 2.47 G8IVk 640 0
88 NAME Galactic Ridge ? ~ ~           ~ 427 1

    Equat.    Gal    SGal    Ecl

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2020.07.03-22:55:30

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