2007A&A...469..713M


Query : 2007A&A...469..713M

2007A&A...469..713M - Astronomy and Astrophysics, volume 469, 713-719 (2007/7-2)

Results from a spectroscopic survey in the CoRoT fields. I. Search for chromospherically active stars.

MEDHI B.J., MESSINA S., PARIHAR P.S., PAGANO I., MUNEER S. and DUORAH K.

Abstract (from CDS):

In this paper we report the results of the spectroscopic survey we carried out to detect chromospheric activity of late-type stars in the fields of view of the CoRoT space mission.We give an accurate MK classification of all targets, which is valuable information on both the main CoRoT project and additional science programs, by means of cross-correlation with MK standard stars, by using artificial neural networks. The presence or absence of excess Hα emission, determined using spectral subtraction technique, is used to characterize the chromospheric activity level.In most cases our MK classification agrees with the spectral classification reported in the SIMBAD database; however, there are a few stars that are found to have very different MK classes. Our survey reveals that ∼7% of late-type stars in our sample indeed possess a very active chromosphere. The measured Hα excess and the presence of the 6708Å Li line allow us to confirm the membership of 5 targets in the young open cluster NGC2264.

Abstract Copyright:

Journal keyword(s): stars: late-type - stars: activity - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/469/713): table12.dat table35.dat fig/*>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * 47 Psc LP* 00 28 02.9147612952 +17 53 35.257375248 8.53 6.71 5.06 3.32 1.78 M3III 98 0
2 HD 4628 PM* 00 48 22.9759750919 +05 16 50.209484954 7.22 6.64 5.74 4.99 4.52 K2.5V 473 0
3 V* SW Mon LP* 06 27 00.9759499560 +05 22 43.790629584   11.44 10.07     M4III 28 0
4 G 108-4 SB* 06 29 50.2964229552 -02 47 45.686124420   15.349 13.832 13.561 11.02 M4.0V 21 0
5 HD 46122 Ro* 06 31 46.0581912120 +06 47 07.670130900   8.11 7.274   6.465 G3IV 37 0
6 NGC 2264 33 * 06 39 55.7620743288 +09 34 28.369796016 16.988 14.12 11.67 10.83 8.870 M1 19 0
7 NGC 2264 OpC 06 40 52 +09 52.6           ~ 1693 0
8 V* IO Mon TT* 06 40 58.836576 +09 30 57.26412   15.30 14.04 13.11 12.49 K2/3e 61 0
9 NGC 2264 134 TT* 06 40 59.3436338472 +09 55 20.165321712 13.918 13.22 12.38 11.908 11.47 G5V 54 0
10 V* IP Mon TT* 06 41 00.9824167032 +09 32 44.468341836 15.55 14.77 13.48 12.68 11.92 K1 73 0
11 V* MM Mon TT* 06 41 12.5779548384 +09 52 31.240334424 15.77 15.46 14.28 13.55 12.82 G:V:e 56 0
12 V* MO Mon TT* 06 41 31.1198311872 +09 26 58.278986988 14.85 14.87 13.85 13.19 12.56 K4 68 0
13 HD 262323 * 06 42 08.2106287296 +05 03 35.092082520   10.00 8.72     K2Ib 8 0
14 V* PZ Mon RG* 06 48 21.0659534040 +01 13 08.309040528   10.18 9.60     K2III 44 0
15 PM J06528-0524 PM* 06 52 53.9183020800 -05 24 41.376264516   13.765 12.247 11.879   K7V 11 0
16 V* X Mon Mi* 06 57 11.8136948784 -09 03 52.156579572 10.09 8.61 7.07     K5-M6e 77 0
17 V* V926 Mon LP* 07 02 06.7316120112 -03 45 17.396855712   8.25 6.62     M2Ib+B7/9?IV: 27 0
18 HD 52919 PM* 07 02 42.9174539135 -06 47 57.214117747 10.45 9.442 8.351 7.708 7.18 K4V 76 0
19 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 673 0
20 V* EK Boo LP? 14 46 05.9426993007 +15 07 54.411177125 8.51 7.20 5.63     M5+IIIab 74 0
21 * 93 Her * 18 00 03.4165173504 +16 45 03.304594368 7.15 5.93 4.67 3.80 3.21 K0.5IIb 136 0
22 HD 168159 PM* 18 18 40.6785730368 -06 42 03.715604136   10.32 9.29     K3V 47 0
23 HD 170493 PM* 18 29 52.4075052264 -01 49 05.170343700 10.187 9.11 8.004 7.374 6.871 K4V 117 0
24 NGC 6705 602 * 18 51 17.9300632080 -06 12 42.697064160   16.166 15.482     ~ 8 0
25 HD 175545 PM* 18 55 51.4488060720 -00 44 22.116864048   8.60 7.40     K2III 41 0
26 HD 175905 PM* 18 57 35.9598457872 -00 31 34.936798008   8.82 7.66     K0/1III 20 0
27 HD 178126 PM* 19 07 02.0407765619 +07 36 57.153485718 11.243 10.297 9.215 8.559 7.996 K5V 65 0
28 * eta Cyg * 19 56 18.3722223 +35 05 00.322759 5.800 4.910 3.880 3.19 2.66 K0III 275 0
29 HD 190360 PM* 20 03 37.4050868074 +29 53 48.492435887   6.44   5.2   G7IV-V 417 1
30 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 998 0
31 * eps Peg LP* 21 44 11.1561394 +09 52 30.031152 5.61 3.91 2.39 1.34 0.58 K2Ib-II 438 0
32 HD 219134 Er* 23 13 16.9749603608 +57 10 06.083823619 7.460 6.560 5.570 4.76 4.23 K3V 559 1

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2022.08.15-14:56:22

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