2016MNRAS.459..854Z

Query : 2016MNRAS.459..854Z

2016MNRAS.459..854Z - Mon. Not. R. Astron. Soc., 459, 854-862 (2016/June-2)

Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations.

ZHANG L., PI Q., HAN X.L., CHANG L. and WANG D.

Abstract (from CDS):

We present new 14 high-resolution echelle spectra to discuss the level of chromospheric activity of DM UMa in D3, D1, D2, Hα, and infrared triplet lines (IRT). It is the first time to discover the emissions above the continuum in the D3 lines on 2015 February 9 and 10. The emission on February 9 is the strongest one ever detected for DM UMa. We analysed these chromospheric active indicators by employing the spectral subtraction technique. The subtracted spectra reveal weak emissions in the D1, D2 lines, strong emission in the Hα line, and clear excess emissions in the IRT lines. Our values for the EW8542/EW8498 ratio are on the low side, in the range of 1.0-1.7. There are also clear phase variations of the level of chromospheric activity in equivalent width (EW) light curves in these chromospheric active lines (especially the Hα line). These phenomena might be explained by flare events or rotational modulations of the level of chromospheric activity.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: activity - binaries: spectroscopic - stars: chromospheres - stars: individual: DM UMa - stars: late-type

Simbad objects: 38

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Number of rows : 38
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 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8 356 0
2 V* PW And RS* 00 18 20.8895755560 +30 57 22.129174872   9.78 8.86 8.3 7.78 K2V 123 1
3 HD 10486 PM* 01 43 16.5039312816 +45 19 21.537082092 8.31 7.36 6.32 5.58 5.09 K2IV 64 0
4 * alf Ari PM* 02 07 10.40570 +23 27 44.7032 4.29 3.17 2.01 1.15 0.54 K2-IIIbCa-1 622 2
5 V* VY Ari RS* 02 48 43.7287198695 +31 06 54.592461256   7.72   6.4   G9 225 0
6 V* UX Ari RS* 03 26 35.3756804760 +28 42 54.226408428 7.76 7.28 6.37     K0IV 697 0
7 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1932 1
8 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1167 0
9 V* DF Cam SB* 04 05 42.3366475272 +57 07 37.042517244   10.15 9.07     K2IIIe 19 0
10 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 462 0
11 V* V492 Per RS* 04 31 56.9457704280 +36 44 33.679327272   7.43 6.34     G5 49 0
12 V* YZ Men RS* 05 10 26.7502372080 -77 13 01.526708712   8.85 7.77   6.566 K1IIIp 49 0
13 HD 33978 SB* 05 13 05.2256060424 -23 57 51.667937676   9.38 8.34     K1III 20 0
14 V* V344 Pup RS* 07 36 13.8053448264 -44 57 27.454999500   7.95 6.89     K2III 55 0
15 * sig Gem RS* 07 43 18.7276907303 +28 53 00.631838445 6.38 5.41 4.29 3.37 2.79 K1IIIe 478 0
16 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1101 2
17 HD 80492 SB* 09 21 15.4745589600 +39 39 59.320532376   7.590 6.645     K0 30 0
18 V* IL Hya RS* 09 24 49.0136973144 -23 49 34.714396272   8.38 7.37     K2IV/Vp 169 0
19 V* LQ Hya BY* 09 32 25.5683895648 -11 11 04.692242760 9.316 8.761 7.891 7.288 6.815 K1Vp 459 0
20 V* LZ Vel RS* 09 54 39.0970762560 -43 19 16.126391424   8.459 7.185     K2IIIp 29 0
21 V* DR Oct RS* 10 07 29.5296132223 -85 04 32.990588292   9.42 8.685   7.709 G3V 110 0
22 * 33 Sex PM* 10 41 24.1859419344 -01 44 29.371097184   7.145 6.250     G9IV 170 0
23 V* DM UMa RS* 10 55 43.5438405648 +60 28 09.721480656   10.31 9.29     K0III-IV 165 0
24 V* HU Vir RS* 12 13 20.6914862928 -09 04 46.880926320   9.69 8.71   7.639 K1V 146 0
25 V* OX Ser LP* 15 29 44.4519705648 +16 11 31.207325784   8.17 7.176   6.289 K0 28 0
26 V* V2253 Oph RS* 16 52 56.0064590544 -26 45 02.338407216   9.66 8.490   7.336 K0III 41 0
27 V* V889 Her BY* 18 34 20.1028767504 +18 41 24.234675864   8.00 7.449   6.720 G2V 139 0
28 TYC 2642-127-1 SB* 18 50 01.7338249200 +33 08 14.347403448   11.48 10.69     K0III/IVe 11 0
29 V* V1764 Cyg RS* 19 36 42.5793658488 +27 53 02.891977404   8.99 7.78     K1III: 86 0
30 2E 1937.0+3027 X 19 39 02.2 +30 34 36           ~ 4 0
31 V* V4091 Sgr RS* 20 06 02.6690472984 -18 42 15.753611556   9.61 8.45     G8/K0Vp 55 0
32 V* AT Cap RS* 20 29 36.8563920384 -21 07 34.735819908   10.15 8.874   7.637 G6III/IV 65 0
33 V* HK Lac RS* 22 04 56.6083608840 +47 14 04.479131004   8.01 6.96     K0III 242 0
34 V* V383 Lac BY* 22 20 07.0254050808 +49 30 11.767337496   9.42 8.58     K1V 77 0
35 V* V350 Lac RS* 22 30 06.5036358504 +49 21 23.084756172   7.59 6.42     K2III 135 0
36 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 338 1
37 V* SZ Psc RS* 23 13 23.7784875720 +02 40 31.602660924   8.19 7.44   6.390 G5Vp 318 1
38 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 729 0

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