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 - 2026 		#notes
1 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8V 392 0
2 V* PW And RS* 00 18 20.8895755560 +30 57 22.129174872   9.78 8.86 8.3 7.78 K2V 136 1
3 HD 10486 PM* 01 43 16.5039312816 +45 19 21.537082092 8.31 7.36 6.32 5.58 5.09 K0 71 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-1 644 2
5 V* VY Ari RS* 02 48 43.7287198695 +31 06 54.592461256   7.72   6.4   G9 241 0
6 V* UX Ari RS* 03 26 35.3756804760 +28 42 54.226408428 7.76 7.28 6.37     K0IV 726 0
7 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 2073 1
8 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
9 V* DF Cam SB* 04 05 42.3366475272 +57 07 37.042517244   10.15 9.07     K2IIIe 20 0
10 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 483 0
11 V* V492 Per RS* 04 31 56.9457704280 +36 44 33.679327272   7.43 6.34     G5 53 0
12 V* YZ Men RS* 05 10 26.7502372080 -77 13 01.526708712   8.85 7.77   6.566 K1IIIp 53 0
13 HD 33978 SB* 05 13 05.2256060424 -23 57 51.667937676   9.38 8.34     K1III 21 0
14 V* V344 Pup RS* 07 36 13.8053448264 -44 57 27.454999500   7.95 6.89     K2III 61 0
15 * sig Gem RS* 07 43 18.7276907303 +28 53 00.631838445 6.38 5.41 4.29 3.37 2.79 K1IIIe 499 0
16 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1150 2
17 HD 80492 SB* 09 21 15.4745589600 +39 39 59.320532376   7.590 6.645     K0 35 0
18 V* IL Hya RS* 09 24 49.0136973144 -23 49 34.714396272   8.38 7.37     K2IV/Vp 176 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 480 0
20 V* LZ Vel RS* 09 54 39.0970762560 -43 19 16.126391424   8.459 7.185     K2IIIp 35 0
21 V* DR Oct RS* 10 07 29.5296132223 -85 04 32.990588292   9.42 8.685   7.709 G3V 116 0
22 * 33 Sex PM* 10 41 24.1859419344 -01 44 29.371097184   7.145 6.250     G9IV 182 0
23 V* DM UMa RS* 10 55 43.5438405648 +60 28 09.721480656   10.31 9.29     K0III-IV 176 0
24 V* HU Vir RS* 12 13 20.6914862928 -09 04 46.880926320   9.69 8.71   7.639 K1V 154 0
25 V* OX Ser LP* 15 29 44.4519705648 +16 11 31.207325784   8.17 7.176   6.289 K0 33 0
26 V* V2253 Oph RS* 16 52 56.0064590544 -26 45 02.338407216   9.66 8.490   7.336 K0III 43 0
27 V* V889 Her BY* 18 34 20.1028767504 +18 41 24.234675864   8.00 7.449   6.720 G2V 151 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: 90 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 58 0
32 V* AT Cap RS* 20 29 36.8563920384 -21 07 34.735819908   10.15 8.874   7.637 G6III/IV 67 0
33 V* HK Lac RS* 22 04 56.6083608840 +47 14 04.479131004   8.01 6.96     K0III 250 0
34 V* V383 Lac BY* 22 20 07.0254050808 +49 30 11.767337496   9.42 8.58     K1V 85 0
35 V* V350 Lac SB* 22 30 06.5036358504 +49 21 23.084756172   7.59 6.42     K2III 143 0
36 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 357 1
37 V* SZ Psc RS* 23 13 23.7784875720 +02 40 31.602660924   8.19 7.44   6.390 G5Vp 333 1
38 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 756 0

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