2016MNRAS.457.3178P

Query : 2016MNRAS.457.3178P

2016MNRAS.457.3178P - Mon. Not. R. Astron. Soc., 457, 3178-3190 (2016/April-2)

Broad-band linear polarization in late-type active dwarfs.

PATEL M.K., PANDEY J.C., KARMAKAR S., SRIVASTAVA D.C. and SAVANOV I.S.

Abstract (from CDS):

We present recent polarimetric results of magnetically active late-type dwarfs. The polarization in these stars is found to be wavelength dependent, decreasing towards the longer wavelength. The average values of degree of polarization in these active dwarfs are found to be 0.16±0.01, 0.080±0.006, 0.056±0.004 and 0.042±0.003 per cent in B, V, R, and I bands, respectively. Present results indicate that polarization in the majority of active dwarfs are primarily due to sum of the polarization by magnetic intensification and scattering. However, supplementary sources of the polarization are also found to be present in some active stars. The correlations between the degree of polarization and various activity parameters like Rossby number, chromospheric activity indicator and coronal activity indicator are found to be stronger in B band and weaker in I band.

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

Journal keyword(s): techniques: polarimetric - stars: activity - stars: late-type - stars: magnetic field - starspots

Simbad objects: 73

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Number of rows : 73
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 V* PW And RS* 00 18 20.8895755560 +30 57 22.129174872   9.78 8.86 8.3 7.78 K2V 136 1
2 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 510 0
3 V* BK Psc RS* 00 39 42.1680689320 +10 39 13.676734430   11.73 10.488 10.038 8.933 K5V+M3V 62 0
4 HD 236633 Pu* 01 09 12.3404400384 +60 37 40.963644444 8.96 9.49 9.2     B0 59 0
5 BD-04 234 * 01 34 30.1326329040 -03 18 51.082823016   10.41 9.90     G0 3 0
6 HD 236928 * 02 02 42.0929404728 +60 15 26.433482364   10.00 9.07     A4Ib 108 0
7 HD 14069 * 02 16 45.1936420248 +07 41 10.637150532   9.21 9.06     A0 61 0
8 V* CC Cas SB* 03 14 05.3361655368 +59 33 48.485582712 7.07 7.56 7.08     O8.5III(n)((f)) 308 0
9 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 948 0
10 HD 20998 * 03 23 02.2868971536 -09 35 01.302751320   10.39 9.32     G8IV 6 0
11 V* V1221 Tau BY* 04 05 53.4199914648 +05 31 25.129544728   16.984 15.366 15.220   M3e 26 0
12 HD 25443 * 04 06 08.0655259656 +62 06 06.607649268 6.45 6.998 6.766     B0.5III 155 0
13 * 50 Per RS* 04 08 36.6171573432 +38 02 23.058806100 7.78 5.97   5.2   F8V 238 0
14 V* V988 Tau BY* 04 23 22.8504016872 +19 39 31.317351336   10.290 9.381     K0 138 0
15 V* V1147 Tau PM* 04 32 25.6543195680 +13 06 47.639129076   12.189 11.000 10.64 9.443 K5V 100 0
16 V* V526 Aur BY* 05 01 47.6406712728 +38 05 41.887459392   11.36 10.83 10.54   G0 8 0
17 HD 37394 BY* 05 41 20.3356800431 +53 28 51.808818686 7.58 7.07 6.23 5.54 5.11 K0V 365 0
18 HD 258857 BY* 06 31 11.0830397832 +05 52 36.964991028       8.4   K2V 31 0
19 HD 261557 BY* 06 39 31.36090 +03 19 10.6876   10.25 9.31 9.21   K3V 26 0
20 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 101 0
21 HD 60491 BY* 07 34 26.1676173360 -06 53 48.036803172 9.554 9.027 8.144 7.654 7.214 K1V 99 0
22 BD+23 1799 Ro* 07 43 35.1459295728 +22 42 48.711104892   11.11 9.98   8.568 K0 20 0
23 V* FR Cnc BY* 08 32 30.5296878048 +15 49 26.229486900   11.42 10.25 9.788   K7e 41 0
24 BD+23 1978 BY* 08 36 55.78162 +23 14 47.9532   10.25 9.35 9.07   K5V 34 0
25 BD+08 2131 LM* 08 50 42.24016 +07 51 52.5396   10.39 9.41 8.98   K5V 65 0
26 V* V402 Hya BY* 08 53 12.0881508072 -07 43 21.158270760   9.75 9.087   8.023 K0III 27 0
27 HD 77825 BY* 09 04 20.6940062640 -15 54 51.301830636   9.75 8.758   7.703 K2V 70 0
28 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
29 * tet UMa PM* 09 32 51.4309337983 +51 40 38.333310508 3.67 3.64 3.18 2.74 2.47 F7V 434 0
30 V* GT Leo BY* 09 42 09.9291843864 +07 35 24.538691112       8.3   K0V 40 0
31 HD 87424 BY* 10 04 37.6589333352 -11 43 46.919496972 9.643 9.075 8.149 8.78 7.173 K2Vk: 82 0
32 V* LR Hya BY* 10 36 02.2111787040 -11 54 47.931891552   8.89 8.03     K1.5Vk: 79 0
33 V* V418 Hya PM* 10 36 30.7919314944 -13 50 35.824038468   9.60 8.75     K2V 48 0
34 * bet UMa PM* 11 01 50.4797515135 +56 22 56.761138187 2.35 2.35 2.37 2.31 2.35 A1IVps 462 0
35 V* AB Crt BY* 11 02 50.1233744664 -09 19 49.093627692   10.03 9.04     K3V 34 0
36 HD 101906 BY* 11 43 47.0442548520 +24 00 37.190409372   8.25 7.386   6.494 G2V 33 0
37 V* GQ Leo PM* 11 47 45.7261738608 +12 54 03.350877372   11.92 10.831 10.508   K5Ve 28 0
38 V* PQ Vir PM* 11 49 28.0638195696 +00 36 32.919356268   10.02 9.13     K0V 29 0
39 BD+48 1978 BY* 11 51 57.88938 +48 05 19.2088       8.99   K2V 53 0
40 HD 103720 BY* 11 56 41.1855288192 -02 46 44.236262136   10.44 9.49     K1IV/V 73 0
41 V* FZ Leo SB* 11 58 01.0011016968 +14 02 16.547471628 9.030 8.990 8.430   7.681 G5 41 0
42 V* LV Com BY* 12 07 50.9218409928 +18 56 55.811838084   10.09 9.16     K2V 35 0
43 V* DO CVn BY* 12 35 51.2877348744 +51 13 17.314169592   9.50 8.54     K0 62 0
44 GD 319 ** 12 50 04.422072 +55 06 02.11932   12.398 12.259 12.147   sdOB+K3V 88 0
45 V* LX Com BY* 12 51 38.4093800088 +25 30 31.790649348   9.97 9.10 8.4   K1V 55 0
46 V* PX Vir BY* 13 03 49.6546871 -05 09 42.517119 9.042 8.555 7.679 7.185 6.721 K1V 140 0
47 * alf Com A PM* 13 09 59.285492 +17 31 45.85645   5.25 4.80     F5V 247 0
48 * bet Com PM* 13 11 52.3938268062 +27 52 41.462309460 4.92 4.84 4.25 3.77 3.47 F9.5V 946 0
49 * e Vir PM* 13 16 46.5148594512 +09 25 26.960139646   5.81   4.8   G0IV 590 1
50 V* GY Boo BY* 14 12 41.5601008536 +23 48 51.526381356   9.87 8.90     K0V 42 0
51 V* GZ Boo BY* 14 21 08.8588042176 +37 24 03.696923088   9.77 8.87 8.2   K0 34 0
52 HD 126053 PM* 14 23 15.2847745835 +01 14 29.641269692 6.98 6.90 6.27 5.71 5.39 G1.5V 442 0
53 V* EK Dra BY* 14 39 00.2104038120 +64 17 29.979649860   8.243 7.604     G5VFe-0.7CH-1(k) 500 0
54 V* HO Boo BY* 14 46 03.0717865416 +27 30 44.450918676   8.81 7.96     K2V 43 0
55 V* FN Boo MS* 15 31 46.8163964586 +47 03 24.609586826       9.957   K6V 52 1
56 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 456 0
57 * chi Her PM* 15 52 40.5410491705 +42 27 05.462878877 5.19 5.19 4.62 4.14 3.82 F8VFe-2Hdel-1 532 0
58 StKM 1-1294 PM* 15 58 10.2949780464 +49 27 08.288698284   13.08   11.315   M1.0Ve 30 0
59 V* MS Ser BY* 15 58 43.9452509832 +25 34 10.427623284   9.21 8.347   7.201 G/K:e 110 0
60 V* V2213 Oph BY* 17 05 16.8186610814 +00 42 09.221511649   6.59   5.6   F8.5IV-V 352 0
61 HD 154445 * 17 05 32.2587926880 -00 53 31.437713328 5.10 5.73 5.61 5.39 5.34 B1V 276 0
62 HD 182101 PM* 19 22 48.3509531208 +09 54 47.340798372   6.789 6.346     F6V 127 0
63 * 17 Cyg PM* 19 46 25.6000487071 +33 43 39.353533637   5.46   4.7   F5.5IV-V 290 0
64 V* V1658 Aql BY* 20 10 43.8204114144 +04 54 49.226647284   10.46 9.35   8.380 K1(III) 18 0
65 V* V1659 Aql BY* 20 11 03.2838417048 +04 55 09.608433780   9.95 8.87     K0/1(III) 7 0
66 HD 340923 PM* 20 43 00.1746378312 +26 48 33.741669024   11.86 10.83 8.63 9.517 K3 25 0
67 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 1099 0
68 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 372 0
69 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 561 0
70 HD 208313 BY* 21 54 45.0393081915 +32 19 42.840436429   8.69   7.1   K1 116 0
71 BD+15 4538 SB* 21 59 40.1160339696 +16 02 17.981956860   10.55 9.74     K0 19 0
72 V* V383 Lac BY* 22 20 07.0254050808 +49 30 11.767337496   9.42 8.58     K1V 85 0
73 HD 218782 BY* 23 10 36.9186396144 +20 55 26.241301812   10.83 10.03 9.92 9.055 K2 11 0

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