2019A&A...626A..86S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:39:41

2019A&A...626A..86S - Astronomy and Astrophysics, volume 626A, 86-86 (2019/6-1)

Magnetic fields in M dwarfs from the CARMENES survey.

SHULYAK D., REINERS A., NAGEL E., TAL-OR L., CABALLERO J.A., ZECHMEISTER M., BEJAR V.J.S., CORTES-CONTRERAS M., MARTIN E.L., KAMINSKI A., RIBAS I., QUIRRENBACH A., AMADO P.J., ANGLADA-ESCUDE G., BAUER F.F., DREIZLER S., GUENTHER E.W., HENNING T., JEFFERS S.V., KURSTER M., LAFARGA M., MONTES D., MORALES J.C. and PEDRAZ S.

Abstract (from CDS):


Context. M dwarfs are known to generate the strongest magnetic fields among main-sequence stars with convective envelopes, but we are still lacking a consistent picture of the link between the magnetic fields and underlying dynamo mechanisms, rotation, and activity.
Aims. In this work we aim to measure magnetic fields from the high-resolution near-infrared spectra taken with the CARMENES radial-velocity planet survey in a sample of 29 active M dwarfs and compare our results against stellar parameters.
Methods. We used the state-of-the-art radiative transfer code to measure total magnetic flux densities from the Zeeman broadening of spectral lines and filling factors.
Results. We detect strong kG magnetic fields in all our targets. In 16 stars the magnetic fields were measured for the first time. Our measurements are consistent with the magnetic field saturation in stars with rotation periods P<4d. The analysis of the magnetic filling factors reveal two different patterns of either very smooth distribution or a more patchy one, which can be connected to the dynamo state of the stars and/or stellar mass.
Conclusions. Our measurements extend the list of M dwarfs with strong surface magnetic fields. They also allow us to better constrain the interplay between the magnetic energy, stellar rotation, and underlying dynamo action. The high spectral resolution and observations at near-infrared wavelengths are the beneficial capabilities of the CARMENES instrument that allow us to address important questions about the stellar magnetism.

Abstract Copyright: © D. Shulyak et al. 2019

Journal keyword(s): stars: low-mass - stars: magnetic field - stars: rotation - stars: atmospheres

CDS comments: Table 1 KARMN J18356+329 and KARMN J19255+096 not in SIMBAD.

Simbad objects: 47

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Number of rows : 47

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 Wolf 47 Er* 01 03 19.8342607685 +62 21 55.831198996   15.34   12.4   M5V 164 0
2 Barta 161 12 SB* 01 35 13.9238924192 -07 12 51.455163714   14.93 13.43 13.053 10.52 M4.3V 51 0
3 G 272-61 ** 01 39 01.201 -17 57 02.66   13.93 12.08 11.782 8.93 M5.5V+M6V 44 0
4 G 272-61A Er* 01 39 01.3765356886 -17 57 02.399297242           M5.5V 99 0
5 G 272-61B Er* 01 39 01.6334059022 -17 57 01.121866655           M6V 791 0
6 G 173-39 Fl* 02 08 53.6242116101 +49 26 56.440779580   14.01   12.118   M4.0V 52 0
7 LP 412-31 LM* 03 20 59.7107396327 +18 54 22.772041176   20.5 18.881 16.904 14.484 M8V 110 0
8 G 80-21 PM* 03 47 23.3412010775 -01 58 19.945342289 14.052 13.048 11.537 10.452 9.098 M3.0V 81 0
9 UCAC4 554-010638 Er* 04 47 12.2486047573 +20 38 10.799382900   16.0 14.216 13.988   M5.0V 22 0
10 V* V2689 Ori RS* 05 36 30.9904303980 +11 19 40.331999226 11.508 10.276 8.898 7.963 7.140 K6V 112 0
11 G 99-49 Fl* 06 00 03.5038608130 +02 42 23.596778811   13.01 11.31 10.04 8.43 M3.5Ve 102 0
12 * alf Gem C BY* 07 34 37.4475372002 +31 52 10.181030942 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 817 0
13 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
14 G 51-15 Er* 08 29 49.3528237575 +26 46 33.626773321   16.87   14.736   M6.5Ve 254 0
15 G 161-71 PM* 09 44 54.1925131725 -12 20 54.374177667   15.47 13.646 13.467 10.353 M5.0V 42 0
16 BD+20 2465 Er* 10 19 36.2808024653 +19 52 12.014037746   10.82 9.52 9.19   M4Vae 1145 0
17 LP 731-58 Fl* 10 48 12.6142482968 -11 20 09.609457904     15.784 16.01 11.25 M6.5V 142 0
18 Wolf 359 Er* 10 56 28.826208 +07 00 52.34400 16.706 15.541 13.507 11.684 9.507 M6Ve 633 0
19 V* DS Leo BY* 11 02 38.3419263291 +21 58 01.704479733 12.246 11.049 9.572 8.638 7.634 M1.0V 171 0
20 BD+44 2051B Er* 11 05 30.8856443432 +43 31 17.884318012   16.45 14.45 13.4   M6.0V 208 0
21 G 13-22 Fl* 12 14 16.5495795124 +00 37 26.365993362   15.40   13.309   M4.5Ve 66 0
22 StKM 2-809 PM* 12 15 39.3673552228 +52 39 08.720024785     12.564 12.197   M4.0V 23 0
23 V* GL Vir Er* 12 18 59.3999178645 +11 07 33.770248089   15.68 13.90 13.55   M4.5Ve 137 0
24 Wolf 461 Er* 13 00 33.5210484063 +05 41 08.003260810   15.12   13.041   M4.5Ve 109 0
25 BD+13 2618 Er* 13 00 46.5602816848 +12 22 32.716799085 12.314 11.233 9.750 8.785 7.653 M0V 303 1
26 FBS 1415+456 PM* 14 17 22.1023718376 +45 25 45.996305049   15.73 14.21 13.93   M5/6 15 0
27 V* OT Ser Ro* 15 21 52.9325996324 +20 58 39.910979308 12.662 11.522 10.003 8.993 7.843 M1.0V 106 0
28 G 256-25 PM* 15 49 55.1562345162 +79 39 51.645141756   16.3   14.408   M5.0V 19 0
29 G 180-60 Fl* 16 31 18.7890545317 +40 51 51.704950897   16.5   14.550   M6V 46 0
30 VB 8 Fl* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 381 0
31 G 19-7 Fl* 16 57 05.7363418748 -04 20 56.317527343   13.92 12.25 10.99 9.432 M3.5Ve 76 0
32 LSPM J1733+1655 BY* 17 33 53.1638454477 +16 55 12.835817374   16.13 14.38 14.04 10.896 M6V 28 0
33 G 227-22 PM* 18 02 16.6046894780 +64 15 44.238912144   14.74   13.010   M5.0V 51 0
34 G 258-33 Fl* 18 18 57.2324145507 +66 11 33.301424583   15.29   13.096   M4.5V 69 0
35 Ross 154 Er* 18 49 49.3638007809 -23 50 10.453568573 13.528 12.19 10.43 10.23 7.703 M3.5Ve 323 0
36 HD 180617 Ro* 19 16 55.2565250393 +05 10 08.038856129 11.768 10.63 9.115 8.076 6.782 M3-V 349 0
37 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 435 1
38 G 208-42 Fl* 19 51 09.3205269987 +46 29 00.208931632   14.47   12.544   M4.0V 106 0
39 G 208-45 Er* 19 53 55.1388332012 +44 24 54.144273353   15.97 13.99 14.3 10.27 M6V 160 0
40 UCAC4 444-118477 PM* 20 09 18.2473320307 -01 13 38.317187107     14.47 12.98 11.16 M5.0V 19 0
41 V* AU Mic BY* 20 45 09.5323695486 -31 20 27.241710746   10.05 8.627 9.078 6.593 M1VeBa1 893 0
42 V* V374 Peg Er* 22 01 13.1233106147 +28 18 24.913041858       11.602   M3.5Ve 165 0
43 V* EV Lac Er* 22 46 49.7311740821 +44 20 02.372223230   11.85 10.26 9.89   M4.0V 800 2
44 V* GT Peg BY* 22 51 53.5351541240 +31 45 15.195567260       11.281   M3.5V 135 0
45 BD+19 5116A Er* 23 31 52.1743012110 +19 56 14.128443009   12.27 10.173 9.946   M3.5Ve 73 0
46 BD+19 5116B Er* 23 31 52.5741250923 +19 56 14.004074575   14.8   12.165   M4.0Ve 173 0
47 RX J2354.8+3831 PM* 23 54 51.4574111640 +38 31 36.200571993   14.78   12.94   M3.1V 31 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:39:41

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