2010MNRAS.408.2290G


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.09CEST16:01:19

2010MNRAS.408.2290G - Mon. Not. R. Astron. Soc., 408, 2290-2297 (2010/November-2)

Systematic detection of magnetic fields in massive, late-type supergiants.

GRUNHUT J.H., WADE G.A., HANES D.A. and ALECIAN E.

Abstract (from CDS):

We report the systematic detection of magnetic fields in massive (M > 5M) late-type supergiants, using spectropolarimetric observations obtained with ESPaDOnS at the Canada-France-Hawaii Telescope. Our observations reveal detectable Stokes V Zeeman signatures in least-squares deconvolved mean line profiles in one-third of the observed sample of more than 30 stars. The signatures are sometimes complex, revealing multiple reversals across the line. The corresponding longitudinal magnetic field is seldom detected, although our longitudinal field error bars are typically 0.3 G (1σ). These characteristics suggest topologically complex magnetic fields, presumably generated by dynamo action. The Stokes V signatures of some targets show clear time variability, indicating either rotational modulation or intrinsic evolution of the magnetic field. We also observe a weak correlation between the unsigned longitudinal magnetic field and the Caii K core emission equivalent width of the active G2Iab supergiant β Dra and the G8Ib supergiant ε Gem.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): techniques: polarimetric - techniques: spectropolarimetry - stars: late-type - stars: magnetic field - stars: massive - stars: supergiants

Status at CDS:  

Simbad objects: 33

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Number of rows : 33

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 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 796 2
2 * eps Aur Al* 05 01 58.1290610816 +43 49 23.871349520 3.86 3.53 2.99 2.47 2.02 A9Ia 553 0
3 * alf Lep V* 05 32 43.8161188 -17 49 20.241380 3.02 2.77 2.57 2.35 2.14 F0Ib 268 0
4 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1457 0
5 * eps Gem V* 06 43 55.9262590 +25 07 52.051484 5.85 4.39 2.98 2.01 1.40 G8Ib 378 0
6 * sig CMa LP* 07 01 43.1477846 -27 56 05.389774 7.08 5.20 3.47 2.15 1.15 K5Ib 164 0
7 * zet Gem cC* 07 04 06.5307903 +20 34 13.073871 5.20 4.58 3.79   3.082 G1Ib 528 0
8 * del CMa s*y 07 08 23.4840514 -26 23 35.518484 3.06 2.52 1.84 1.33 1.00 F8Ia 325 0
9 * pi. Pup LP* 07 17 08.55678 -37 05 50.8962 5.57 4.32 2.70 1.46 0.55 K3Ib+B5+ 100 0
10 * l Pup sg* 07 43 48.4687222 -28 57 17.372015 4.06 4.09 3.93 3.68 3.50 A4Iabe 174 0
11 * c Pup * 07 45 15.2964161 -37 58 06.899807 7.06 5.34 3.61 2.26 1.26 K4III 90 0
12 * ksi Pup * 07 49 17.6556658 -24 51 35.230469 5.72 4.56 3.30 2.43 1.88 G6Ib 182 0
13 * B Vel SB* 08 22 31.69411 -48 29 25.3631 3.83 4.67 4.82 4.86 4.99 B2III 82 1
14 * bet Pyx * 08 40 06.1436306 -35 18 30.065139   4.885 3.954     G5II/III 66 0
15 * F Hya * 08 43 40.3734513 -07 14 01.432289   5.441 4.625     G1Ib 150 0
16 HD 77912 Pe* 09 06 31.7685981338 +38 27 07.975612689   5.567 4.539     G7IIa 150 0
17 * lam Vel LP* 09 07 59.75787 -43 25 57.3273 5.67 3.86 2.21 0.97 0.03 K4Ib 202 0
18 * eta Leo * 10 07 19.9518606 +16 45 45.580270 3.17 3.39 3.41 3.32 3.35 A0Ib 316 1
19 V* LN Hya pA* 12 56 30.1305303615 -26 27 37.045549397   9.104 8.697   9.291 F3Ia 103 0
20 HD 115337 * 13 12 25.43120 +80 28 16.7066   7.335 6.329     K0Ib 23 1
21 * d Cen ** 13 31 02.6565951 -39 24 26.298992 6.08 5.04 3.88 3.04 2.45 G8II/III 73 0
22 * 83 Vir * 13 44 29.8270057108 -16 10 44.663786459   6.350 5.567     G0II: 82 0
23 * alf Sco ** 16 29 24.45970 -26 25 55.2094 4.08 2.75 0.91 -0.64 -1.87 M0.5Iab+B3V: 687 1
24 * bet Dra * 17 30 25.9616959 +52 18 04.999351 4.43 3.79 2.81 2.12 1.64 G2Ib-IIa 391 0
25 * eta Aql cC* 19 52 28.3677478 +01 00 20.369619 5.12 4.61 3.80   3.030 F6Iab+B9.8V 630 0
26 * omi02 Cyg Al* 20 15 28.3216287393 +47 42 51.221859715 6.54 5.50 3.98 2.78 1.86 K7Ib-II+B1V 318 0
27 * gam Cyg V* 20 22 13.7018357 +40 15 24.044963 3.44 2.90 2.23 1.74 1.40 F8Ib 550 0
28 * alf Cyg sg* 20 41 25.91514 +45 16 49.2197 1.11 1.34 1.25 1.14 1.04 A2Ia 714 0
29 * ksi Cyg SB* 21 04 55.8622910 +43 55 40.264460 7.17 5.39 3.73 2.55 1.63 K4.5Ib-II 294 0
30 * bet Aqr * 21 31 33.5317148 -05 34 16.232006 4.27 3.71 2.89 2.29 1.84 G0Ib 429 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 430 0
32 * alf Aqr * 22 05 47.0359315 -00 19 11.456766 4.65 3.90 2.94 2.27 1.76 G2Ib 419 0
33 * del Cep cC* 22 29 10.2650184 +58 24 54.713856 4.71 4.35 3.75   3.219 F5Iab:+B7-8 674 0

    Equat.    Gal    SGal    Ecl

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2020.04.09-16:01:19

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