The two magnetic components in the Herbig Ae SB2 system HD 104237

The two magnetic components in the Herbig Ae SB2 system HD 104237

ABSTRACT We present longitudinal magnetic field measurements 〈Bz〉 for the Herbig Ae primary and the T Tauri secondary in the SB2 system HD 104237. These measurements were carried out using high spectral resolution observations obtained with the High Accuracy Radial velocity Planet Searcher in polari...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2019-07, Vol.486 (4), p.5499-5503
Hauptverfasser: Järvinen, S P, Carroll, T A, Hubrig, S, Ilyin, I, Schöller, M, Drake, N A, Pogodin, M A
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container_issue 4
container_start_page 5499
container_title Monthly notices of the Royal Astronomical Society
container_volume 486
creator Järvinen, S P
Carroll, T A
Hubrig, S
Ilyin, I
Schöller, M
Drake, N A
Pogodin, M A
description ABSTRACT We present longitudinal magnetic field measurements 〈Bz〉 for the Herbig Ae primary and the T Tauri secondary in the SB2 system HD 104237. These measurements were carried out using high spectral resolution observations obtained with the High Accuracy Radial velocity Planet Searcher in polarimetric mode, installed at the ESO La Silla 3.6 m telescope. In agreement with previous studies of Herbig Ae stars, the longitudinal magnetic field in the primary is rather weak, ranging from 47  to 72 G. The secondary component possesses a variable, much stronger magnetic field, up to 600 G, as expected for a magnetically active T Tauri star. We estimated the rotation period of the primary, Prot = 4.33717 ± 0.00316 d (=104 ± 0.08 h), from metal line equivalent width variations.
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title The two magnetic components in the Herbig Ae SB2 system HD 104237
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