Multisite observations of SU Aurigae

Y C  Unruh; J F  Donati; J M  Oliveira; A C  Cameron; C  Catala; H F  Henrichs; C M  Johns-Krull; B  Foing; J  Hao; H  Cao; J D  Landstreet; H C  Stempels; J A  de Jong; J  Telting; N  Walton; P  Ehrenfreund; A P  Hatzes; J E  Neff; T  Bohm; T  Simon; L  Kaper; K G  Strassmeier; T  Granzer

doi:10.1111/j.1365-2966.2004.07445.x

Multisite observations of SU Aurigae

Y C Unruh, J F Donati, J M Oliveira, A C Cameron, C Catala, H F Henrichs, C M Johns-Krull, B Foing, J Hao, H Cao, J D Landstreet, H C Stempels, J A de Jong, J Telting, N Walton, P Ehrenfreund, A P Hatzes, J E Neff, T Bohm, T SimonL Kaper, K G Strassmeier, T Granzer

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present results from the 1996 Multi-Site Continuous Spectroscopy (MUSICOS) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line, and somewhat longer, less well-pronounced periodicities in the Balmer lines and in Na D. Our observations support the suggestion that the wind and infall signatures are out of phase on SU Aur. We present Doppler images of SU Aur that have been obtained from least-squares deconvolved profiles. Images taken about one rotation apart show only limited overlap, in particular at low latitudes. This is due in part to limitations in signal-to-noise ratio, and in part to line-profile deformations that arise from short-lived and/or non-surface features. The agreement at high latitudes is better and suggests that at least some longer-lived features are present. The analysis of Stokes V profiles yields a marginal magnetic field detection during one of the phases.

Original language	English
Pages (from-to)	1301-1320
Number of pages	20
Journal	Monthly Notices of the Royal Astronomical Society
Volume	348
DOIs	https://doi.org/10.1111/j.1365-2966.2004.07445.x
Publication status	Published - 11 Mar 2004

Keywords

stars : imaging
stars : individual : SU Aur
stars : magnetic fields
stars : pre-main-sequence
T-TAURI STARS
MAIN-SEQUENCE STARS
TIME-SERIES ANALYSIS
HERBIG AE/BE STARS
STELLAR SURFACE-STRUCTURE
HAMILTON ECHELLE SPECTRA
LINE-PROFILE VARIABILITY
BETA-PICTORIS PHENOMENON
MAGNETIC-FIELD STRENGTH
YOUNG STARS

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10.1111/j.1365-2966.2004.07445.x

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Unruh, Y. C., Donati, J. F., Oliveira, J. M., Cameron, A. C., Catala, C., Henrichs, H. F., Johns-Krull, C. M., Foing, B., Hao, J., Cao, H., Landstreet, J. D., Stempels, H. C., de Jong, J. A., Telting, J., Walton, N., Ehrenfreund, P., Hatzes, A. P., Neff, J. E., Bohm, T., ... Granzer, T. (2004). Multisite observations of SU Aurigae. Monthly Notices of the Royal Astronomical Society, 348, 1301-1320. https://doi.org/10.1111/j.1365-2966.2004.07445.x

@article{58bddc31ee444a28b9035bd3fb1816b9,

title = "Multisite observations of SU Aurigae",

abstract = "We present results from the 1996 Multi-Site Continuous Spectroscopy (MUSICOS) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line, and somewhat longer, less well-pronounced periodicities in the Balmer lines and in Na D. Our observations support the suggestion that the wind and infall signatures are out of phase on SU Aur. We present Doppler images of SU Aur that have been obtained from least-squares deconvolved profiles. Images taken about one rotation apart show only limited overlap, in particular at low latitudes. This is due in part to limitations in signal-to-noise ratio, and in part to line-profile deformations that arise from short-lived and/or non-surface features. The agreement at high latitudes is better and suggests that at least some longer-lived features are present. The analysis of Stokes V profiles yields a marginal magnetic field detection during one of the phases.",

keywords = "stars : imaging, stars : individual : SU Aur, stars : magnetic fields, stars : pre-main-sequence, T-TAURI STARS, MAIN-SEQUENCE STARS, TIME-SERIES ANALYSIS, HERBIG AE/BE STARS, STELLAR SURFACE-STRUCTURE, HAMILTON ECHELLE SPECTRA, LINE-PROFILE VARIABILITY, BETA-PICTORIS PHENOMENON, MAGNETIC-FIELD STRENGTH, YOUNG STARS",

author = "Unruh, {Y C} and Donati, {J F} and Oliveira, {J M} and Cameron, {A C} and C Catala and Henrichs, {H F} and Johns-Krull, {C M} and B Foing and J Hao and H Cao and Landstreet, {J D} and Stempels, {H C} and {de Jong}, {J A} and J Telting and N Walton and P Ehrenfreund and Hatzes, {A P} and Neff, {J E} and T Bohm and T Simon and L Kaper and Strassmeier, {K G} and T Granzer",

year = "2004",

month = mar,

day = "11",

doi = "10.1111/j.1365-2966.2004.07445.x",

language = "English",

volume = "348",

pages = "1301--1320",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Unruh, YC, Donati, JF, Oliveira, JM, Cameron, AC, Catala, C, Henrichs, HF, Johns-Krull, CM, Foing, B, Hao, J, Cao, H, Landstreet, JD, Stempels, HC, de Jong, JA, Telting, J, Walton, N, Ehrenfreund, P, Hatzes, AP, Neff, JE, Bohm, T, Simon, T, Kaper, L, Strassmeier, KG & Granzer, T 2004, 'Multisite observations of SU Aurigae', Monthly Notices of the Royal Astronomical Society, vol. 348, pp. 1301-1320. https://doi.org/10.1111/j.1365-2966.2004.07445.x

TY - JOUR

T1 - Multisite observations of SU Aurigae

AU - Unruh, Y C

AU - Donati, J F

AU - Oliveira, J M

AU - Cameron, A C

AU - Catala, C

AU - Henrichs, H F

AU - Johns-Krull, C M

AU - Foing, B

AU - Hao, J

AU - Cao, H

AU - Landstreet, J D

AU - Stempels, H C

AU - de Jong, J A

AU - Telting, J

AU - Walton, N

AU - Ehrenfreund, P

AU - Hatzes, A P

AU - Neff, J E

AU - Bohm, T

AU - Simon, T

AU - Kaper, L

AU - Strassmeier, K G

AU - Granzer, T

PY - 2004/3/11

Y1 - 2004/3/11

N2 - We present results from the 1996 Multi-Site Continuous Spectroscopy (MUSICOS) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line, and somewhat longer, less well-pronounced periodicities in the Balmer lines and in Na D. Our observations support the suggestion that the wind and infall signatures are out of phase on SU Aur. We present Doppler images of SU Aur that have been obtained from least-squares deconvolved profiles. Images taken about one rotation apart show only limited overlap, in particular at low latitudes. This is due in part to limitations in signal-to-noise ratio, and in part to line-profile deformations that arise from short-lived and/or non-surface features. The agreement at high latitudes is better and suggests that at least some longer-lived features are present. The analysis of Stokes V profiles yields a marginal magnetic field detection during one of the phases.

AB - We present results from the 1996 Multi-Site Continuous Spectroscopy (MUSICOS) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line, and somewhat longer, less well-pronounced periodicities in the Balmer lines and in Na D. Our observations support the suggestion that the wind and infall signatures are out of phase on SU Aur. We present Doppler images of SU Aur that have been obtained from least-squares deconvolved profiles. Images taken about one rotation apart show only limited overlap, in particular at low latitudes. This is due in part to limitations in signal-to-noise ratio, and in part to line-profile deformations that arise from short-lived and/or non-surface features. The agreement at high latitudes is better and suggests that at least some longer-lived features are present. The analysis of Stokes V profiles yields a marginal magnetic field detection during one of the phases.

KW - stars : imaging

KW - stars : individual : SU Aur

KW - stars : magnetic fields

KW - stars : pre-main-sequence

KW - T-TAURI STARS

KW - MAIN-SEQUENCE STARS

KW - TIME-SERIES ANALYSIS

KW - HERBIG AE/BE STARS

KW - STELLAR SURFACE-STRUCTURE

KW - HAMILTON ECHELLE SPECTRA

KW - LINE-PROFILE VARIABILITY

KW - BETA-PICTORIS PHENOMENON

KW - MAGNETIC-FIELD STRENGTH

KW - YOUNG STARS

UR - http://www.scopus.com/inward/record.url?scp=1642390685&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2004.07445.x

DO - 10.1111/j.1365-2966.2004.07445.x

M3 - Article

SN - 0035-8711

VL - 348

SP - 1301

EP - 1320

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -

Multisite observations of SU Aurigae

Abstract

Keywords

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