2012
DOI: 10.1051/0004-6361/201220215
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The magnetic field topology of the weak-lined T Tauri star V410 Tauri

Abstract: Aims. In a follow-up investigation we present Zeeman-Doppler maps of the weak-lined T Tauri star (WTTS) V410 Tau. As a rapid rotating star and a typical WTTS the stellar surface of V410 Tau is accessible to surface imaging techniques and allows us to detect and reconstruct the major magnetic surface features on this pre-main sequence star. Methods. The polarized signals we are measuring are on the order of 10 −4 to 10 −3 and are hidden well below the noise level of a single observation. A new line profile reco… Show more

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Cited by 86 publications
(116 citation statements)
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“…We use our Doppler-imaging code iMap (Carroll et al 2007(Carroll et al , 2009) in its latest version described in Carroll et al (2012). Reconstructing a stellar surface from a series of spectral line profiles is an inverse problem that amounts to solving the integral equation relating the surface temperature distribution to the observed line profiles while controlling the effects of noise in the data through a regularizing functional (see, e.g., the review by Rice 2002).…”
Section: Methods and Assumptionsmentioning
confidence: 99%
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“…We use our Doppler-imaging code iMap (Carroll et al 2007(Carroll et al , 2009) in its latest version described in Carroll et al (2012). Reconstructing a stellar surface from a series of spectral line profiles is an inverse problem that amounts to solving the integral equation relating the surface temperature distribution to the observed line profiles while controlling the effects of noise in the data through a regularizing functional (see, e.g., the review by Rice 2002).…”
Section: Methods and Assumptionsmentioning
confidence: 99%
“…Spectral lines at the edges of the échelle orders are either completely removed, or averaged if repeated in two adjacent orders. Although the averaging of many line profiles is computationally more demanding because the same averaging must be done for the synthetic line profiles during the inversion, this process can lead to significantly lower least-squares errors (Carroll et al 2012). Notes.…”
Section: Data Setupmentioning
confidence: 99%
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“…The software package used to study the magnetic fields in this paper, the SVD method for Stokes profile reconstruction, was introduced by Carroll et al (2012). The basic idea of SVD is similar to the principal component analysis (PCA) approach, where the similarity of the individual Stokes V profiles allows one to describe the most coherent and systematic features present in all spectral line profiles as a projection onto a small number of eigenprofiles.…”
Section: Magnetic Field Measurementsmentioning
confidence: 99%
“…The B z values, derived from the HARPSpol spectra, were estimated adopting two techniques: the least-squares deconvolution technique (LSD; Donati et al 1997;Kochukhov et al 2010) and the single value decomposition technique (SVD; Carroll et al 2012). We derived the B z values considering 90 metal lines and ignoring He lines because of their large width and the inhomogeneous surface distribution that biases the magnetic field measurements (see Table 1).…”
Section: The Strong Surface Magnetic Field Of Cpd −62 • 2124mentioning
confidence: 99%