Comparisons of images derived from independent Zeeman Doppler imaging codes

G A J  Hussain; J F  Donati; A  Collier Cameron; J R  Barnes

doi:10.1046/j.1365-8711.2000.03573.x

Comparisons of images derived from independent Zeeman Doppler imaging codes

G A J Hussain, J F Donati, A Collier Cameron, J R Barnes

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

34 Citations (Scopus)

Abstract

We compare surface brightness and magnetic field surface maps for the K0 dwarf AB Doradus, obtained using two independently developed Zeeman Doppler imaging codes. We find that even the fine structure in the two sets of images shows excellent agreement. Magnetic field maps appear to be less sensitive to line-modelling effects than brightness maps. We argue that these results point to the consistency and reliability of Doppler imaging techniques even when using poorly sampled data sets, provided that the spectra used are of sufficiently high signal-to-noise ratio.

Original language	English
Pages (from-to)	961-973
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	318
Issue number	4
DOIs	https://doi.org/10.1046/j.1365-8711.2000.03573.x
Publication status	Published - 11 Nov 2000

Keywords

polarization
stars : activity
stars : imaging
stars : individual : HD 36705
stars : late-type
stars : magnetic fields
CLEAN-LIKE APPROACH
AB DORADUS
ACTIVE STARS
RECONSTRUCTION
SENSITIVITY
HD-26337
LINE

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10.1046/j.1365-8711.2000.03573.x

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title = "Comparisons of images derived from independent Zeeman Doppler imaging codes",

abstract = "We compare surface brightness and magnetic field surface maps for the K0 dwarf AB Doradus, obtained using two independently developed Zeeman Doppler imaging codes. We find that even the fine structure in the two sets of images shows excellent agreement. Magnetic field maps appear to be less sensitive to line-modelling effects than brightness maps. We argue that these results point to the consistency and reliability of Doppler imaging techniques even when using poorly sampled data sets, provided that the spectra used are of sufficiently high signal-to-noise ratio.",

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author = "Hussain, {G A J} and Donati, {J F} and {Collier Cameron}, A and Barnes, {J R}",

year = "2000",

month = nov,

day = "11",

doi = "10.1046/j.1365-8711.2000.03573.x",

language = "English",

volume = "318",

pages = "961--973",

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

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

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}

TY - JOUR

T1 - Comparisons of images derived from independent Zeeman Doppler imaging codes

AU - Hussain, G A J

AU - Donati, J F

AU - Collier Cameron, A

AU - Barnes, J R

PY - 2000/11/11

Y1 - 2000/11/11

N2 - We compare surface brightness and magnetic field surface maps for the K0 dwarf AB Doradus, obtained using two independently developed Zeeman Doppler imaging codes. We find that even the fine structure in the two sets of images shows excellent agreement. Magnetic field maps appear to be less sensitive to line-modelling effects than brightness maps. We argue that these results point to the consistency and reliability of Doppler imaging techniques even when using poorly sampled data sets, provided that the spectra used are of sufficiently high signal-to-noise ratio.

AB - We compare surface brightness and magnetic field surface maps for the K0 dwarf AB Doradus, obtained using two independently developed Zeeman Doppler imaging codes. We find that even the fine structure in the two sets of images shows excellent agreement. Magnetic field maps appear to be less sensitive to line-modelling effects than brightness maps. We argue that these results point to the consistency and reliability of Doppler imaging techniques even when using poorly sampled data sets, provided that the spectra used are of sufficiently high signal-to-noise ratio.

KW - polarization

KW - stars : activity

KW - stars : imaging

KW - stars : individual : HD 36705

KW - stars : late-type

KW - stars : magnetic fields

KW - CLEAN-LIKE APPROACH

KW - AB DORADUS

KW - ACTIVE STARS

KW - RECONSTRUCTION

KW - SENSITIVITY

KW - HD-26337

KW - LINE

U2 - 10.1046/j.1365-8711.2000.03573.x

DO - 10.1046/j.1365-8711.2000.03573.x

M3 - Article

SN - 0035-8711

VL - 318

SP - 961

EP - 973

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Comparisons of images derived from independent Zeeman Doppler imaging codes

Abstract

Keywords

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