The latitude distribution of star-spots on He 699

S V  Jeffers; J R  Barnes; A  Collier Cameron

doi:10.1046/j.1365-8711.2002.05143.x

The latitude distribution of star-spots on He 699

S V Jeffers, J R Barnes, A Collier Cameron

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18 Citations (Scopus)

Abstract

In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.

Original language	English
Pages (from-to)	666-672
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	331
Issue number	3
DOIs	https://doi.org/10.1046/j.1365-8711.2002.05143.x
Publication status	Published - 11 Apr 2002

Keywords

methods : data analysis
stars : activity
stars : imaging
stars : individual : He 699
stars : late-type
stars : spots
ALPHA-PERSEI CLUSTER
LOW-MASS STARS
ROTATIONAL VELOCITIES
MAIN-SEQUENCE
G-DWARFS
EVOLUTION
ALGORITHM
PLEIADES
IMAGES

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10.1046/j.1365-8711.2002.05143.x

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title = "The latitude distribution of star-spots on He 699",

abstract = "In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.",

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author = "Jeffers, {S V} and Barnes, {J R} and {Collier Cameron}, A",

year = "2002",

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day = "11",

doi = "10.1046/j.1365-8711.2002.05143.x",

language = "English",

volume = "331",

pages = "666--672",

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

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

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}

TY - JOUR

T1 - The latitude distribution of star-spots on He 699

AU - Jeffers, S V

AU - Barnes, J R

AU - Collier Cameron, A

PY - 2002/4/11

Y1 - 2002/4/11

N2 - In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.

AB - In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699, An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al.. and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.

KW - methods : data analysis

KW - stars : activity

KW - stars : imaging

KW - stars : individual : He 699

KW - stars : late-type

KW - stars : spots

KW - ALPHA-PERSEI CLUSTER

KW - LOW-MASS STARS

KW - ROTATIONAL VELOCITIES

KW - MAIN-SEQUENCE

KW - G-DWARFS

KW - EVOLUTION

KW - ALGORITHM

KW - PLEIADES

KW - IMAGES

U2 - 10.1046/j.1365-8711.2002.05143.x

DO - 10.1046/j.1365-8711.2002.05143.x

M3 - Article

SN - 0035-8711

VL - 331

SP - 666

EP - 672

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The latitude distribution of star-spots on He 699

Abstract

Keywords

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