A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties
Various surveys focusing on the magnetic properties of intermediate-mass main sequence (MS) stars have been previously carried out. One particularly puzzling outcome of these surveys is the identification of a dichotomy between the strong ($\gtrsim100\,{\rm G}$), organized fields hosted by magnetic...
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ftdatacite:10.48550/arxiv.1811.05635 2023-05-15T18:50:49+02:00 A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties Sikora, J. Wade, G. A. Power, J. Neiner, C. 2018 https://dx.doi.org/10.48550/arxiv.1811.05635 https://arxiv.org/abs/1811.05635 unknown arXiv https://dx.doi.org/10.1093/mnras/sty2895 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences article-journal Article ScholarlyArticle Text 2018 ftdatacite https://doi.org/10.48550/arxiv.1811.05635 https://doi.org/10.1093/mnras/sty2895 2022-04-01T08:46:59Z Various surveys focusing on the magnetic properties of intermediate-mass main sequence (MS) stars have been previously carried out. One particularly puzzling outcome of these surveys is the identification of a dichotomy between the strong ($\gtrsim100\,{\rm G}$), organized fields hosted by magnetic chemically peculiar (mCP) stars and the ultra-weak ($\lesssim1\,{\rm G}$) fields associated with a small number of non-mCP MS stars. Despite attempts to detect intermediate strength fields (i.e. those with strengths $\gtrsim10\,{\rm G}$ and $\lesssim100\,{\rm G}$), remarkably few examples have been found. Whether this so-called "magnetic desert", separating the stars hosting ultra-weak fields from the mCP stars truly exists has not been definitively answered. In 2007, a volume-limited spectropolarimetric survey of mCP stars using the MuSiCoS spectropolarimeter was initiated to test the existence of the magnetic desert by attempting to reduce the biases inherent in previous surveys. Since then, we have obtained a large number of ESPaDOnS and NARVAL Stokes $V$ measurements allowing this survey to be completed. Here we present the results of our homogeneous analysis of the rotational periods (inferred from photometric and magnetic variability) and magnetic properties (dipole field strengths and obliquity angles) of the 52 confirmed mCP stars located within a heliocentric distance of $100\,{\rm pc}$. No mCP stars exhibiting field strengths $\lesssim300\,{\rm G}$ are found within the sample, which is consistent with the notion that the magnetic desert is a real property and not the result of an observational bias. Additionally, we find evidence of magnetic field decay, which confirms the results of previous studies. : 34 pages, 23 figures. Accepted for publication in MNRAS Text narval narval DataCite Metadata Store (German National Library of Science and Technology) |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Sikora, J. Wade, G. A. Power, J. Neiner, C. A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
topic_facet |
Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
description |
Various surveys focusing on the magnetic properties of intermediate-mass main sequence (MS) stars have been previously carried out. One particularly puzzling outcome of these surveys is the identification of a dichotomy between the strong ($\gtrsim100\,{\rm G}$), organized fields hosted by magnetic chemically peculiar (mCP) stars and the ultra-weak ($\lesssim1\,{\rm G}$) fields associated with a small number of non-mCP MS stars. Despite attempts to detect intermediate strength fields (i.e. those with strengths $\gtrsim10\,{\rm G}$ and $\lesssim100\,{\rm G}$), remarkably few examples have been found. Whether this so-called "magnetic desert", separating the stars hosting ultra-weak fields from the mCP stars truly exists has not been definitively answered. In 2007, a volume-limited spectropolarimetric survey of mCP stars using the MuSiCoS spectropolarimeter was initiated to test the existence of the magnetic desert by attempting to reduce the biases inherent in previous surveys. Since then, we have obtained a large number of ESPaDOnS and NARVAL Stokes $V$ measurements allowing this survey to be completed. Here we present the results of our homogeneous analysis of the rotational periods (inferred from photometric and magnetic variability) and magnetic properties (dipole field strengths and obliquity angles) of the 52 confirmed mCP stars located within a heliocentric distance of $100\,{\rm pc}$. No mCP stars exhibiting field strengths $\lesssim300\,{\rm G}$ are found within the sample, which is consistent with the notion that the magnetic desert is a real property and not the result of an observational bias. Additionally, we find evidence of magnetic field decay, which confirms the results of previous studies. : 34 pages, 23 figures. Accepted for publication in MNRAS |
format |
Text |
author |
Sikora, J. Wade, G. A. Power, J. Neiner, C. |
author_facet |
Sikora, J. Wade, G. A. Power, J. Neiner, C. |
author_sort |
Sikora, J. |
title |
A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
title_short |
A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
title_full |
A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
title_fullStr |
A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
title_full_unstemmed |
A Volume Limited Survey of mCP Stars Within 100pc II: Rotational and Magnetic Properties |
title_sort |
volume limited survey of mcp stars within 100pc ii: rotational and magnetic properties |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1811.05635 https://arxiv.org/abs/1811.05635 |
genre |
narval narval |
genre_facet |
narval narval |
op_relation |
https://dx.doi.org/10.1093/mnras/sty2895 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1811.05635 https://doi.org/10.1093/mnras/sty2895 |
_version_ |
1766244579070181376 |