The solar benchmark: Rotational modulation of the Sun reconstructed from archival sunspot records

Brett M. Morris; James R.A. Davenport; Helen A.C. Giles; Leslie Hebb; Suzanne L. Hawley; Ruth Angus; Peter A. Gilman; Eric Agol

doi:10.1093/mnras/stz199

The solar benchmark: Rotational modulation of the Sun reconstructed from archival sunspot records

Brett M. Morris
, James R.A. Davenport
, Helen A.C. Giles
, Leslie Hebb
, Suzanne L. Hawley
, Ruth Angus
, Peter A. Gilman
, Eric Agol

University of Washington
University of Geneva
Hobart and William Smith Colleges
American Museum of Natural History
National Center for Atmospheric Research

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

10 Scopus citations

Abstract

We use archival daily spot coverage measurements from Howard et al. to study the rotational modulation of the Sun as though it were a distant star. A quasi-periodic Gaussian process measures the solar rotation period P_rot = 26.3 ± 0.1 d, and activity cycle period P_cyc = 10.7 ± 0.3 yr. We attempt to search for evidence of differential rotation in variations of the apparent rotation period throughout the activity cycle and do not detect a clear signal of differential rotation, consistent with the null results of the hare-and-hounds exercise of Aigrain et al. The full reconstructed solar light curve is available online.

Original language	English
Pages (from-to)	3244-3250
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	484
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stz199
State	Published - Apr 11 2019
Externally published	Yes

Keywords

Stars: activity
Sun: activity
Sun: rotation
Sunspots

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10.1093/mnras/stz199

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title = "The solar benchmark: Rotational modulation of the Sun reconstructed from archival sunspot records",

abstract = "We use archival daily spot coverage measurements from Howard et al. to study the rotational modulation of the Sun as though it were a distant star. A quasi-periodic Gaussian process measures the solar rotation period Prot = 26.3 ± 0.1 d, and activity cycle period Pcyc = 10.7 ± 0.3 yr. We attempt to search for evidence of differential rotation in variations of the apparent rotation period throughout the activity cycle and do not detect a clear signal of differential rotation, consistent with the null results of the hare-and-hounds exercise of Aigrain et al. The full reconstructed solar light curve is available online.",

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doi = "10.1093/mnras/stz199",

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T1 - The solar benchmark

T2 - Rotational modulation of the Sun reconstructed from archival sunspot records

AU - Morris, Brett M.

AU - Davenport, James R.A.

AU - Giles, Helen A.C.

AU - Hebb, Leslie

AU - Hawley, Suzanne L.

AU - Angus, Ruth

AU - Gilman, Peter A.

AU - Agol, Eric

PY - 2019/4/11

Y1 - 2019/4/11

N2 - We use archival daily spot coverage measurements from Howard et al. to study the rotational modulation of the Sun as though it were a distant star. A quasi-periodic Gaussian process measures the solar rotation period Prot = 26.3 ± 0.1 d, and activity cycle period Pcyc = 10.7 ± 0.3 yr. We attempt to search for evidence of differential rotation in variations of the apparent rotation period throughout the activity cycle and do not detect a clear signal of differential rotation, consistent with the null results of the hare-and-hounds exercise of Aigrain et al. The full reconstructed solar light curve is available online.

AB - We use archival daily spot coverage measurements from Howard et al. to study the rotational modulation of the Sun as though it were a distant star. A quasi-periodic Gaussian process measures the solar rotation period Prot = 26.3 ± 0.1 d, and activity cycle period Pcyc = 10.7 ± 0.3 yr. We attempt to search for evidence of differential rotation in variations of the apparent rotation period throughout the activity cycle and do not detect a clear signal of differential rotation, consistent with the null results of the hare-and-hounds exercise of Aigrain et al. The full reconstructed solar light curve is available online.

KW - Stars: activity

KW - Sun: activity

KW - Sun: rotation

KW - Sunspots

UR - https://www.scopus.com/pages/publications/85067051700

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DO - 10.1093/mnras/stz199

M3 - Article

AN - SCOPUS:85067051700

SN - 0035-8711

VL - 484

SP - 3244

EP - 3250

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The solar benchmark: Rotational modulation of the Sun reconstructed from archival sunspot records

Abstract

Keywords

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