Time evolution of magnetic activity cycles in young suns: The curious case of kappa Ceti

Autor: Evelyne Alecian, C. P. Folsom, Julien Morin, Pascal Petit, Stephen C. Marsden, V. Perdelwitz, M. Mittag, Manuel Guedel, A. Antonova, M. Schmid, Aline A. Vidotto, T. Lüftinger, Y. T. Metodieva, S. Boro Saikia, Sandra V. Jeffers, Jeffrey C. Hall, J.-F. Donati, Oleg Kochukhov

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 658, pp.A16. ⟨10.1051/0004-6361/202141525⟩
Astronomy and Astrophysics
Astronomy & Astrophysics, 658:A16
Astronomy and Astrophysics-A&A, EDP Sciences, In press
HAL

A detailed investigation of the magnetic properties of young Sun-like stars can provide valuable information on our Sun's magnetic past and its impact on the early Earth. We determine the properties of the moderately rotating young Sun-like star kapp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8c1e55569375aabd38dd0344a18d892
https://hal.science/hal-03428844/file/2110.06000.pdf

An X-ray activity cycle on the young solar-like star ? Eridani

Autor: Beate Stelzer, Peter Schneider, Travis S. Metcalfe, Salvatore Orlando, Jorge Sanz-Forcada, M. Mittag, U. Wolter, Jeffrey C. Hall, M. Coffaro, Lorenzo Ducci

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
Instituto Nacional de Técnica Aeroespacial (INTA)

Chromospheric Ca II activity cycles are frequently found in late-type stars, but no systematic programs have been created to search for their coronal X-ray counterparts. The typical time scale of Ca II activity cycles ranges from years to decades. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::655cdf88516f118c941d7215ef6cc0b4
http://hdl.handle.net/10261/233689

Evolution of Long Term Variability in Solar Analogs

Autor: S. L. Baliunas, Ricky Egeland, Jeffrey C. Hall, Willie Soon, Gregory W. Henry

Earth is the only planet known to harbor life, therefore we may speculate on how the nature of the Sun-Earth interaction is relevant to life on Earth, and how the behavior of other stars may influence the development of life on their planetary system

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f054b0db786aa9b1380d46f7fd4f36e
http://arxiv.org/abs/1704.02388

A solar-like magnetic cycle on the mature K-dwarf 61 Cyg A (HD 201091)

Autor: C. P. Folsom, Jeffrey C. Hall, Robert H. Cameron, Ansgar Reiners, Sandra V. Jeffers, Stephen C. Marsden, Aline A. Vidotto, Julien Morin, Pascal Petit, J.-F. Donati, S. Boro Saikia, V. Perdelwitz

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2016, 594, pp.A29. ⟨10.1051/0004-6361/201628262⟩
NASA Astrophysics Data System

International audience; The long-term monitoring of magnetic cycles in cool stars is a key diagnostic in understanding how dynamo generation and amplification of magnetic fields occur in stars similar in structure to the Sun. We investigate the tempo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db503b19c75b2dd155c53a01bf1bedb2
https://hal.archives-ouvertes.fr/hal-01529718

THE ACTIVITY AND VARIABILITY OF THE SUN AND SUN-LIKE STARS. II. CONTEMPORANEOUS PHOTOMETRY AND SPECTROSCOPY OF BRIGHT SOLAR ANALOGS

Autor: Jeffrey C. Hall, Gregory W. Henry, G. Wesley Lockwood, Steven H. Saar, Brian Skiff

Publikováno v: The Astronomical Journal. 138:312-322

We present 14 years of contemporaneous photometric and spectroscopic observations of 28 solar analog stars, taken with the Tennessee State University Automatic Photometric Telescopes at Fairborn Observatory and the Solar-Stellar Spectrograph at Lowel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f8329aafb9a200a4e1ebf477b2791b8
https://doi.org/10.1088/0004-6256/138/1/312