The CARMENES search for exoplanets around M dwarfs: Cluster analysis of signals from spectral activity indicators to search for shared periods

[Context] A multitude of spectral activity indicators are routinely computed nowadays from the spectra generated as part of planet-hunting radial velocity surveys. Searching for shared periods among them can help to robustly identify astrophysical quantities of interest, such as the stellar rotation...

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Detalhes bibliográficos
Autores: Kemmer, J., Lafarga, M., Fuhrmeister, Birgit, Shan, Y., Schöfer, P., Jeffers, Sandra V., Caballero, J. A., Quirrenbach, Andreas, Amado, Pedro J., Reiners, Ansgar, Ribas, Ignasi, Béjar, Victor J. S., Sordo, Fabio del, Hatzes, Artie P., Henning, Thomas, Hermelo, I., Kaminski, Adrian, Montes, David, Morales, Juan Carlos, Reffert, S.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/400333
Acesso em linha:http://hdl.handle.net/10261/400333
https://api.elsevier.com/content/abstract/scopus_id/105006534871
Access Level:acceso abierto
Palavra-chave:Stars: activity
Stars: late-type
Stars: low-mass
Stars: rotation
Techniques: radial velocities
Descrição
Resumo:[Context] A multitude of spectral activity indicators are routinely computed nowadays from the spectra generated as part of planet-hunting radial velocity surveys. Searching for shared periods among them can help to robustly identify astrophysical quantities of interest, such as the stellar rotation period. However, this identification can be complicated due to the fact that many different peaks occur in the periodograms. This is especially true in the presence of aliasing and spurious signals caused by environmental influences affecting the instrument.

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