Exploring the photometric variability of ultra-cool dwarfs with TESS

Autores
Petrucci, Romina Paola; Gómez Maqueo Chew, Yilen; Jofre, Jorge Emiliano; Segura, Antígona; Ferrero, Leticia Virginia
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a photometric characterization of 208 ultra-cool dwarfs (UCDs) with spectral types between M4 and L4, from 20-s and 2-min cadence TESS light curves. We determine rotation periods for 87 objects (⁠~42%⁠) and identify 778 flare events in 103 UCDs (⁠~49.5%). For 777 flaring events (corresponding to 102 objects), we derive bolometric energies between 2.1 × 10^30 and 1.1 × 10^34 erg⁠, with 56 superflare events. No transiting planets or eclipsing binaries were identified. We find that the fraction of UCDs with rotation and flaring activity is, at least, 20 per cent higher in M4–M6 spectral types than in later UCDs (M7–L4). For spectral types between M4 and L0, we measure the slope of the flare bolometric energy–duration correlation to be γ = 0.497 ± 0.058, which agrees with that found in previous studies for solar-type and M dwarfs. Moreover, we determine the slope of the flare frequency distribution to be α = −1.75 ± 0.04 for M4–M5 dwarfs, α = −1.69 ± 0.04 and α = −1.72 ± 0.1 for M6–M7 and M8–L0 dwarfs, respectively, which are consistent with previous works that exclusively analysed UCDs. These results support the idea that independently of the physical mechanisms that produce magnetic activity, the characteristics of the rotational modulation and flares are similar for both fully convective UCDs and partially convective solar-type and early-M stars. Based on the measured UCD flare distributions, we find that ultraviolet radiation emitted from flares does not have the potential to start prebiotic chemistry.
Fil: Petrucci, Romina Paola. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Gómez Maqueo Chew, Yilen. Universidad Nacional Autónoma de México; México
Fil: Jofre, Jorge Emiliano. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Segura, Antígona. Universidad Nacional Autónoma de México; México
Fil: Ferrero, Leticia Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Materia
TECHNIQUES: PHOTOMETRIC
PLANETS AND SATELLITES: TERRESTRIAL PLANETS
STARS: FLARE
STARS: LOW-MASS
STARS: ROTATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/230853
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/230853
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Exploring the photometric variability of ultra-cool dwarfs with TESSPetrucci, Romina PaolaGómez Maqueo Chew, YilenJofre, Jorge EmilianoSegura, AntígonaFerrero, Leticia VirginiaTECHNIQUES: PHOTOMETRICPLANETS AND SATELLITES: TERRESTRIAL PLANETSSTARS: FLARESTARS: LOW-MASSSTARS: ROTATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a photometric characterization of 208 ultra-cool dwarfs (UCDs) with spectral types between M4 and L4, from 20-s and 2-min cadence TESS light curves. We determine rotation periods for 87 objects (⁠~42%⁠) and identify 778 flare events in 103 UCDs (⁠~49.5%). For 777 flaring events (corresponding to 102 objects), we derive bolometric energies between 2.1 × 10^30 and 1.1 × 10^34 erg⁠, with 56 superflare events. No transiting planets or eclipsing binaries were identified. We find that the fraction of UCDs with rotation and flaring activity is, at least, 20 per cent higher in M4–M6 spectral types than in later UCDs (M7–L4). For spectral types between M4 and L0, we measure the slope of the flare bolometric energy–duration correlation to be γ = 0.497 ± 0.058, which agrees with that found in previous studies for solar-type and M dwarfs. Moreover, we determine the slope of the flare frequency distribution to be α = −1.75 ± 0.04 for M4–M5 dwarfs, α = −1.69 ± 0.04 and α = −1.72 ± 0.1 for M6–M7 and M8–L0 dwarfs, respectively, which are consistent with previous works that exclusively analysed UCDs. These results support the idea that independently of the physical mechanisms that produce magnetic activity, the characteristics of the rotational modulation and flares are similar for both fully convective UCDs and partially convective solar-type and early-M stars. Based on the measured UCD flare distributions, we find that ultraviolet radiation emitted from flares does not have the potential to start prebiotic chemistry.Fil: Petrucci, Romina Paola. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Gómez Maqueo Chew, Yilen. Universidad Nacional Autónoma de México; MéxicoFil: Jofre, Jorge Emiliano. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Segura, Antígona. Universidad Nacional Autónoma de México; MéxicoFil: Ferrero, Leticia Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaOxford University Press2024-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/230853Petrucci, Romina Paola; Gómez Maqueo Chew, Yilen; Jofre, Jorge Emiliano; Segura, Antígona; Ferrero, Leticia Virginia; Exploring the photometric variability of ultra-cool dwarfs with TESS; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 8290-83041365-2966CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/527/3/8290/7457743info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad3720info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:20:46Zoai:ri.conicet.gov.ar:11336/230853instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:20:46.691CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Exploring the photometric variability of ultra-cool dwarfs with TESS
title Exploring the photometric variability of ultra-cool dwarfs with TESS
spellingShingle Exploring the photometric variability of ultra-cool dwarfs with TESS
Petrucci, Romina Paola
TECHNIQUES: PHOTOMETRIC
PLANETS AND SATELLITES: TERRESTRIAL PLANETS
STARS: FLARE
STARS: LOW-MASS
STARS: ROTATION
title_short Exploring the photometric variability of ultra-cool dwarfs with TESS
title_full Exploring the photometric variability of ultra-cool dwarfs with TESS
title_fullStr Exploring the photometric variability of ultra-cool dwarfs with TESS
title_full_unstemmed Exploring the photometric variability of ultra-cool dwarfs with TESS
title_sort Exploring the photometric variability of ultra-cool dwarfs with TESS
dc.creator.none.fl_str_mv Petrucci, Romina Paola
Gómez Maqueo Chew, Yilen
Jofre, Jorge Emiliano
Segura, Antígona
Ferrero, Leticia Virginia
author Petrucci, Romina Paola
author_facet Petrucci, Romina Paola
Gómez Maqueo Chew, Yilen
Jofre, Jorge Emiliano
Segura, Antígona
Ferrero, Leticia Virginia
author_role author
author2 Gómez Maqueo Chew, Yilen
Jofre, Jorge Emiliano
Segura, Antígona
Ferrero, Leticia Virginia
author2_role author
author
author
author
dc.subject.none.fl_str_mv TECHNIQUES: PHOTOMETRIC
PLANETS AND SATELLITES: TERRESTRIAL PLANETS
STARS: FLARE
STARS: LOW-MASS
STARS: ROTATION
topic TECHNIQUES: PHOTOMETRIC
PLANETS AND SATELLITES: TERRESTRIAL PLANETS
STARS: FLARE
STARS: LOW-MASS
STARS: ROTATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a photometric characterization of 208 ultra-cool dwarfs (UCDs) with spectral types between M4 and L4, from 20-s and 2-min cadence TESS light curves. We determine rotation periods for 87 objects (⁠~42%⁠) and identify 778 flare events in 103 UCDs (⁠~49.5%). For 777 flaring events (corresponding to 102 objects), we derive bolometric energies between 2.1 × 10^30 and 1.1 × 10^34 erg⁠, with 56 superflare events. No transiting planets or eclipsing binaries were identified. We find that the fraction of UCDs with rotation and flaring activity is, at least, 20 per cent higher in M4–M6 spectral types than in later UCDs (M7–L4). For spectral types between M4 and L0, we measure the slope of the flare bolometric energy–duration correlation to be γ = 0.497 ± 0.058, which agrees with that found in previous studies for solar-type and M dwarfs. Moreover, we determine the slope of the flare frequency distribution to be α = −1.75 ± 0.04 for M4–M5 dwarfs, α = −1.69 ± 0.04 and α = −1.72 ± 0.1 for M6–M7 and M8–L0 dwarfs, respectively, which are consistent with previous works that exclusively analysed UCDs. These results support the idea that independently of the physical mechanisms that produce magnetic activity, the characteristics of the rotational modulation and flares are similar for both fully convective UCDs and partially convective solar-type and early-M stars. Based on the measured UCD flare distributions, we find that ultraviolet radiation emitted from flares does not have the potential to start prebiotic chemistry.
Fil: Petrucci, Romina Paola. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Gómez Maqueo Chew, Yilen. Universidad Nacional Autónoma de México; México
Fil: Jofre, Jorge Emiliano. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Segura, Antígona. Universidad Nacional Autónoma de México; México
Fil: Ferrero, Leticia Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
description We present a photometric characterization of 208 ultra-cool dwarfs (UCDs) with spectral types between M4 and L4, from 20-s and 2-min cadence TESS light curves. We determine rotation periods for 87 objects (⁠~42%⁠) and identify 778 flare events in 103 UCDs (⁠~49.5%). For 777 flaring events (corresponding to 102 objects), we derive bolometric energies between 2.1 × 10^30 and 1.1 × 10^34 erg⁠, with 56 superflare events. No transiting planets or eclipsing binaries were identified. We find that the fraction of UCDs with rotation and flaring activity is, at least, 20 per cent higher in M4–M6 spectral types than in later UCDs (M7–L4). For spectral types between M4 and L0, we measure the slope of the flare bolometric energy–duration correlation to be γ = 0.497 ± 0.058, which agrees with that found in previous studies for solar-type and M dwarfs. Moreover, we determine the slope of the flare frequency distribution to be α = −1.75 ± 0.04 for M4–M5 dwarfs, α = −1.69 ± 0.04 and α = −1.72 ± 0.1 for M6–M7 and M8–L0 dwarfs, respectively, which are consistent with previous works that exclusively analysed UCDs. These results support the idea that independently of the physical mechanisms that produce magnetic activity, the characteristics of the rotational modulation and flares are similar for both fully convective UCDs and partially convective solar-type and early-M stars. Based on the measured UCD flare distributions, we find that ultraviolet radiation emitted from flares does not have the potential to start prebiotic chemistry.
publishDate 2024
dc.date.none.fl_str_mv 2024-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/230853
Petrucci, Romina Paola; Gómez Maqueo Chew, Yilen; Jofre, Jorge Emiliano; Segura, Antígona; Ferrero, Leticia Virginia; Exploring the photometric variability of ultra-cool dwarfs with TESS; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 8290-8304
1365-2966
CONICET Digital
CONICET
url http://hdl.handle.net/11336/230853
identifier_str_mv Petrucci, Romina Paola; Gómez Maqueo Chew, Yilen; Jofre, Jorge Emiliano; Segura, Antígona; Ferrero, Leticia Virginia; Exploring the photometric variability of ultra-cool dwarfs with TESS; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 8290-8304
1365-2966
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/527/3/8290/7457743
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad3720
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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