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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/230853
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oai:ri.conicet.gov.ar:11336/230853 |
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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 Técnicas2025-09-29T09:51:23Zoai: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:34982025-09-29 09:51:23.837CONICET 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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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1844613580493684736 |
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13.070432 |