RT Journal Article
T1 Photometric segregation of dwarf and giant FGK stars using the SVO filter profile service and photometric tools
A1 Rodrigo, Carlos
A1 Cruz, Patricia
A1 Aguilar, John F.
A1 Aller, Alba
A1 Solano, Enrique
A1 Gálvez-Ortiz, Maria Cruz
A1 Jiménez-Esteban, Francisco
A1 Mas-Buitrago, Pedro
A1 Bayo, Amelia
A1 Cortés Contreras, Miriam
A1 Murillo-Ojeda, Raquel
A1 Bonoli, Silvia
A1 Cenarro, Javier
A1 Dupke, Renato
A1 López-Sanjuan, Carlos
A1 Marín-Franch, Antonio
A1 de Oliveira, Claudia Mendes
A1 Moles, Mariano
A1 Taylor, Keith
A1 Varela, Jesús
A1 Ramió, Héctor Vázquez
AB Aims. This paper is focused on the segregation of FGK dwarf and giant stars through narrow-band photometric data using the Spanish Virtual Observatory (SVO) Filter Profile Service and associated photometric tools.Methods. We selected spectra from the MILES, STELIB, and ELODIE stellar libraries, and used SVO photometric tools to derive the synthetic photometry in 15 J-PAS narrow filters, which were especially selected to cover spectral features sensitive to gravity changes. Using machine-learning techniques as the Gaussian mixture model and the support vector machine, we defined several criteria based on J-PAS colours to discriminate between dwarf and giant stars.Results. We selected five colour-colour diagrams that presented the most promising separation between both samples. Our results show an overall accuracy in the studied sample of ~0.97 for FGK stars, although a dependence on the luminosity type and the stellar effective temperature was found. We also defined a colour-temperature relation for dwarf stars with effective temperatures between 4 000 and 7 000 K, which allows one to estimate the stellar effective temperature from four J-PAS filters (J0450, J0510, J0550, and J0620). Additionally, we extended the study to M-type giant and dwarf stars, achieving a similar accuracy to that for FGK stars.
PB EDP Sciences
SN 0004-6361
YR 2024
FD 2024
LK https://hdl.handle.net/20.500.14352/123784
UL https://hdl.handle.net/20.500.14352/123784
LA eng
NO Rodrigo, Carlos, et al. «Photometric segregation of dwarf and giant FGK stars using the SVO Filter Profile Service and photometric tools». Astronomy & Astrophysics, vol. 689, septiembre de 2024, p. A93. DOI.org (Crossref), https://doi.org/10.1051/0004-6361/202449998.
NO Comunidad de Madrid
NO Ministerio de Ciencia e Innovación (España)
NO ERDF "A way of making Europe"
NO INTA (España)
NO German Research Foundation (DFG)
NO Universidad Complutense de Madrid (UCM)
NO European Union (EU)
NO Gobierno de España
NO Financiadora de Inovacao e Pesquisa (Finep)
NO Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
NO Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)
NO National Observatory of Brazil
NO Tartu Observatory
NO J-PAS Chinese Astronomical Consortium
NO Ministerio de Economía e Competitividad (España)
DS Docta Complutense
RD 4 may 2026