| Texto completo | |
| Autor(es): |
Koziel-Wierzbowska, D.
[1]
;
Asari, N. Vale
[2, 3]
;
Stasinska, G.
[4]
;
Herpich, F. R.
[5, 3]
;
Sikora, M.
[6]
;
Zywucka, N.
[7]
;
Goyal, A.
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Jagiellonian Univ, Astron Observ, Ul Orla 171, PL-30244 Krakow - Poland
[2] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife - Scotland
[3] Univ Fed Santa Catarina, Dept Fis, CFM, CP 476, BR-88040900 Florianopolis, SC - Brazil
[4] CNRS, PSL, Observ Paris, LUTH, F-92190 Meudon - France
[5] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, BR-05508090 Sao Paulo - Brazil
[6] Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw - Poland
[7] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom - South Africa
Número total de Afiliações: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ASTROPHYSICAL JOURNAL; v. 910, n. 1 MAR 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Basing our analysis on ROGUE I, a catalog of over 32,000 radio sources associated with optical galaxies, we provide two diagnostics to select the galaxies where the radio emission is dominated by an active galactic nucleus (AGN), referred to in the paper as radio-AGNs. Each of these diagnostics can be applied independently. The first one, dubbed MIRAD, compares the flux F-W3 in the W3 mid-infrared band of the Wide-field Infrared Survey Explorer telescope, with the radio flux at 1.4 GHz, F-1.4. MIRAD requires no optical spectra. The second diagnostic, dubbed DLM, compares the 4000 A break strength, D-n(4000), with the radio luminosity per unit stellar mass. The DLM diagram has already been used in the past, but not as stand-alone. For these two diagrams, we propose simple, empirical dividing lines that result in the same classification for the objects in common. These lines correctly classify as radio-AGN 99.5% of the extended radio sources in the ROGUE I catalog, and as star-forming galaxies 98%-99% of the galaxies identified as such by their emission-line ratios. Both diagrams clearly show that radio-AGNs are preferentially found among elliptical galaxies and among galaxies hosting the most massive black holes. Most of the radio sources classified as radio-AGNs in the MIRAD or DLM diagrams are either optically weak AGNs or retired galaxies. (AU) | |
| Processo FAPESP: | 18/21661-9 - Catalogação de Fontes Variáveis e Ciência Tipo IFU em Levantamentos Fotométricos Multibanda. |
| Beneficiário: | Fábio Rafael Herpich |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |