F. Massaro, E. J. Marchesini, R. D'Abrusco, N. Masetti, I. Andruchow, Howard A. Smith

Resultado de la investigación: Contribución a una revistaArtículo

14 Citas (Scopus)


The existence of "radio-weak BL Lac objects" (RWBLs) has been an open question, and has remained unsolved since the discovery that quasars could be radio-quiet or radio-loud. Recently, several groups identified RWBL candidates, mostly found while searching for low-energy counterparts of the unidentified or unassociated gamma-ray sources listed in the Fermi catalogs. Confirming RWBLs is a challenging task since they could be confused with white dwarfs (WDs) or weak emission line quasars (WELQs) when there are not sufficient data to precisely draw their broadband spectral energy distribution, and their classification is mainly based on a featureless optical spectra. Motivated by the recent discovery that Fermi BL Lacs appear to have very peculiar mid-IR emission, we show that it is possible to distinguish between WDs, WELQs, and BL Lacs using the [3.4]-[4.6]-[12] μm color-color plot built using the WISE magnitudes when the optical spectrum is available. On the basis of this analysis, we identify WISE J064459.38+603131 and WISE J141046.00+740511.2 as the first two genuine RWBLs, both potentially associated with Fermi sources. Finally, to strengthen our identification of these objects as true RWBLs, we present multifrequency observations for these two candidates to show that their spectral behavior is indeed consistent with that of the BL Lac population.

Idioma originalInglés
Número de artículo113
PublicaciónAstrophysical Journal
EstadoPublicada - 10 ene 2017
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

Huella Profundice en los temas de investigación de 'RADIO-WEAK BL LAC OBJECTS in the FERMI ERA'. En conjunto forman una huella única.

  • Citar esto

    Massaro, F., Marchesini, E. J., D'Abrusco, R., Masetti, N., Andruchow, I., & Smith, H. A. (2017). RADIO-WEAK BL LAC OBJECTS in the FERMI ERA. Astrophysical Journal, 834(2), [113].