Radio weak BL Lac objects in the Fermi era
The existence of “radio weak BL Lac objects” (RWBLs) has been an open question, still 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/ unass...
Guardado en:
| Autores principales: | , , , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/82198 |
| Aporte de: |
| id |
I19-R120-10915-82198 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas galaxies: active galaxies: BL Lacertae objects quasars: emission lines quasars: general radiation mechanisms: non-thermal |
| spellingShingle |
Ciencias Astronómicas galaxies: active galaxies: BL Lacertae objects quasars: emission lines quasars: general radiation mechanisms: non-thermal Massaro, F. Marchesini, Ezequiel Joaquín D’Abrusco, R. Masetti, N. Andruchow, Ileana Smith, Howard A. Radio weak BL Lac objects in the Fermi era |
| topic_facet |
Ciencias Astronómicas galaxies: active galaxies: BL Lacertae objects quasars: emission lines quasars: general radiation mechanisms: non-thermal |
| description |
The existence of “radio weak BL Lac objects” (RWBLs) has been an open question, still 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/ unassociated gamma-ray sources listed in the Fermi catalogs. Confirming RWBLs is a challenging task since they could be confused with white dwarfs or weak emission line quasars when there are not sufficient data to precisely draw their broad band 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 those of the BL Lac population. |
| format |
Articulo Preprint |
| author |
Massaro, F. Marchesini, Ezequiel Joaquín D’Abrusco, R. Masetti, N. Andruchow, Ileana Smith, Howard A. |
| author_facet |
Massaro, F. Marchesini, Ezequiel Joaquín D’Abrusco, R. Masetti, N. Andruchow, Ileana Smith, Howard A. |
| author_sort |
Massaro, F. |
| title |
Radio weak BL Lac objects in the Fermi era |
| title_short |
Radio weak BL Lac objects in the Fermi era |
| title_full |
Radio weak BL Lac objects in the Fermi era |
| title_fullStr |
Radio weak BL Lac objects in the Fermi era |
| title_full_unstemmed |
Radio weak BL Lac objects in the Fermi era |
| title_sort |
radio weak bl lac objects in the fermi era |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/82198 |
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AT massarof radioweakbllacobjectsinthefermiera AT marchesiniezequieljoaquin radioweakbllacobjectsinthefermiera AT dabruscor radioweakbllacobjectsinthefermiera AT masettin radioweakbllacobjectsinthefermiera AT andruchowileana radioweakbllacobjectsinthefermiera AT smithhowarda radioweakbllacobjectsinthefermiera |
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Repositorios |
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