|
Título:
|
The first gamma-ray emitting BL lacertae object at the cosmic dawn
|
|
Autores:
|
Paliya, Vaidehi S. ;
Dominguez, A. ;
Cabello, C. ;
Cardiel López, Nicolás ;
Gallego Maestro, Jesús ;
Siana, Brian ;
Ajello, M. ;
Hartmann, D. ;
Gil de Paz, Armando ;
Stalin, C.S.
|
|
Tipo de documento:
|
texto impreso
|
|
Editorial:
|
IOP Publishing, 2020-11
|
|
Dimensiones:
|
application/pdf
|
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
|
Idiomas:
|
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física: Astrofísica
,
Materia = Ciencias: Física: Astronomía
,
Tipo = Artículo
|
|
Resumen:
|
One of the major challenges in studying the cosmic evolution of relativistic jets is the identification of the high-redshift (z > 3) BL Lacertae objects, a class of jetted active galactic nuclei characterized by their quasi-featureless optical spectra. Here we report the identification of the first ?-ray emitting BL Lac object, 4FGL J1219.0+3653 (J1219), beyond z = 3, i.e., within the first two billion years of the age of the Universe. The optical and near-infrared spectra of J1219 taken from 10.4 m Gran Telescopio Canarias exhibit no emission lines down to an equivalent width of ?3.5 Å supporting its BL Lac nature. The detection of a strong Lyman- ? break at ?5570 Å, on the other hand, confirms that J2119 is indeed a high-redshift ( z ? 3.59) quasar. Based on the prediction of a recent BL Lac evolution model, J1219 is one of the only two such objects expected to be present within the comoving volume at z = 3.5. Future identifications of more z > 3 ?-ray emitting BL Lac sources, therefore, will be crucial to verify the theories of their cosmic evolution.
|
|
En línea:
|
https://eprints.ucm.es/id/eprint/63257/1/cardiel116preprint.pdf
|
