Spectroscopy of 10 γ-Ray BL Lac Objects at High Redshift

Bibcode
2017ApJ...844..120P
DOI
10.3847/1538-4357/aa7aac
Paiano, S.; Landoni, Marco; Falomo, Renato; Treves, Aldo; Scarpa, R.
Referencia bibliográfica

The Astrophysical Journal, Volume 844, Issue 2, article id. 120, 7 pp. (2017).

Fecha de publicación:
8
2017
Revista
The Astrophysical Journal
Número de autores
5
Número de autores del IAC
1
Número de citas
32
Número de citas referidas
30
Descripción
We present optical spectra with high signal-to-noise ratio of 10 BL Lac objects detected at GeV energies by the Fermi satellite (3FGL catalog), which previous observations suggested are at relatively high redshift. The new observations, obtained at the 10 m Gran Telescopio Canarias, allowed us to find the redshift for J0814.5+2943 (z = 0.703), and we can set a spectroscopic lower limit for J0008.0+4713 (z > 1.659) and J1107.7+0222 (z > 1.0735) on the basis of Mg ii intervening absorption features. In addition we confirm the redshifts for J0505.5+0416 (z = 0.423) and J1450+5200 (z > 2.470). Finally we contradict the previous z estimates for five objects (J0049.7+0237, J0243.5+7119, J0802.0+1005, J1109.4+2411, and J2116.1+3339).
Proyectos relacionados
Imagen del Proyecto
Astrofísica Relativista y Teórica
El estudio de las lentes gravitatorias proporciona poderosas herramientas en Astrofísica y Cosmología. Las principales aplicaciones de las lentes gravitatorias en las que se centra este proyecto son las siguientes: (i) estudiar la presencia de subestructura de materia obscura en las galaxias lente a partir de las anomalías en la magnificación de
Evencio
Mediavilla Gradolph
En ejecución
Tipo
Con árbitro
Cosmología y Astropartículas (CYA)
Objetos BL Lacertae
Galaxias

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