Artículo
New observations with gemini and GTC of the VHE blazar KUV 00311–1938: About its redshift and environment
Pichel, Ana Carolina
; Donzelli, Carlos Jose
; Rosa Gonzalez, D.; Fernandez Alonso, Mateo
; Rovero, Adrian Carlos
; Muriel, Hernan
; Mayya, Y. D.; Aretxaga, I.; Becerra González, J.; Carramiñana, Alberto; Mendez Abreu, J.; Vega, O.; Terlevich, E.; Terlevich, R. J.
Fecha de publicación:
01/2021
Editorial:
IOP Publishing
Revista:
Publications of the Astronomical Society of the Pacific
e-ISSN:
1538-3873
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Extragalactic very-high-energy (VHE; E > 100 GeV) sources are unique objects to study the most powerful particle accelerators in nature, as active galactic nuclei are likely sources of ultra-high-energy cosmic rays. BL Lacertae blazars are the most frequent extragalactic objects found in the VHE gamma-ray catalogs. It is very difficult to estimate their redshifts, considering they have no strong enough optical spectral features, hence ∼20% of them have unknown or poorly constrained redshifts. KUV 00311–1938 is a VHE BL Lacertae blazar, with an uncertain redshift in the range of 0.5 < z < 0.98. We have obtained deep spectroscopy using Gemini and the GTC telescopes of KUV 00311–1938 and its surroundings with high signal-to-noise ratio in 2016–2017. The lack of features did not allow us to determine the spectroscopic redshift of KUV 00311–1938; nevertheless, we obtain a lower limit of z ≳ 0.475. We determined the redshifts of 41 galaxies observed in the field-of-view of the blazar and through a population study, identified three pairs and four groups consisting of 3 or 4 members with redshifts in the range z = 0.1468–0.4756. Due to the absence of a large group of galaxies, we could not associate KUV 00311–1938 with any of the groups detected.
Palabras clave:
1938
,
BL LACERTAE OBJECTS: KUV 00311
,
GALAXY DISTANCES
,
GALAXY GROUPS
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Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Pichel, Ana Carolina; Donzelli, Carlos Jose; Rosa Gonzalez, D.; Fernandez Alonso, Mateo; Rovero, Adrian Carlos; et al.; New observations with gemini and GTC of the VHE blazar KUV 00311–1938: About its redshift and environment; IOP Publishing; Publications of the Astronomical Society of the Pacific; 133; 1019; 1-2021; 1-8
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