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Pregled bibliografske jedinice broj: 927757

Resolving the Host Galaxy of a Distant Blazar with LBT/LUCI 1 + ARGOS

Farina, E P; Georgiev, I Y; Decarli, R; Terzić, T; Busoni, L; Gässler, W; Mazzoni, T; Borelli, J; Rosensteiner, M; Ziegleder, J et al.
Resolving the Host Galaxy of a Distant Blazar with LBT/LUCI 1 + ARGOS // Monthly notices of the Royal Astronomical Society, 476 (2018), 2; 1835-1839 doi:10.1093/mnras/sty352 (međunarodna recenzija, članak, znanstveni)

Resolving the Host Galaxy of a Distant Blazar with LBT/LUCI 1 + ARGOS

Farina, E P ; Georgiev, I Y ; Decarli, R ; Terzić, T ; Busoni, L ; Gässler, W ; Mazzoni, T ; Borelli, J ; Rosensteiner, M ; Ziegleder, J ; Bonaglia, M ; Rabien, S ; Buschkamp, P ; de Xivry, G Orban ; Rahmer, G ; Kulas, M ; Peter, D

Monthly notices of the Royal Astronomical Society (0035-8711) 476 (2018), 2; 1835-1839

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Instrumentation: adaptive optics, infrared: galaxies, BL Lacertae objects: individual: HESS J1943+213

BL Lac objects emitting in the Very High Energy (VHE) regime are unique tools to peer into the properties of the Extragalactic Background Light (EBL). However, due to the typical absence of features in their spectra, the determination of their redshifts has proven challenging. In this work we exploit the superb spatial resolution delivered by the new Advanced Rayleigh guided Ground layer adaptive Optics System (ARGOS) at the Large Binocular Telescope to detect the host galaxy of HESS J1943+213, a VHE emitting BL Lac shining through the Galaxy. Deep H–band imaging collected during the ARGOS commissioning allowed us to separate the contribution of the nuclear emission and to unveil the properties of the host galaxy with unprecedented detail. The host galaxy is well fitted by a Sérsic profile with index of n∼2 and total magnitude of HHost∼16.15 mag. Under the assumption that BL Lac host galaxies are standard candles, we infer a redshift of z∼0.21. In the framework of the current model for the EBL, this value is in agreement with the observed dimming of the VHE spectrum due to the scatter of energetic photons on the EBL.

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Autor s matičnim brojem:
Tomislav Terzić, (312710)

Časopis indeksira:

  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus