A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Near-infrared imaging of the host galaxies of three radio-loud quasars at z similar to 1.5
Tekijät: Falomo R, Kotilainen J, Treves A
Kustantaja: UNIV CHICAGO PRESS
Julkaisuvuosi: 2001
Lehti:: Astrophysical Journal
Tietokannassa oleva lehden nimi: ASTROPHYSICAL JOURNAL
Lehden akronyymi: ASTROPHYS J
Vuosikerta: 547
Numero: 1
Aloitussivu: 124
Lopetussivu: 128
Sivujen määrä: 5
ISSN: 0004-637X
DOI: https://doi.org/10.1086/318370
Tiivistelmä
We present high spatial resolution near-infrared H-band (1.65 mum) images, taken with ISAAC on UT1 of the ESO Very Large Telescope, of three radio-loud quasars at z similar to 1.5, as a pilot study for imaging of a larger sample of radio-loud and radio-quiet quasars in the redshift range 1 < z < 2. We are able to clearly detect the host galaxy in two quasars (PKS 0000-177 and PKS 0348-120) and marginally in the third (PKS 0402-362). The host galaxies appear compact (average bulge scale length R(e) similar to 4 kpc) and luminous [average M-H = -27.6 +/- 0.1]. They are similar to2.5 mag more luminous than the typical galaxy luminosity and are comparable to the hosts of low-redshift radio-loud quasars [M-H similar to -26], taking into account passive stellar evolution. Their luminosities are also similar to those of high-redshift radio galaxies. All three quasars have at least one close companion galaxy at a projected distance less than 50 kpc from the quasar, assuming they are at the same redshift.
We present high spatial resolution near-infrared H-band (1.65 mum) images, taken with ISAAC on UT1 of the ESO Very Large Telescope, of three radio-loud quasars at z similar to 1.5, as a pilot study for imaging of a larger sample of radio-loud and radio-quiet quasars in the redshift range 1 < z < 2. We are able to clearly detect the host galaxy in two quasars (PKS 0000-177 and PKS 0348-120) and marginally in the third (PKS 0402-362). The host galaxies appear compact (average bulge scale length R(e) similar to 4 kpc) and luminous [average M-H = -27.6 +/- 0.1]. They are similar to2.5 mag more luminous than the typical galaxy luminosity and are comparable to the hosts of low-redshift radio-loud quasars [M-H similar to -26], taking into account passive stellar evolution. Their luminosities are also similar to those of high-redshift radio galaxies. All three quasars have at least one close companion galaxy at a projected distance less than 50 kpc from the quasar, assuming they are at the same redshift.
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