We present an imaging study of the black hole binary candidate SDSS J1536+0441 (z ≈ 0.3893), based on deep, high-resolution V z K images collected at the ESO/Very Large Telescope. The images clearly show an asymmetric elongation, indicating the presence of a companion source at ~1'' (≈5 kpc projected distance) east from the quasar. The host galaxy of the quasar is marginally resolved. We find that the companion source is a luminous galaxy, the light profile of which suggests the presence of an unresolved, faint nucleus (either an obscured active galactic nucleus or a compact stellar bulge). The study of the environment around the quasar indicates the occurrence of a significant overdensity of galaxies with a redshift compatible with z ≈ 0.4. This suggests that it resides in a moderately rich cluster of galaxies

Decarli, R., Dotti, M., Falomo, R., Treves, A., Colpi, M., Kotilainen, J., et al. (2009). Probing the nature of the massive black hole binary candidate SDSS J1536+0441. THE ASTROPHYSICAL JOURNAL, 703(1), L76-L80 [10.1088/0004-637X/703/1/L76].

Probing the nature of the massive black hole binary candidate SDSS J1536+0441

DOTTI, MASSIMO;COLPI, MONICA;
2009

Abstract

We present an imaging study of the black hole binary candidate SDSS J1536+0441 (z ≈ 0.3893), based on deep, high-resolution V z K images collected at the ESO/Very Large Telescope. The images clearly show an asymmetric elongation, indicating the presence of a companion source at ~1'' (≈5 kpc projected distance) east from the quasar. The host galaxy of the quasar is marginally resolved. We find that the companion source is a luminous galaxy, the light profile of which suggests the presence of an unresolved, faint nucleus (either an obscured active galactic nucleus or a compact stellar bulge). The study of the environment around the quasar indicates the occurrence of a significant overdensity of galaxies with a redshift compatible with z ≈ 0.4. This suggests that it resides in a moderately rich cluster of galaxies
Articolo in rivista - Articolo scientifico
quasars, individual, SDSS J153636.22+044127.0
English
2009
703
1
L76
L80
none
Decarli, R., Dotti, M., Falomo, R., Treves, A., Colpi, M., Kotilainen, J., et al. (2009). Probing the nature of the massive black hole binary candidate SDSS J1536+0441. THE ASTROPHYSICAL JOURNAL, 703(1), L76-L80 [10.1088/0004-637X/703/1/L76].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/21640
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