The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger

Eduardo Bañados, Mladen Novak, Marcel Neeleman, Fabian Walter, Roberto Decarli, Bram P. Venemans, Chiara Mazzucchelli, Chris Carilli, Feige Wang, Xiaohui Fan, Emanuele P. Farina, Hans Walter Rix

Research output: Contribution to journalArticle

Abstract

We present ALMA 0.″28 × 0.″20 (1.4 kpc × 1.0 kpc) resolution observations of the [C ii] 158 μm line and underlying dust continuum in the host galaxy of the most distant quasar currently known, ULAS J1342+0928 at z = 7.5413. Both the [C ii] and continuum are detected and spatially resolved. The [C ii] line is ∼1.5 times more extended than the continuum emission, showing an elongated and complex structure of approximately 3.2 kpc × 6.4 kpc. Two separate peaks are clearly seen (6σ each) in three 100 km s-1 width [C ii] channel maps. The velocity field of the [C ii] gas does not show evidence of a coherent rotation field but rather chaotic motion reminiscent of an ongoing merger.

Original languageEnglish (US)
Article numberL23
JournalAstrophysical Journal Letters
Volume881
Issue number1
DOIs
StatePublished - Aug 10 2019

Fingerprint

merger
quasars
galaxies
continuums
dust
gas
velocity distribution
gases

Keywords

  • cosmology: observations
  • early universe
  • galaxies: ISM
  • galaxies: kinematics and dynamics
  • quasars: individual (ULAS J134208.10+092838.35)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bañados, E., Novak, M., Neeleman, M., Walter, F., Decarli, R., Venemans, B. P., ... Rix, H. W. (2019). The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. Astrophysical Journal Letters, 881(1), [L23]. https://doi.org/10.3847/2041-8213/ab3659

The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. / Bañados, Eduardo; Novak, Mladen; Neeleman, Marcel; Walter, Fabian; Decarli, Roberto; Venemans, Bram P.; Mazzucchelli, Chiara; Carilli, Chris; Wang, Feige; Fan, Xiaohui; Farina, Emanuele P.; Rix, Hans Walter.

In: Astrophysical Journal Letters, Vol. 881, No. 1, L23, 10.08.2019.

Research output: Contribution to journalArticle

Bañados, E, Novak, M, Neeleman, M, Walter, F, Decarli, R, Venemans, BP, Mazzucchelli, C, Carilli, C, Wang, F, Fan, X, Farina, EP & Rix, HW 2019, 'The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger', Astrophysical Journal Letters, vol. 881, no. 1, L23. https://doi.org/10.3847/2041-8213/ab3659
Bañados E, Novak M, Neeleman M, Walter F, Decarli R, Venemans BP et al. The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. Astrophysical Journal Letters. 2019 Aug 10;881(1). L23. https://doi.org/10.3847/2041-8213/ab3659
Bañados, Eduardo ; Novak, Mladen ; Neeleman, Marcel ; Walter, Fabian ; Decarli, Roberto ; Venemans, Bram P. ; Mazzucchelli, Chiara ; Carilli, Chris ; Wang, Feige ; Fan, Xiaohui ; Farina, Emanuele P. ; Rix, Hans Walter. / The z = 7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. In: Astrophysical Journal Letters. 2019 ; Vol. 881, No. 1.
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