Massive Molecular Outflow and 100 kpc Extended Cold Halo Gas in the Enormous Lyα Nebula of QSO 1228+3128

  • Li J
  • Emonts B
  • Cai Z
  • et al.
19Citations
Citations of this article
19Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The link between the circumgalactic medium (CGM) and the stellar growth of massive galaxies at high- z depends on the properties of the widespread cold molecular gas. As part of the SUPERCOLD-CGM survey (Survey of Protocluster ELANe Revealing CO/[C i ] in the Ly α -Detected CGM), we present the radio-loud QSO Q1228+3128 at z = 2.2218, which is embedded in an enormous Ly α nebula. ALMA+ACA observations of CO(4–3) reveal both a massive molecular outflow, and a more extended molecular gas reservoir across ∼100 kpc in the CGM, each containing a mass of M H2 ∼ 4–5 × 10 10 M ⊙ . The outflow and molecular CGM are aligned spatially, along the direction of an inner radio jet. After reanalysis of Ly α data of Q1228+3128 from the Keck Cosmic Web Imager, we found that the velocity of the extended CO agrees with the redshift derived from the Ly α nebula and the bulk velocity of the massive outflow. We propose a scenario where the radio source in Q1228+3128 is driving the molecular outflow and perhaps also enriching or cooling the CGM. In addition, we found that the extended CO emission is nearly perpendicular to the extended Ly α nebula spatially, indicating that the two gas phases are not well mixed, and possibly even represent different phenomena (e.g., outflow versus infall). Our results provide crucial evidence in support of predicted baryonic recycling processes that drive the early evolution of massive galaxies.

References Powered by Scopus

On the variation of the initial mass function

5852Citations
679Readers

This article is free to access.

4035Citations
1276Readers
Get full text
1684Citations
438Readers
Get full text

Cited by Powered by Scopus

32Citations
31Readers

This article is free to access.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Li, J., Emonts, B. H. C., Cai, Z., Prochaska, J. X., Yoon, I., Lehnert, M. D., … Villar-Martín, M. (2021). Massive Molecular Outflow and 100 kpc Extended Cold Halo Gas in the Enormous Lyα Nebula of QSO 1228+3128. The Astrophysical Journal Letters, 922(2), L29. https://doi.org/10.3847/2041-8213/ac390d

Readers over time

‘21‘22‘23‘24036912

Readers' Seniority

Tooltip

Researcher 5

45%

PhD / Post grad / Masters / Doc 4

36%

Professor / Associate Prof. 2

18%

Readers' Discipline

Tooltip

Physics and Astronomy 12

92%

Engineering 1

8%

Article Metrics

Tooltip
Mentions
References: 4

Save time finding and organizing research with Mendeley

Sign up for free
0