A [C II] 158 mu m emitter associated with an O I absorber at the end of the reionization epoch
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The physical and chemical properties of the circumgalactic medium at z greater than or similar to 6 have been studied successfully through the absorption in the spectra of background quasi-stellar objects(1-3). One of the most crucial questions is to Investigate the nature and location of the source galaxies that give rise to these early metal absorbers(4-6). Theoretical models suggest that momentum-driven outflows from typical star-forming galaxies can eject metals into the circumgalactic medium and the intergalactic medium at z = 5-6 (refs. (7-9)). Deep, dedicated surveys have searched for Ly alpha emission associated with strong C IV absorbers at z approximate to 6, but only a few Ly alpha-emitter candidates have been detected. Interpreting these detections is moreover ambiguous because Ly alpha is a resonant line(10-12), raising the need for complementary techniques for detecting absorbers' host galaxies. Here we report a [C II] 158 mu m emitter detected using the Atacama Large Millimeter Array that is associated with a strong low-ionization absorber, O I, at z = 5.978. The projected impact parameter between O I and [C II] emitter is 20.0 kpc. The measured [CII] luminosity is 7.0 x 10(7) solar luminosities. Further analysis indicates that strong O I absorbers may reside in the circumgalactic medium of massive halos one to two orders of magnitude more massive than expected values(8,14).
Original language | English |
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Journal | Nature Astronomy |
Volume | 5 |
Pages (from-to) | 1110-1117 |
Number of pages | 16 |
ISSN | 2397-3366 |
DOIs | |
Publication status | Published - 27 Sep 2021 |
- SIMILAR-TO 6, STAR-FORMATION, HOST GALAXIES, CIRCUMGALACTIC MEDIUM, INTERGALACTIC MEDIUM, SPECTROSCOPIC SURVEY, ULTRAVIOLET-SPECTRA, LUMINOSITY FUNCTION, DUST CONTENT, EMISSION
Research areas
Links
- https://arxiv.org/pdf/2109.13257.pdf
Submitted manuscript
ID: 281221831