The MOSDEF-LRIS survey: detection of inflowing gas towards three star-forming galaxies at <i>z</i> ∼ 2-Reference-Cited by-同舟云学术

The MOSDEF-LRIS survey: detection of inflowing gas towards three star-forming galaxies at z ∼ 2

Published:2023-06-01 Issue:4 Volume:523 Page:5624-5634
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Weldon Andrew¹^ORCID,Reddy Naveen A¹,Topping Michael W²^ORCID,Shapley Alice E³,Du Xinnan⁴,Price Sedona H⁵^ORCID,Sanders Ryan L⁶^ORCID,Coil Alison L⁷,Mobasher Bahram¹,Kriek Mariska⁸,Siana Brian¹,Rezaee Saeed¹^ORCID

Affiliation:

1. Department of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USA

2. Steward Observatory, University of Arizona , 933 N Cherry Ave, Tucson, AZ 85721, USA

3. Physics & Astronomy Department, University of California, Los Angeles , 430 Portola Plaza, Los Angeles, CA 90095, USA

4. Kavli Institute for Particle Astrophysics & Cosmology, Stanford University , P. O. Box 2450, Stanford, CA 94305, USA

5. Department of Physics & Astronomy and PITT PACC, University of Pittsburgh , Pittsburgh, PA 15260, USA

6. Department of Physics and Astronomy, University of California, Davis , One Shields Ave, Davis, CA 95616, USA

7. Center for Astrophysics and Space Sciences, Department of Physics, University of California, San Diego , 9500 Gilman Dr, La Jolla, San Diego, CA 92093-0424, USA

8. Leiden Observatory, Leiden University , P. O. Box 9513, NL-2300 RA Leiden, the Netherlands

Abstract

ABSTRACT We report on the discovery of cool gas inflows towards three star-forming galaxies at <z> ∼ 2.30. Analysis of Keck Low-Resolution Imaging Spectrometer spectroscopy reveals redshifted low-ionization interstellar (LIS) metal absorption lines with centroid velocities of 60–130 km s−1. These inflows represent some of the most robust detections of inflowing gas into isolated, star-forming galaxies at high redshift. Our analysis suggests that the inflows are due to recycling metal-enriched gas from previous ejections. Comparisons between the galaxies with inflows and a larger parent sample of 131 objects indicate that galaxies with detected inflows may have higher specific star formation rates (sSFRs) and star-formation-rate surface densities (ΣSFR). However, when additional galaxies without robustly detected inflows based on centroid velocity but whose LIS absorption line profiles indicate large red-wing velocities are considered, galaxies with inflows do not show unique properties relative to those lacking inflows. Additionally, we calculate the covering fraction of cool inflowing gas as a function of red-wing inflow velocity, finding an enhancement in high-sSFR binned galaxies, likely due to an increase in the amount of recycling gas. Together, these results suggest that the low detection rate of galaxies with cool inflows is primarily related to the viewing angle rather than the physical properties of the galaxies.

Funder

NSF

Space Telescope Science Institute

NASA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad1615/50504599/stad1615.pdf

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