The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies

Andrew Weldon; Naveen A. Reddy; Michael W. Topping; Alice E. Shapley; Ryan L. Sanders; Xinnan Du; Sedona H. Price; Mariska Kriek; Alison L. Coil; Brian Siana; Bahram Mobasher; Tara Fetherolf; Irene Shivaei; Saeed Rezaee

doi:10.1093/mnras/stac1822

The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies

Andrew Weldon, Naveen A. Reddy, Michael W. Topping, Alice E. Shapley, Ryan L. Sanders, Xinnan Du, Sedona H. Price, Mariska Kriek, Alison L. Coil, Brian Siana, Bahram Mobasher, Tara Fetherolf, Irene Shivaei, Saeed Rezaee

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We investigate the conditions that facilitate galactic-scale outflows using a sample of 155 typical star-forming galaxies at z ∼2 drawn from the MOSFIRE Deep Evolution Field (MOSDEF) survey. The sample includes deep rest-frame UV spectroscopy from the Keck Low-Resolution Imaging Spectrometer (LRIS), which provides spectral coverage of several low-ionization interstellar (LIS) metal absorption lines and Lyα emission. Outflow velocities are calculated from the centroids of the LIS absorption and/or Lyα emission, as well as the highest velocity component of the outflow from the blue wings of the LIS absorption lines. Outflow velocities are found to be marginally correlated or independent of galaxy properties, such as star-formation rate (SFR) and star-formation rate surface density (ΣSFR). Outflow velocity scales with SFR as a power-law with index 0.24, which suggests that the outflows may be primarily driven by mechanical energy generated by supernovae explosions, as opposed to radiation pressure acting on dusty material. On the other hand, outflow velocity and ΣSFR are not significantly correlated, which may be due to the limited dynamic range of ΣSFR probed by our sample. The relationship between outflow velocity and ΣSFR normalized by stellar mass (ΣsSFR), as a proxy for gravitational potential, suggests that strong outflows (e.g. > 200 km s-1) become common above a threshold of log(ΣsSFR yr-1 kpc-2) ∼-11.3, and that above this threshold, outflow velocity uncouples from ΣsSFR. These results highlight the need for higher resolution spectroscopic data and spatially resolved imaging to test the driving mechanisms of outflows predicted by theory.

Original language	English
Pages (from-to)	841-856
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	515
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stac1822
State	Published - Sep 1 2022

Bibliographical note

Funding Information:
We thank the anonymous referee for pro viding constructiv e feed- back that impro v ed the paper. We acknowledge support from NSF AAG grants AST1312780, 1312547, 1312764, and 1313171, grant AR13907 from the Space Telescope Science Institute, and grant NNX16AF54G from the NASA ADAP program. We thank the 3D-HST Collaboration, which provided the spectroscopic and photometric catalogues used to select the MOSDEF targets and derive stellar population parameters. This research used ASTROPY, 14 a community-developed core Python package for Astronomy (Astropy Collaboration 2013, 2018 ). We wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain we are privileged to be guests. Without their generous hospitality, most of the observations presented herein would not have been possible.

Publisher Copyright:
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

Keywords

galaxies: ISM
galaxies: evolution
galaxies: high-redshift

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stac1822

Cite this

Weldon, A., Reddy, N. A., Topping, M. W., Shapley, A. E., Sanders, R. L., Du, X., Price, S. H., Kriek, M., Coil, A. L., Siana, B., Mobasher, B., Fetherolf, T., Shivaei, I., & Rezaee, S. (2022). The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 515(1), 841-856. https://doi.org/10.1093/mnras/stac1822

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title = "The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies",

abstract = "We investigate the conditions that facilitate galactic-scale outflows using a sample of 155 typical star-forming galaxies at z ∼2 drawn from the MOSFIRE Deep Evolution Field (MOSDEF) survey. The sample includes deep rest-frame UV spectroscopy from the Keck Low-Resolution Imaging Spectrometer (LRIS), which provides spectral coverage of several low-ionization interstellar (LIS) metal absorption lines and Lyα emission. Outflow velocities are calculated from the centroids of the LIS absorption and/or Lyα emission, as well as the highest velocity component of the outflow from the blue wings of the LIS absorption lines. Outflow velocities are found to be marginally correlated or independent of galaxy properties, such as star-formation rate (SFR) and star-formation rate surface density (ΣSFR). Outflow velocity scales with SFR as a power-law with index 0.24, which suggests that the outflows may be primarily driven by mechanical energy generated by supernovae explosions, as opposed to radiation pressure acting on dusty material. On the other hand, outflow velocity and ΣSFR are not significantly correlated, which may be due to the limited dynamic range of ΣSFR probed by our sample. The relationship between outflow velocity and ΣSFR normalized by stellar mass (ΣsSFR), as a proxy for gravitational potential, suggests that strong outflows (e.g. > 200 km s-1) become common above a threshold of log(ΣsSFR yr-1 kpc-2) ∼-11.3, and that above this threshold, outflow velocity uncouples from ΣsSFR. These results highlight the need for higher resolution spectroscopic data and spatially resolved imaging to test the driving mechanisms of outflows predicted by theory.",

keywords = "galaxies: ISM, galaxies: evolution, galaxies: high-redshift",

author = "Andrew Weldon and Reddy, {Naveen A.} and Topping, {Michael W.} and Shapley, {Alice E.} and Sanders, {Ryan L.} and Xinnan Du and Price, {Sedona H.} and Mariska Kriek and Coil, {Alison L.} and Brian Siana and Bahram Mobasher and Tara Fetherolf and Irene Shivaei and Saeed Rezaee",

note = "Funding Information: We thank the anonymous referee for pro viding constructiv e feed- back that impro v ed the paper. We acknowledge support from NSF AAG grants AST1312780, 1312547, 1312764, and 1313171, grant AR13907 from the Space Telescope Science Institute, and grant NNX16AF54G from the NASA ADAP program. We thank the 3D-HST Collaboration, which provided the spectroscopic and photometric catalogues used to select the MOSDEF targets and derive stellar population parameters. This research used ASTROPY, 14 a community-developed core Python package for Astronomy (Astropy Collaboration 2013, 2018 ). We wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain we are privileged to be guests. Without their generous hospitality, most of the observations presented herein would not have been possible. Publisher Copyright: {\textcopyright} 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2022",

month = sep,

day = "1",

doi = "10.1093/mnras/stac1822",

language = "English",

volume = "515",

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Weldon, A, Reddy, NA, Topping, MW, Shapley, AE, Sanders, RL, Du, X, Price, SH, Kriek, M, Coil, AL, Siana, B, Mobasher, B, Fetherolf, T, Shivaei, I & Rezaee, S 2022, 'The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies', Monthly Notices of the Royal Astronomical Society, vol. 515, no. 1, pp. 841-856. https://doi.org/10.1093/mnras/stac1822

TY - JOUR

T1 - The MOSDEF-LRIS survey

T2 - connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies

AU - Weldon, Andrew

AU - Reddy, Naveen A.

AU - Topping, Michael W.

AU - Shapley, Alice E.

AU - Sanders, Ryan L.

AU - Du, Xinnan

AU - Price, Sedona H.

AU - Kriek, Mariska

AU - Coil, Alison L.

AU - Siana, Brian

AU - Mobasher, Bahram

AU - Fetherolf, Tara

AU - Shivaei, Irene

AU - Rezaee, Saeed

N1 - Funding Information: We thank the anonymous referee for pro viding constructiv e feed- back that impro v ed the paper. We acknowledge support from NSF AAG grants AST1312780, 1312547, 1312764, and 1313171, grant AR13907 from the Space Telescope Science Institute, and grant NNX16AF54G from the NASA ADAP program. We thank the 3D-HST Collaboration, which provided the spectroscopic and photometric catalogues used to select the MOSDEF targets and derive stellar population parameters. This research used ASTROPY, 14 a community-developed core Python package for Astronomy (Astropy Collaboration 2013, 2018 ). We wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain we are privileged to be guests. Without their generous hospitality, most of the observations presented herein would not have been possible. Publisher Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - We investigate the conditions that facilitate galactic-scale outflows using a sample of 155 typical star-forming galaxies at z ∼2 drawn from the MOSFIRE Deep Evolution Field (MOSDEF) survey. The sample includes deep rest-frame UV spectroscopy from the Keck Low-Resolution Imaging Spectrometer (LRIS), which provides spectral coverage of several low-ionization interstellar (LIS) metal absorption lines and Lyα emission. Outflow velocities are calculated from the centroids of the LIS absorption and/or Lyα emission, as well as the highest velocity component of the outflow from the blue wings of the LIS absorption lines. Outflow velocities are found to be marginally correlated or independent of galaxy properties, such as star-formation rate (SFR) and star-formation rate surface density (ΣSFR). Outflow velocity scales with SFR as a power-law with index 0.24, which suggests that the outflows may be primarily driven by mechanical energy generated by supernovae explosions, as opposed to radiation pressure acting on dusty material. On the other hand, outflow velocity and ΣSFR are not significantly correlated, which may be due to the limited dynamic range of ΣSFR probed by our sample. The relationship between outflow velocity and ΣSFR normalized by stellar mass (ΣsSFR), as a proxy for gravitational potential, suggests that strong outflows (e.g. > 200 km s-1) become common above a threshold of log(ΣsSFR yr-1 kpc-2) ∼-11.3, and that above this threshold, outflow velocity uncouples from ΣsSFR. These results highlight the need for higher resolution spectroscopic data and spatially resolved imaging to test the driving mechanisms of outflows predicted by theory.

AB - We investigate the conditions that facilitate galactic-scale outflows using a sample of 155 typical star-forming galaxies at z ∼2 drawn from the MOSFIRE Deep Evolution Field (MOSDEF) survey. The sample includes deep rest-frame UV spectroscopy from the Keck Low-Resolution Imaging Spectrometer (LRIS), which provides spectral coverage of several low-ionization interstellar (LIS) metal absorption lines and Lyα emission. Outflow velocities are calculated from the centroids of the LIS absorption and/or Lyα emission, as well as the highest velocity component of the outflow from the blue wings of the LIS absorption lines. Outflow velocities are found to be marginally correlated or independent of galaxy properties, such as star-formation rate (SFR) and star-formation rate surface density (ΣSFR). Outflow velocity scales with SFR as a power-law with index 0.24, which suggests that the outflows may be primarily driven by mechanical energy generated by supernovae explosions, as opposed to radiation pressure acting on dusty material. On the other hand, outflow velocity and ΣSFR are not significantly correlated, which may be due to the limited dynamic range of ΣSFR probed by our sample. The relationship between outflow velocity and ΣSFR normalized by stellar mass (ΣsSFR), as a proxy for gravitational potential, suggests that strong outflows (e.g. > 200 km s-1) become common above a threshold of log(ΣsSFR yr-1 kpc-2) ∼-11.3, and that above this threshold, outflow velocity uncouples from ΣsSFR. These results highlight the need for higher resolution spectroscopic data and spatially resolved imaging to test the driving mechanisms of outflows predicted by theory.

KW - galaxies: ISM

KW - galaxies: evolution

KW - galaxies: high-redshift

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U2 - 10.1093/mnras/stac1822

DO - 10.1093/mnras/stac1822

M3 - Article

AN - SCOPUS:85135381598

SN - 0035-8711

VL - 515

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EP - 856

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

The MOSDEF-LRIS survey: connection between galactic-scale outflows and the properties of z ∼2 star-forming galaxies

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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