The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5

Serena Perrotta; Alison L. Coil; David S. N. Rupke; Wenmeng Ning; Brendan Duong; Aleksandar M. Diamond-Stanic; Drummond B. Fielding; James E. Geach; Ryan C. Hickox; John Moustakas; Gregory H. Rudnick; Paul H. Sell; Cameren N. Swiggum; Christy A. Tremonti

doi:10.3847/1538-4357/ad7b0c

The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5

Serena Perrotta, Alison L. Coil, David S. N. Rupke, Wenmeng Ning, Brendan Duong, Aleksandar M. Diamond-Stanic, Drummond B. Fielding, James E. Geach, Ryan C. Hickox, John Moustakas, Gregory H. Rudnick, Paul H. Sell, Cameren N. Swiggum, Christy A. Tremonti

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Abstract

High-velocity outflows are ubiquitous in compact, massive (M * ∼ 1011 M ⊙), z ∼ 0.5 galaxies with extreme star formation surface densities (ΣSFR ∼ 2000 M ⊙ yr−1 kpc−2). We have previously detected and characterized these outflows using Mg ii absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [O ii] and Mg ii emission nebulae surrounding all of the 12 galaxies in this study. We find that [O ii] is more effective than Mg ii in tracing low surface brightness, extended emission in these galaxies. The [O ii] nebulae are spatially extended beyond the stars, with radial extent R 90 between 10 and 40 kpc. The nebulae exhibit nongravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from −335 to −1920 km s−1. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last

Original language	English
Article number	263
Pages (from-to)	1-29
Number of pages	29
Journal	The Astrophysical Journal
Volume	975
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ad7b0c
Publication status	Published - 1 Nov 2024

Keywords

Stellar feedback
Starburst galaxies
Galactic winds
Circumgalactic medium

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© 2024 The Author(s). This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/
Final published version, 3.17 MBLicence: CC BY

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Perrotta, S., Coil, A. L., Rupke, D. S. N., Ning, W., Duong, B., Diamond-Stanic, A. M., Fielding, D. B., Geach, J. E., Hickox, R. C., Moustakas, J., Rudnick, G. H., Sell, P. H., Swiggum, C. N., & Tremonti, C. A. (2024). The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5. The Astrophysical Journal, 975(2), 1-29. Article 263. https://doi.org/10.3847/1538-4357/ad7b0c

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title = "The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5",

abstract = "High-velocity outflows are ubiquitous in compact, massive (M * ∼ 1011 M ⊙), z ∼ 0.5 galaxies with extreme star formation surface densities (ΣSFR ∼ 2000 M ⊙ yr−1 kpc−2). We have previously detected and characterized these outflows using Mg ii absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [O ii] and Mg ii emission nebulae surrounding all of the 12 galaxies in this study. We find that [O ii] is more effective than Mg ii in tracing low surface brightness, extended emission in these galaxies. The [O ii] nebulae are spatially extended beyond the stars, with radial extent R 90 between 10 and 40 kpc. The nebulae exhibit nongravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from −335 to −1920 km s−1. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last",

keywords = "Stellar feedback, Starburst galaxies, Galactic winds, Circumgalactic medium",

author = "Serena Perrotta and Coil, {Alison L.} and Rupke, {David S. N.} and Wenmeng Ning and Brendan Duong and Diamond-Stanic, {Aleksandar M.} and Fielding, {Drummond B.} and Geach, {James E.} and Hickox, {Ryan C.} and John Moustakas and Rudnick, {Gregory H.} and Sell, {Paul H.} and Swiggum, {Cameren N.} and Tremonti, {Christy A.}",

note = "{\textcopyright} 2024 The Author(s). This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/",

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T1 - The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5

AU - Perrotta, Serena

AU - Coil, Alison L.

AU - Rupke, David S. N.

AU - Ning, Wenmeng

AU - Duong, Brendan

AU - Diamond-Stanic, Aleksandar M.

AU - Fielding, Drummond B.

AU - Geach, James E.

AU - Hickox, Ryan C.

AU - Moustakas, John

AU - Rudnick, Gregory H.

AU - Sell, Paul H.

AU - Swiggum, Cameren N.

AU - Tremonti, Christy A.

PY - 2024/11/1

Y1 - 2024/11/1

N2 - High-velocity outflows are ubiquitous in compact, massive (M * ∼ 1011 M ⊙), z ∼ 0.5 galaxies with extreme star formation surface densities (ΣSFR ∼ 2000 M ⊙ yr−1 kpc−2). We have previously detected and characterized these outflows using Mg ii absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [O ii] and Mg ii emission nebulae surrounding all of the 12 galaxies in this study. We find that [O ii] is more effective than Mg ii in tracing low surface brightness, extended emission in these galaxies. The [O ii] nebulae are spatially extended beyond the stars, with radial extent R 90 between 10 and 40 kpc. The nebulae exhibit nongravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from −335 to −1920 km s−1. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last

AB - High-velocity outflows are ubiquitous in compact, massive (M * ∼ 1011 M ⊙), z ∼ 0.5 galaxies with extreme star formation surface densities (ΣSFR ∼ 2000 M ⊙ yr−1 kpc−2). We have previously detected and characterized these outflows using Mg ii absorption lines. To probe their full extent, we present Keck/KCWI integral field spectroscopy of the [O ii] and Mg ii emission nebulae surrounding all of the 12 galaxies in this study. We find that [O ii] is more effective than Mg ii in tracing low surface brightness, extended emission in these galaxies. The [O ii] nebulae are spatially extended beyond the stars, with radial extent R 90 between 10 and 40 kpc. The nebulae exhibit nongravitational motions, indicating galactic outflows with maximum blueshifted velocities ranging from −335 to −1920 km s−1. The outflow kinematics correlate with the bursty star formation histories of these galaxies. Galaxies with the most recent bursts of star formation (within the last

KW - Stellar feedback

KW - Starburst galaxies

KW - Galactic winds

KW - Circumgalactic medium

U2 - 10.3847/1538-4357/ad7b0c

DO - 10.3847/1538-4357/ad7b0c

M3 - Article

SN - 0004-637X

VL - 975

SP - 1

EP - 29

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 2

M1 - 263

ER -

The Outflowing [O ii ] Nebulae of Compact Starburst Galaxies at z ∼ 0.5

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