The Baltimore Oriole’s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3

Weichen Wang; Susan A. Kassin; S. M. Faber; David C. Koo; Emily C. Cunningham; Hassen M. Yesuf; Guillermo Barro; Puragra Guhathakurta; Benjamin J. Weiner; Alexander de la Vega; Yicheng Guo; Timothy M. Heckman; Camilla Pacifici; Bingjie Wang; Charlotte Welker

doi:10.3847/1538-4357/ac6592

The Baltimore Oriole’s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3

Weichen Wang, Susan A. Kassin, S. M. Faber, David C. Koo, Emily C. Cunningham, Hassen M. Yesuf, Guillermo Barro, Puragra Guhathakurta, Benjamin J. Weiner, Alexander de la Vega, Yicheng Guo, Timothy M. Heckman, Camilla Pacifici, Bingjie Wang, Charlotte Welker

Multiple Mirror Telescope Observatory

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

1 Scopus citations

Abstract

Strong galactic winds are ubiquitous at z ≳ 1. However, it is not well-known where inside galaxies these winds are launched from. We study the cool winds (∼10⁴ K) in two spatial regions of a massive galaxy at z = 1.3, which we nickname the “Baltimore Oriole’s Nest.” The galaxy has a stellar mass of 10^10.3±^0.3M_e, is located on the star-forming main sequence, and has a morphology indicative of a recent merger. Gas kinematics indicate a dynamically complex system with velocity gradients ranging from 0 to 60 km s⁻¹. The two regions studied are: a dust-reddened center (Central region), and a blue arc at 7 kpc from the center (Arc region). We measure the Fe II and Mg II absorption line profiles from deep Keck/DEIMOS spectra. Blueshifted wings up to 450 km s⁻¹ are found for both regions. The Fe II column densities of winds are 10^14.7±^0.2 cm⁻² and 10^14.6±^0.2 cm⁻² toward the Central and Arc regions, respectively. Our measurements suggest that the winds are most likely launched from both regions. The winds may be driven by the spatially extended star formation, the surface density of which is around 0.2 M_e yr⁻¹ · kpc⁻² in both regions. The mass outflow rates are estimated to be 4 M_e yr⁻¹ and 3 M_e yr⁻¹ for the Central and Arc regions, with uncertainties of one order of magnitude or more. The findings of this work and a few previous studies suggest that the cool galactic winds at z ≳1 might be commonly launched from the entire spatial extents of their host galaxies, due to extended galaxy star formation.

Original language	English (US)
Article number	146
Journal	Astrophysical Journal
Volume	930
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ac6592
State	Published - May 1 2022

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Wang, W., Kassin, S. A., Faber, S. M., Koo, D. C., Cunningham, E. C., Yesuf, H. M., Barro, G., Guhathakurta, P., Weiner, B. J., de la Vega, A., Guo, Y., Heckman, T. M., Pacifici, C., Wang, B., & Welker, C. (2022). The Baltimore Oriole’s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3. Astrophysical Journal, 930(2), [146]. https://doi.org/10.3847/1538-4357/ac6592

Wang, W, Kassin, SA, Faber, SM, Koo, DC, Cunningham, EC, Yesuf, HM, Barro, G, Guhathakurta, P, Weiner, BJ, de la Vega, A, Guo, Y, Heckman, TM, Pacifici, C, Wang, B & Welker, C 2022, 'The Baltimore Oriole’s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3', Astrophysical Journal, vol. 930, no. 2, 146. https://doi.org/10.3847/1538-4357/ac6592

@article{7138886f62c843a8a72a15f2cf2068b6,

title = "The Baltimore Oriole{\textquoteright}s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3",

abstract = "Strong galactic winds are ubiquitous at z ≳ 1. However, it is not well-known where inside galaxies these winds are launched from. We study the cool winds (∼104 K) in two spatial regions of a massive galaxy at z = 1.3, which we nickname the “Baltimore Oriole{\textquoteright}s Nest.” The galaxy has a stellar mass of 1010.3±0.3Me, is located on the star-forming main sequence, and has a morphology indicative of a recent merger. Gas kinematics indicate a dynamically complex system with velocity gradients ranging from 0 to 60 km s−1. The two regions studied are: a dust-reddened center (Central region), and a blue arc at 7 kpc from the center (Arc region). We measure the Fe II and Mg II absorption line profiles from deep Keck/DEIMOS spectra. Blueshifted wings up to 450 km s−1 are found for both regions. The Fe II column densities of winds are 1014.7±0.2 cm−2 and 1014.6±0.2 cm−2 toward the Central and Arc regions, respectively. Our measurements suggest that the winds are most likely launched from both regions. The winds may be driven by the spatially extended star formation, the surface density of which is around 0.2 Me yr−1 · kpc−2 in both regions. The mass outflow rates are estimated to be 4 Me yr−1 and 3 Me yr−1 for the Central and Arc regions, with uncertainties of one order of magnitude or more. The findings of this work and a few previous studies suggest that the cool galactic winds at z ≳1 might be commonly launched from the entire spatial extents of their host galaxies, due to extended galaxy star formation.",

author = "Weichen Wang and Kassin, {Susan A.} and Faber, {S. M.} and Koo, {David C.} and Cunningham, {Emily C.} and Yesuf, {Hassen M.} and Guillermo Barro and Puragra Guhathakurta and Weiner, {Benjamin J.} and {de la Vega}, Alexander and Yicheng Guo and Heckman, {Timothy M.} and Camilla Pacifici and Bingjie Wang and Charlotte Welker",

note = "Funding Information: We would like to thank the anonymous referee for a thorough and insightful report on the paper. W.W. and S.A.K. would like to acknowledge support from NASA{\textquoteright}s Astrophysics Data Analysis Program (ADAP) grant number 80NSSC20K0760 and an RSAC grant from the Space Telescope Science Institute. D.C.K. acknowledges support from the National Science Foundation grant AST-1615730. E.C.C. and P.G. acknowledge support from the National Science Foundation grant AST-1616540. E.C.C. is supported by a Flatiron Research Fellowship at the Flatiron Institute. The Flatiron Institute is supported by the Simons Foundation. C.P. is supported by the Canadian Space Agency under a contract with NRC Herzberg Astronomy and Astrophysics. H.Y. acknowledges support from the Research Fund for International Young Scientists of NSFC (11950410492). Funding Information: Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This work is based on observations taken by the CANDELS Multi-Cycle Treasury Program with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Publisher Copyright: {\textcopyright} 2022. The Author(s).",

year = "2022",

month = may,

day = "1",

doi = "10.3847/1538-4357/ac6592",

language = "English (US)",

volume = "930",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

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TY - JOUR

T1 - The Baltimore Oriole’s Nest

T2 - Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3

AU - Wang, Weichen

AU - Kassin, Susan A.

AU - Faber, S. M.

AU - Koo, David C.

AU - Cunningham, Emily C.

AU - Yesuf, Hassen M.

AU - Barro, Guillermo

AU - Guhathakurta, Puragra

AU - Weiner, Benjamin J.

AU - de la Vega, Alexander

AU - Guo, Yicheng

AU - Heckman, Timothy M.

AU - Pacifici, Camilla

AU - Wang, Bingjie

AU - Welker, Charlotte

N1 - Funding Information: We would like to thank the anonymous referee for a thorough and insightful report on the paper. W.W. and S.A.K. would like to acknowledge support from NASA’s Astrophysics Data Analysis Program (ADAP) grant number 80NSSC20K0760 and an RSAC grant from the Space Telescope Science Institute. D.C.K. acknowledges support from the National Science Foundation grant AST-1615730. E.C.C. and P.G. acknowledge support from the National Science Foundation grant AST-1616540. E.C.C. is supported by a Flatiron Research Fellowship at the Flatiron Institute. The Flatiron Institute is supported by the Simons Foundation. C.P. is supported by the Canadian Space Agency under a contract with NRC Herzberg Astronomy and Astrophysics. H.Y. acknowledges support from the Research Fund for International Young Scientists of NSFC (11950410492). Funding Information: Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This work is based on observations taken by the CANDELS Multi-Cycle Treasury Program with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Publisher Copyright: © 2022. The Author(s).

PY - 2022/5/1

Y1 - 2022/5/1

N2 - Strong galactic winds are ubiquitous at z ≳ 1. However, it is not well-known where inside galaxies these winds are launched from. We study the cool winds (∼104 K) in two spatial regions of a massive galaxy at z = 1.3, which we nickname the “Baltimore Oriole’s Nest.” The galaxy has a stellar mass of 1010.3±0.3Me, is located on the star-forming main sequence, and has a morphology indicative of a recent merger. Gas kinematics indicate a dynamically complex system with velocity gradients ranging from 0 to 60 km s−1. The two regions studied are: a dust-reddened center (Central region), and a blue arc at 7 kpc from the center (Arc region). We measure the Fe II and Mg II absorption line profiles from deep Keck/DEIMOS spectra. Blueshifted wings up to 450 km s−1 are found for both regions. The Fe II column densities of winds are 1014.7±0.2 cm−2 and 1014.6±0.2 cm−2 toward the Central and Arc regions, respectively. Our measurements suggest that the winds are most likely launched from both regions. The winds may be driven by the spatially extended star formation, the surface density of which is around 0.2 Me yr−1 · kpc−2 in both regions. The mass outflow rates are estimated to be 4 Me yr−1 and 3 Me yr−1 for the Central and Arc regions, with uncertainties of one order of magnitude or more. The findings of this work and a few previous studies suggest that the cool galactic winds at z ≳1 might be commonly launched from the entire spatial extents of their host galaxies, due to extended galaxy star formation.

AB - Strong galactic winds are ubiquitous at z ≳ 1. However, it is not well-known where inside galaxies these winds are launched from. We study the cool winds (∼104 K) in two spatial regions of a massive galaxy at z = 1.3, which we nickname the “Baltimore Oriole’s Nest.” The galaxy has a stellar mass of 1010.3±0.3Me, is located on the star-forming main sequence, and has a morphology indicative of a recent merger. Gas kinematics indicate a dynamically complex system with velocity gradients ranging from 0 to 60 km s−1. The two regions studied are: a dust-reddened center (Central region), and a blue arc at 7 kpc from the center (Arc region). We measure the Fe II and Mg II absorption line profiles from deep Keck/DEIMOS spectra. Blueshifted wings up to 450 km s−1 are found for both regions. The Fe II column densities of winds are 1014.7±0.2 cm−2 and 1014.6±0.2 cm−2 toward the Central and Arc regions, respectively. Our measurements suggest that the winds are most likely launched from both regions. The winds may be driven by the spatially extended star formation, the surface density of which is around 0.2 Me yr−1 · kpc−2 in both regions. The mass outflow rates are estimated to be 4 Me yr−1 and 3 Me yr−1 for the Central and Arc regions, with uncertainties of one order of magnitude or more. The findings of this work and a few previous studies suggest that the cool galactic winds at z ≳1 might be commonly launched from the entire spatial extents of their host galaxies, due to extended galaxy star formation.

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VL - 930

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JF - Astrophysical Journal

SN - 0004-637X

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ER -

The Baltimore Oriole’s Nest: Cool Winds from the Inner and Outer Parts of a Star-forming Galaxy at z=1.3

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