High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2

Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt

Standard

High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2. / Kanekar, N.; Prochaska, J. X.; Neeleman, M.; Christensen, L.; Moller, P.; Zwaan, M. A.; Fynbo, J. P. U.; Dessauges-Zavadsky, M.

I: Astrophysical Journal Letters, Bind 901, Nr. 1, 5, 20.09.2020.

Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt

Harvard

Kanekar, N, Prochaska, JX, Neeleman, M, Christensen, L, Moller, P, Zwaan, MA, Fynbo, JPU & Dessauges-Zavadsky, M 2020, 'High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2', Astrophysical Journal Letters, bind 901, nr. 1, 5. https://doi.org/10.3847/2041-8213/abb4e1

APA

Kanekar, N., Prochaska, J. X., Neeleman, M., Christensen, L., Moller, P., Zwaan, M. A., Fynbo, J. P. U., & Dessauges-Zavadsky, M. (2020). High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2. Astrophysical Journal Letters, 901(1), [5]. https://doi.org/10.3847/2041-8213/abb4e1

Vancouver

Kanekar N, Prochaska JX, Neeleman M, Christensen L, Moller P, Zwaan MA o.a. High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2. Astrophysical Journal Letters. 2020 sep. 20;901(1). 5. https://doi.org/10.3847/2041-8213/abb4e1

Author

Kanekar, N. ; Prochaska, J. X. ; Neeleman, M. ; Christensen, L. ; Moller, P. ; Zwaan, M. A. ; Fynbo, J. P. U. ; Dessauges-Zavadsky, M. / High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2. I: Astrophysical Journal Letters. 2020 ; Bind 901, Nr. 1.

Bibtex

@article{fa86e50243d041a7bf381c8c1aea8285,
title = "High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2",
abstract = "We have used the Atacama Large Millimeter/submillimeter Array (ALMA) to carry out a search for CO (3-2) or (4-3) emission from the fields of 12 high-metallicity ([M/H]...-0.72 dex) damped Lya absorbers (DLAs) at z approximate to 1.7-2.6. We detected CO emission from galaxies in the fields of five DLAs (two of which have been reported earlier), obtaining high molecular gas masses, M-mol approximate to (1.3-20.7) x (alpha C-O/4.36) x 10(10) M-circle dot. The impact parameters of the CO emitters to the QSO sight line lie in the range b similar to 5.6-100 kpc, with the three new CO detections having b less than or similar to 15 kpc. The highest CO line luminosities and inferred molecular gas masses are associated with the highest-metallicity DLAs, with [M/H] greater than or similar to -0.3 dex. The high inferred molecular gas masses may be explained by a combination of a stellar mass-metallicity relation and a high molecular gas-to-star mass ratio in high-redshift galaxies; the DLA galaxies identified by our CO searches have properties consistent with those of emission-selected samples. None of the DLA galaxies detected in CO emission were identified in earlier optical or near-IR searches and vice versa; DLA galaxies earlier identified in optical/near-IR searches were not detected in CO emission. The high ALMA CO and C[II] 158 mu m detection rate in high-z, high-metallicity DLA galaxies has revolutionized the field, allowing the identification of dusty, massive galaxies associated with high-z DLAs. The H I-absorption criterion identifying DLAs selects the entire high-z galaxy population, including dusty and UVbright galaxies, in a wide range of environments.",
keywords = "High-redshift galaxies, Damped Lyman-alpha systems, Molecular gas, LY-ALPHA SYSTEMS, DAMPED LYMAN, METALLICITY RELATION, METAL-RICH, BILLION YEARS, CO EMISSION, ABSORBER, MUSE, DLA",
author = "N. Kanekar and Prochaska, {J. X.} and M. Neeleman and L. Christensen and P. Moller and Zwaan, {M. A.} and Fynbo, {J. P. U.} and M. Dessauges-Zavadsky",
year = "2020",
month = sep,
day = "20",
doi = "10.3847/2041-8213/abb4e1",
language = "English",
volume = "901",
journal = "The Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - High Molecular Gas Masses in Absorption-selected Galaxies at z approximate to 2

AU - Kanekar, N.

AU - Prochaska, J. X.

AU - Neeleman, M.

AU - Christensen, L.

AU - Moller, P.

AU - Zwaan, M. A.

AU - Fynbo, J. P. U.

AU - Dessauges-Zavadsky, M.

PY - 2020/9/20

Y1 - 2020/9/20

N2 - We have used the Atacama Large Millimeter/submillimeter Array (ALMA) to carry out a search for CO (3-2) or (4-3) emission from the fields of 12 high-metallicity ([M/H]...-0.72 dex) damped Lya absorbers (DLAs) at z approximate to 1.7-2.6. We detected CO emission from galaxies in the fields of five DLAs (two of which have been reported earlier), obtaining high molecular gas masses, M-mol approximate to (1.3-20.7) x (alpha C-O/4.36) x 10(10) M-circle dot. The impact parameters of the CO emitters to the QSO sight line lie in the range b similar to 5.6-100 kpc, with the three new CO detections having b less than or similar to 15 kpc. The highest CO line luminosities and inferred molecular gas masses are associated with the highest-metallicity DLAs, with [M/H] greater than or similar to -0.3 dex. The high inferred molecular gas masses may be explained by a combination of a stellar mass-metallicity relation and a high molecular gas-to-star mass ratio in high-redshift galaxies; the DLA galaxies identified by our CO searches have properties consistent with those of emission-selected samples. None of the DLA galaxies detected in CO emission were identified in earlier optical or near-IR searches and vice versa; DLA galaxies earlier identified in optical/near-IR searches were not detected in CO emission. The high ALMA CO and C[II] 158 mu m detection rate in high-z, high-metallicity DLA galaxies has revolutionized the field, allowing the identification of dusty, massive galaxies associated with high-z DLAs. The H I-absorption criterion identifying DLAs selects the entire high-z galaxy population, including dusty and UVbright galaxies, in a wide range of environments.

AB - We have used the Atacama Large Millimeter/submillimeter Array (ALMA) to carry out a search for CO (3-2) or (4-3) emission from the fields of 12 high-metallicity ([M/H]...-0.72 dex) damped Lya absorbers (DLAs) at z approximate to 1.7-2.6. We detected CO emission from galaxies in the fields of five DLAs (two of which have been reported earlier), obtaining high molecular gas masses, M-mol approximate to (1.3-20.7) x (alpha C-O/4.36) x 10(10) M-circle dot. The impact parameters of the CO emitters to the QSO sight line lie in the range b similar to 5.6-100 kpc, with the three new CO detections having b less than or similar to 15 kpc. The highest CO line luminosities and inferred molecular gas masses are associated with the highest-metallicity DLAs, with [M/H] greater than or similar to -0.3 dex. The high inferred molecular gas masses may be explained by a combination of a stellar mass-metallicity relation and a high molecular gas-to-star mass ratio in high-redshift galaxies; the DLA galaxies identified by our CO searches have properties consistent with those of emission-selected samples. None of the DLA galaxies detected in CO emission were identified in earlier optical or near-IR searches and vice versa; DLA galaxies earlier identified in optical/near-IR searches were not detected in CO emission. The high ALMA CO and C[II] 158 mu m detection rate in high-z, high-metallicity DLA galaxies has revolutionized the field, allowing the identification of dusty, massive galaxies associated with high-z DLAs. The H I-absorption criterion identifying DLAs selects the entire high-z galaxy population, including dusty and UVbright galaxies, in a wide range of environments.

KW - High-redshift galaxies

KW - Damped Lyman-alpha systems

KW - Molecular gas

KW - LY-ALPHA SYSTEMS

KW - DAMPED LYMAN

KW - METALLICITY RELATION

KW - METAL-RICH

KW - BILLION YEARS

KW - CO EMISSION

KW - ABSORBER

KW - MUSE

KW - DLA

U2 - 10.3847/2041-8213/abb4e1

DO - 10.3847/2041-8213/abb4e1

M3 - Letter

VL - 901

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - 5

ER -

ID: 249905240