Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2

Michael V. Maseda; Arjen Van Der Wel; Elisabete Da Cunha; Hans Walter Rix; Camilla Pacifici; Ivelina Momcheva; Gabriel B. Brammer; Marijn Franx; Pieter Van Dokkum; Eric F. Bell; Mattia Fumagalli; Norman A. Grogin; Dale D. Kocevski; Anton M. Koekemoer; Britt F. Lundgren; Danilo Marchesini; Erica J. Nelson; Shannon G. Patel; Rosalind E. Skelton; Amber N. Straughn; Jonathan R. Trump; Benjamin J. Weiner; Katherine E. Whitaker; Stijn Wuyts

doi:10.1088/2041-8205/778/1/L22

Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2

Michael V. Maseda, Arjen Van Der Wel, Elisabete Da Cunha, Hans Walter Rix, Camilla Pacifici, Ivelina Momcheva, Gabriel B. Brammer, Marijn Franx, Pieter Van Dokkum, Eric F. Bell, Mattia Fumagalli, Norman A. Grogin, Dale D. Kocevski, Anton M. Koekemoer, Britt F. Lundgren, Danilo Marchesini, Erica J. Nelson, Shannon G. Patel, Rosalind E. Skelton, Amber N. StraughnJonathan R. Trump, Benjamin J. Weiner, Katherine E. Whitaker, Stijn Wuyts

Multiple Mirror Telescope Observatory

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

45 Scopus citations

Abstract

Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (∼50 km s^-1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (≲ 3 × 10⁹ M_⊙). Their large [O III] λ 5007 equivalent widths (500-1100 Å) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 10 ⁸-10⁹ M _⊙, confirming the presence of a violent starburst. The dynamical masses represent the first such determinations for low-mass galaxies at z > 1. The stellar mass formed in this vigorous starburst phase represents a large fraction of the total (dynamical) mass, without a significantly massive underlying population of older stars. The occurrence of such intense events in shallow potentials strongly suggests that supernova-driven winds must be of critical importance in the subsequent evolution of these systems.

Original language	English (US)
Article number	L22
Journal	Astrophysical Journal Letters
Volume	778
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/778/1/L22
State	Published - Nov 20 2013

Keywords

galaxies: dwarf
galaxies: evolution
galaxies: formation
galaxies: high-redshift
galaxies: starburst

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/778/1/L22

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Maseda, M. V., Van Der Wel, A., Da Cunha, E., Rix, H. W., Pacifici, C., Momcheva, I., Brammer, G. B., Franx, M., Van Dokkum, P., Bell, E. F., Fumagalli, M., Grogin, N. A., Kocevski, D. D., Koekemoer, A. M., Lundgren, B. F., Marchesini, D., Nelson, E. J., Patel, S. G., Skelton, R. E., ... Wuyts, S. (2013). Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2. Astrophysical Journal Letters, 778(1), Article L22. https://doi.org/10.1088/2041-8205/778/1/L22

Maseda, MV, Van Der Wel, A, Da Cunha, E, Rix, HW, Pacifici, C, Momcheva, I, Brammer, GB, Franx, M, Van Dokkum, P, Bell, EF, Fumagalli, M, Grogin, NA, Kocevski, DD, Koekemoer, AM, Lundgren, BF, Marchesini, D, Nelson, EJ, Patel, SG, Skelton, RE, Straughn, AN, Trump, JR, Weiner, BJ, Whitaker, KE & Wuyts, S 2013, 'Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2', Astrophysical Journal Letters, vol. 778, no. 1, L22. https://doi.org/10.1088/2041-8205/778/1/L22

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title = "Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2",

abstract = "Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (∼50 km s-1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (≲ 3 × 109 M⊙). Their large [O III] λ 5007 equivalent widths (500-1100 {\AA}) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 10 8-109 M ⊙, confirming the presence of a violent starburst. The dynamical masses represent the first such determinations for low-mass galaxies at z > 1. The stellar mass formed in this vigorous starburst phase represents a large fraction of the total (dynamical) mass, without a significantly massive underlying population of older stars. The occurrence of such intense events in shallow potentials strongly suggests that supernova-driven winds must be of critical importance in the subsequent evolution of these systems.",

keywords = "galaxies: dwarf, galaxies: evolution, galaxies: formation, galaxies: high-redshift, galaxies: starburst",

author = "Maseda, {Michael V.} and {Van Der Wel}, Arjen and {Da Cunha}, Elisabete and Rix, {Hans Walter} and Camilla Pacifici and Ivelina Momcheva and Brammer, {Gabriel B.} and Marijn Franx and {Van Dokkum}, Pieter and Bell, {Eric F.} and Mattia Fumagalli and Grogin, {Norman A.} and Kocevski, {Dale D.} and Koekemoer, {Anton M.} and Lundgren, {Britt F.} and Danilo Marchesini and Nelson, {Erica J.} and Patel, {Shannon G.} and Skelton, {Rosalind E.} and Straughn, {Amber N.} and Trump, {Jonathan R.} and Weiner, {Benjamin J.} and Whitaker, {Katherine E.} and Stijn Wuyts",

year = "2013",

month = nov,

day = "20",

doi = "10.1088/2041-8205/778/1/L22",

language = "English (US)",

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journal = "Astrophysical Journal Letters",

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T1 - Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2

AU - Maseda, Michael V.

AU - Van Der Wel, Arjen

AU - Da Cunha, Elisabete

AU - Rix, Hans Walter

AU - Pacifici, Camilla

AU - Momcheva, Ivelina

AU - Brammer, Gabriel B.

AU - Franx, Marijn

AU - Van Dokkum, Pieter

AU - Bell, Eric F.

AU - Fumagalli, Mattia

AU - Grogin, Norman A.

AU - Kocevski, Dale D.

AU - Koekemoer, Anton M.

AU - Lundgren, Britt F.

AU - Marchesini, Danilo

AU - Nelson, Erica J.

AU - Patel, Shannon G.

AU - Skelton, Rosalind E.

AU - Straughn, Amber N.

AU - Trump, Jonathan R.

AU - Weiner, Benjamin J.

AU - Whitaker, Katherine E.

AU - Wuyts, Stijn

PY - 2013/11/20

Y1 - 2013/11/20

N2 - Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (∼50 km s-1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (≲ 3 × 109 M⊙). Their large [O III] λ 5007 equivalent widths (500-1100 Å) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 10 8-109 M ⊙, confirming the presence of a violent starburst. The dynamical masses represent the first such determinations for low-mass galaxies at z > 1. The stellar mass formed in this vigorous starburst phase represents a large fraction of the total (dynamical) mass, without a significantly massive underlying population of older stars. The occurrence of such intense events in shallow potentials strongly suggests that supernova-driven winds must be of critical importance in the subsequent evolution of these systems.

AB - Spectroscopic observations from the Large Binocular Telescope and the Very Large Telescope reveal kinematically narrow lines (∼50 km s-1) for a sample of 14 extreme emission line galaxies at redshifts 1.4 < z < 2.3. These measurements imply that the total dynamical masses of these systems are low (≲ 3 × 109 M⊙). Their large [O III] λ 5007 equivalent widths (500-1100 Å) and faint blue continuum emission imply young ages of 10-100 Myr and stellar masses of 10 8-109 M ⊙, confirming the presence of a violent starburst. The dynamical masses represent the first such determinations for low-mass galaxies at z > 1. The stellar mass formed in this vigorous starburst phase represents a large fraction of the total (dynamical) mass, without a significantly massive underlying population of older stars. The occurrence of such intense events in shallow potentials strongly suggests that supernova-driven winds must be of critical importance in the subsequent evolution of these systems.

KW - galaxies: dwarf

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high-redshift

KW - galaxies: starburst

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SN - 2041-8205

VL - 778

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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M1 - L22

ER -

Confirmation of small dynamical and stellar masses for extreme emission line galaxies at z ∼ 2

Abstract

Keywords

ASJC Scopus subject areas

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