On the origin of Lyα blobs at high redshift: Kinematic evidence of a hyperwind galaxy at z = 3.1

Youichi Ohyama; Yoshiaki Taniguchi; Koji S. Kawabata; Yasuhiro Shioya; Takashi Murayama; Tohru Nagao; Tadafumi Takata; I. Y.E. Masanori; Michitoshi Yoshida

doi:10.1086/376959

On the origin of Lyα blobs at high redshift: Kinematic evidence of a hyperwind galaxy at z = 3.1

Youichi Ohyama, Yoshiaki Taniguchi, Koji S. Kawabata, Yasuhiro Shioya, Takashi Murayama, Tohru Nagao, Tadafumi Takata, I. Y.E. Masanori, Michitoshi Yoshida

SCI - Astronomy

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49 Citations (Scopus)

Abstract

We present deep optical spectroscopy of an extended Lyα emission-line blob located in an overdense region at redshift z ≈ 3.1 ("blob 1" of Steidel et al.). The origin of such Lyα blobs has been debated for some time; two of the most plausible models are (1) that it comes from a dust-enshrouded, extreme starburst galaxy with a large-scale galactic outflow (superwind/hyperwind) or (2) that it is the cooling radiation of protogalaxies in dark matter halos. Examination of the kinematic properties of the Lyα emission-line gas should allow us to determine its nature. With this motivation, we performed optical spectroscopy on blob 1 using the Subaru Telescope and found that its kinematic properties can be well explained in terms of superwind activity.

Original language	English
Pages (from-to)	L9-L12
Journal	Astrophysical Journal
Volume	591
Issue number	1 II
DOIs	https://doi.org/10.1086/376959
Publication status	Published - 2003 Jul 1

Keywords

Galaxies: evolution
Galaxies: formation
Galaxies: starburst

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10.1086/376959

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title = "On the origin of Lyα blobs at high redshift: Kinematic evidence of a hyperwind galaxy at z = 3.1",

abstract = "We present deep optical spectroscopy of an extended Lyα emission-line blob located in an overdense region at redshift z ≈ 3.1 ({"}blob 1{"} of Steidel et al.). The origin of such Lyα blobs has been debated for some time; two of the most plausible models are (1) that it comes from a dust-enshrouded, extreme starburst galaxy with a large-scale galactic outflow (superwind/hyperwind) or (2) that it is the cooling radiation of protogalaxies in dark matter halos. Examination of the kinematic properties of the Lyα emission-line gas should allow us to determine its nature. With this motivation, we performed optical spectroscopy on blob 1 using the Subaru Telescope and found that its kinematic properties can be well explained in terms of superwind activity.",

keywords = "Galaxies: evolution, Galaxies: formation, Galaxies: starburst",

author = "Youichi Ohyama and Yoshiaki Taniguchi and Kawabata, {Koji S.} and Yasuhiro Shioya and Takashi Murayama and Tohru Nagao and Tadafumi Takata and Masanori, {I. Y.E.} and Michitoshi Yoshida",

note = "Funding Information: Y. S. was a JSPS fellow. This work was financially supported in part by the Ministry of Education, Science, and Culture, Japan (10044052 and 10304013).",

year = "2003",

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doi = "10.1086/376959",

language = "English",

volume = "591",

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T1 - On the origin of Lyα blobs at high redshift

T2 - Kinematic evidence of a hyperwind galaxy at z = 3.1

AU - Ohyama, Youichi

AU - Taniguchi, Yoshiaki

AU - Kawabata, Koji S.

AU - Shioya, Yasuhiro

AU - Murayama, Takashi

AU - Nagao, Tohru

AU - Takata, Tadafumi

AU - Masanori, I. Y.E.

AU - Yoshida, Michitoshi

N1 - Funding Information: Y. S. was a JSPS fellow. This work was financially supported in part by the Ministry of Education, Science, and Culture, Japan (10044052 and 10304013).

PY - 2003/7/1

Y1 - 2003/7/1

N2 - We present deep optical spectroscopy of an extended Lyα emission-line blob located in an overdense region at redshift z ≈ 3.1 ("blob 1" of Steidel et al.). The origin of such Lyα blobs has been debated for some time; two of the most plausible models are (1) that it comes from a dust-enshrouded, extreme starburst galaxy with a large-scale galactic outflow (superwind/hyperwind) or (2) that it is the cooling radiation of protogalaxies in dark matter halos. Examination of the kinematic properties of the Lyα emission-line gas should allow us to determine its nature. With this motivation, we performed optical spectroscopy on blob 1 using the Subaru Telescope and found that its kinematic properties can be well explained in terms of superwind activity.

AB - We present deep optical spectroscopy of an extended Lyα emission-line blob located in an overdense region at redshift z ≈ 3.1 ("blob 1" of Steidel et al.). The origin of such Lyα blobs has been debated for some time; two of the most plausible models are (1) that it comes from a dust-enshrouded, extreme starburst galaxy with a large-scale galactic outflow (superwind/hyperwind) or (2) that it is the cooling radiation of protogalaxies in dark matter halos. Examination of the kinematic properties of the Lyα emission-line gas should allow us to determine its nature. With this motivation, we performed optical spectroscopy on blob 1 using the Subaru Telescope and found that its kinematic properties can be well explained in terms of superwind activity.

KW - Galaxies: evolution

KW - Galaxies: formation

KW - Galaxies: starburst

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

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On the origin of Lyα blobs at high redshift: Kinematic evidence of a hyperwind galaxy at z = 3.1

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Keywords

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