ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within

J. E. Geach; D. Narayanan; Y. Matsuda; M. Hayes; Ll Mas-Ribas; M. Dijkstra; C. C. Steidel; S. C. Chapman; R. Feldmann; A. Avison; O. Agertz; Y. Ao; M. Birkinshaw; M. N. Bremer; D. L. Clements; H. Dannerbauer; D. Farrah; C. M. Harrison; M. Kubo; M. J. Michałowski; Douglas Scott; D. J B Smith; M. Spaans; J. M. Simpson; A. M. Swinbank; Y. Taniguchi; P. Van Der Werf; A. Verma; T. Yamada

doi:10.3847/0004-637X/832/1/37

ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within

J. E. Geach, D. Narayanan, Y. Matsuda, M. Hayes, Ll Mas-Ribas, M. Dijkstra, C. C. Steidel, S. C. Chapman, R. Feldmann, A. Avison, O. Agertz, Y. Ao, M. Birkinshaw, M. N. Bremer, D. L. Clements, H. Dannerbauer, D. Farrah, C. M. Harrison, M. Kubo, M. J. MichałowskiDouglas Scott, D. J B Smith, M. Spaans, J. M. Simpson, A. M. Swinbank, Y. Taniguchi, P. Van Der Werf, A. Verma, T. Yamada

School of Physics

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Abstract

We present new Atacama Large Millimeter/Submillimeter Array (ALMA) 850um continuum observations of the original Lyman-α Blob (LAB) in the SSA22 field at z=3.1 (SSA22-LAB01). The ALMA map resolves the previously identified submillimeter source into three components with total flux density S₈₅₀ = 1.68+/-0.06 mJy, corresponding to a star formation rate of ~150 M_⊙yr^-1. The submillimeter sources are associated with several faint (m≈27 mag) rest-frame ultraviolet sources identified in Hubble Space Telescope Imaging Spectrograph (STIS) clear filter imaging (λ≈5850Å). One of these companions is spectroscopically confirmed with Keck MOSFIRE to lie within 20 projected kpc and 250 kms^-1 of one of the ALMA components. We postulate that some of these STIS sources represent a population of low-mass star-forming satellites surrounding the central submillimeter sources, potentially contributing to their growth and activity through accretion. Using a high resolution cosmological zoom simulation of a 10¹³M_⊙ halo at z=3, including stellar, dust and Lyα radiative transfer, we can model the ALMA+STIS observations and demonstrate that Lyα photons escaping from the central submillimeter sources are expected to resonantly scatter in neutral hydrogen, the majority of which is predicted to be associated with halo substructure. We show how this process gives rise to extended Lyα emission with similar surface brightness and morphology to observed giant LABs.

Original language	English
Article number	37
Number of pages	7
Journal	Astrophysical Journal
Volume	832
Issue number	1
Early online date	8 Nov 2016
DOIs	https://doi.org/10.3847/0004-637X/832/1/37
Publication status	Published - 20 Nov 2016

Keywords

astro-ph.GA
astro-ph.CO
galaxies
evolution – galaxies
high-redshift – galaxies
halos

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Geach, J. E., Narayanan, D., Matsuda, Y., Hayes, M., Mas-Ribas, L., Dijkstra, M., Steidel, C. C., Chapman, S. C., Feldmann, R., Avison, A., Agertz, O., Ao, Y., Birkinshaw, M., Bremer, M. N., Clements, D. L., Dannerbauer, H., Farrah, D., Harrison, C. M., Kubo, M., ... Yamada, T. (2016). ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within. Astrophysical Journal, 832(1), [37]. https://doi.org/10.3847/0004-637X/832/1/37

Geach, J. E. ; Narayanan, D. ; Matsuda, Y. ; Hayes, M. ; Mas-Ribas, Ll ; Dijkstra, M. ; Steidel, C. C. ; Chapman, S. C. ; Feldmann, R. ; Avison, A. ; Agertz, O. ; Ao, Y. ; Birkinshaw, M. ; Bremer, M. N. ; Clements, D. L. ; Dannerbauer, H. ; Farrah, D. ; Harrison, C. M. ; Kubo, M. ; Michałowski, M. J. ; Scott, Douglas ; Smith, D. J B ; Spaans, M. ; Simpson, J. M. ; Swinbank, A. M. ; Taniguchi, Y. ; Werf, P. Van Der ; Verma, A. ; Yamada, T. / ALMA observations of Lyman-α Blob 1 : halo sub-structure illuminated from within. In: Astrophysical Journal. 2016 ; Vol. 832, No. 1.

@article{c8f3521efa064a47a607912819694ddf,

title = "ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within",

abstract = "We present new Atacama Large Millimeter/Submillimeter Array (ALMA) 850um continuum observations of the original Lyman-α Blob (LAB) in the SSA22 field at z=3.1 (SSA22-LAB01). The ALMA map resolves the previously identified submillimeter source into three components with total flux density S850 = 1.68+/-0.06 mJy, corresponding to a star formation rate of ~150 M⊙yr-1. The submillimeter sources are associated with several faint (m≈27 mag) rest-frame ultraviolet sources identified in Hubble Space Telescope Imaging Spectrograph (STIS) clear filter imaging (λ≈5850{\AA}). One of these companions is spectroscopically confirmed with Keck MOSFIRE to lie within 20 projected kpc and 250 kms-1 of one of the ALMA components. We postulate that some of these STIS sources represent a population of low-mass star-forming satellites surrounding the central submillimeter sources, potentially contributing to their growth and activity through accretion. Using a high resolution cosmological zoom simulation of a 1013M⊙ halo at z=3, including stellar, dust and Lyα radiative transfer, we can model the ALMA+STIS observations and demonstrate that Lyα photons escaping from the central submillimeter sources are expected to resonantly scatter in neutral hydrogen, the majority of which is predicted to be associated with halo substructure. We show how this process gives rise to extended Lyα emission with similar surface brightness and morphology to observed giant LABs.",

keywords = "astro-ph.GA, astro-ph.CO, galaxies, evolution – galaxies, high-redshift – galaxies, halos",

author = "Geach, {J. E.} and D. Narayanan and Y. Matsuda and M. Hayes and Ll Mas-Ribas and M. Dijkstra and Steidel, {C. C.} and Chapman, {S. C.} and R. Feldmann and A. Avison and O. Agertz and Y. Ao and M. Birkinshaw and Bremer, {M. N.} and Clements, {D. L.} and H. Dannerbauer and D. Farrah and Harrison, {C. M.} and M. Kubo and Micha{\l}owski, {M. J.} and Douglas Scott and Smith, {D. J B} and M. Spaans and Simpson, {J. M.} and Swinbank, {A. M.} and Y. Taniguchi and Werf, {P. Van Der} and A. Verma and T. Yamada",

year = "2016",

month = nov,

day = "20",

doi = "10.3847/0004-637X/832/1/37",

language = "English",

volume = "832",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Geach, JE, Narayanan, D, Matsuda, Y, Hayes, M, Mas-Ribas, L, Dijkstra, M, Steidel, CC, Chapman, SC, Feldmann, R, Avison, A, Agertz, O, Ao, Y, Birkinshaw, M , Bremer, MN, Clements, DL, Dannerbauer, H, Farrah, D, Harrison, CM, Kubo, M, Michałowski, MJ, Scott, D, Smith, DJB, Spaans, M, Simpson, JM, Swinbank, AM, Taniguchi, Y, Werf, PVD, Verma, A & Yamada, T 2016, 'ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within', Astrophysical Journal, vol. 832, no. 1, 37. https://doi.org/10.3847/0004-637X/832/1/37

ALMA observations of Lyman-α Blob 1 : halo sub-structure illuminated from within. / Geach, J. E.; Narayanan, D.; Matsuda, Y.; Hayes, M.; Mas-Ribas, Ll; Dijkstra, M.; Steidel, C. C.; Chapman, S. C.; Feldmann, R.; Avison, A.; Agertz, O.; Ao, Y.; Birkinshaw, M.; Bremer, M. N.; Clements, D. L.; Dannerbauer, H.; Farrah, D.; Harrison, C. M.; Kubo, M.; Michałowski, M. J.; Scott, Douglas; Smith, D. J B; Spaans, M.; Simpson, J. M.; Swinbank, A. M.; Taniguchi, Y.; Werf, P. Van Der; Verma, A.; Yamada, T.

In: Astrophysical Journal, Vol. 832, No. 1, 37, 20.11.2016.

Research output: Contribution to journal › Article (Academic Journal) › peer-review

TY - JOUR

T1 - ALMA observations of Lyman-α Blob 1

T2 - halo sub-structure illuminated from within

AU - Geach, J. E.

AU - Narayanan, D.

AU - Matsuda, Y.

AU - Hayes, M.

AU - Mas-Ribas, Ll

AU - Dijkstra, M.

AU - Steidel, C. C.

AU - Chapman, S. C.

AU - Feldmann, R.

AU - Avison, A.

AU - Agertz, O.

AU - Ao, Y.

AU - Birkinshaw, M.

AU - Bremer, M. N.

AU - Clements, D. L.

AU - Dannerbauer, H.

AU - Farrah, D.

AU - Harrison, C. M.

AU - Kubo, M.

AU - Michałowski, M. J.

AU - Scott, Douglas

AU - Smith, D. J B

AU - Spaans, M.

AU - Simpson, J. M.

AU - Swinbank, A. M.

AU - Taniguchi, Y.

AU - Werf, P. Van Der

AU - Verma, A.

AU - Yamada, T.

PY - 2016/11/20

Y1 - 2016/11/20

N2 - We present new Atacama Large Millimeter/Submillimeter Array (ALMA) 850um continuum observations of the original Lyman-α Blob (LAB) in the SSA22 field at z=3.1 (SSA22-LAB01). The ALMA map resolves the previously identified submillimeter source into three components with total flux density S850 = 1.68+/-0.06 mJy, corresponding to a star formation rate of ~150 M⊙yr-1. The submillimeter sources are associated with several faint (m≈27 mag) rest-frame ultraviolet sources identified in Hubble Space Telescope Imaging Spectrograph (STIS) clear filter imaging (λ≈5850Å). One of these companions is spectroscopically confirmed with Keck MOSFIRE to lie within 20 projected kpc and 250 kms-1 of one of the ALMA components. We postulate that some of these STIS sources represent a population of low-mass star-forming satellites surrounding the central submillimeter sources, potentially contributing to their growth and activity through accretion. Using a high resolution cosmological zoom simulation of a 1013M⊙ halo at z=3, including stellar, dust and Lyα radiative transfer, we can model the ALMA+STIS observations and demonstrate that Lyα photons escaping from the central submillimeter sources are expected to resonantly scatter in neutral hydrogen, the majority of which is predicted to be associated with halo substructure. We show how this process gives rise to extended Lyα emission with similar surface brightness and morphology to observed giant LABs.

AB - We present new Atacama Large Millimeter/Submillimeter Array (ALMA) 850um continuum observations of the original Lyman-α Blob (LAB) in the SSA22 field at z=3.1 (SSA22-LAB01). The ALMA map resolves the previously identified submillimeter source into three components with total flux density S850 = 1.68+/-0.06 mJy, corresponding to a star formation rate of ~150 M⊙yr-1. The submillimeter sources are associated with several faint (m≈27 mag) rest-frame ultraviolet sources identified in Hubble Space Telescope Imaging Spectrograph (STIS) clear filter imaging (λ≈5850Å). One of these companions is spectroscopically confirmed with Keck MOSFIRE to lie within 20 projected kpc and 250 kms-1 of one of the ALMA components. We postulate that some of these STIS sources represent a population of low-mass star-forming satellites surrounding the central submillimeter sources, potentially contributing to their growth and activity through accretion. Using a high resolution cosmological zoom simulation of a 1013M⊙ halo at z=3, including stellar, dust and Lyα radiative transfer, we can model the ALMA+STIS observations and demonstrate that Lyα photons escaping from the central submillimeter sources are expected to resonantly scatter in neutral hydrogen, the majority of which is predicted to be associated with halo substructure. We show how this process gives rise to extended Lyα emission with similar surface brightness and morphology to observed giant LABs.

KW - astro-ph.GA

KW - astro-ph.CO

KW - galaxies

KW - evolution – galaxies

KW - high-redshift – galaxies

KW - halos

UR - http://www.scopus.com/inward/record.url?scp=84996525895&partnerID=8YFLogxK

U2 - 10.3847/0004-637X/832/1/37

DO - 10.3847/0004-637X/832/1/37

M3 - Article (Academic Journal)

VL - 832

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 37

ER -

ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within

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Fingerprint Dive into the research topics of 'ALMA observations of Lyman-α Blob 1: halo sub-structure illuminated from within'. Together they form a unique fingerprint.

Research in planetary formation, astrophysics, and cosmology at Bristol

Cite this