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    Rights statement: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version David Sobral, Jorryt Matthee, Gabriel Brammer, Andrea Ferrara, Lara Alegre, Huub Röttgering, Daniel Schaerer, Bahram Mobasher, Behnam Darvish; On the nature and physical conditions of the luminous Ly α emitter CR7 and its rest-frame UV components, Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 2, 11 January 2019, Pages 2422–2441, https://doi.org/10.1093/mnras/sty2779 is available online at: https://academic.oup.com/mnras/article/482/2/2422/5144221

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On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components

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On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components. / Sobral, David; Matthee, Jorryt; Brammer, Gabriel; Ferrara, Andrea; Alegre, Lara; Röttgering, Huub; Schaerer, Daniel; Mobasher, Bahram; Darvish, Behnam.

In: Monthly Notices of the Royal Astronomical Society, Vol. 482, No. 2, 11.01.2019, p. 2422-2441.

Research output: Contribution to journalJournal article

Harvard

Sobral, D, Matthee, J, Brammer, G, Ferrara, A, Alegre, L, Röttgering, H, Schaerer, D, Mobasher, B & Darvish, B 2019, 'On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components', Monthly Notices of the Royal Astronomical Society, vol. 482, no. 2, pp. 2422-2441. https://doi.org/10.1093/mnras/sty2779

APA

Sobral, D., Matthee, J., Brammer, G., Ferrara, A., Alegre, L., Röttgering, H., ... Darvish, B. (2019). On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components. Monthly Notices of the Royal Astronomical Society, 482(2), 2422-2441. https://doi.org/10.1093/mnras/sty2779

Vancouver

Sobral D, Matthee J, Brammer G, Ferrara A, Alegre L, Röttgering H et al. On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components. Monthly Notices of the Royal Astronomical Society. 2019 Jan 11;482(2):2422-2441. https://doi.org/10.1093/mnras/sty2779

Author

Sobral, David ; Matthee, Jorryt ; Brammer, Gabriel ; Ferrara, Andrea ; Alegre, Lara ; Röttgering, Huub ; Schaerer, Daniel ; Mobasher, Bahram ; Darvish, Behnam. / On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components. In: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 482, No. 2. pp. 2422-2441.

Bibtex

@article{1a5cbb4ab68240f09ef1276a2ef23e41,
title = "On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components",
abstract = "We present new Hubble Space Telescope (HST)/WFC3 observations and re-analyse VLT data to unveil the continuum, variability, and rest-frame ultraviolet (UV) lines of the multiple UV clumps of the most luminous Ly alpha emitter at z = 6.6, CR7 (COSMOS Redshift 7). Our re-reduced, flux-calibrated X-SHOOTER spectra of CR7 reveal an HeII emission line in observations obtained along the major axis of Ly alpha emission with the best seeing conditions. He II is spatially offset by approximate to+ 0.8 arcsec from the peak of Ly alpha emission, and it is found towards clump B. Our WFC3 grism spectra detects the UV continuum of CR7' s clump A, yielding a power law with beta = -2.5(-0.7) (+ 0.6) and M-UV = -21.87(-0.20) (+ 0.25) . No significant variability is found for any of the UV clumps on their own, but there is tentative (approximate to 2.2 sigma) brightening of CR7 in F110W as a whole from 2012 to 2017. HST grism data fail to robustly detect rest-frame UV lines in any of the clumps, implying fluxes less than or similar to 2 x 10(-17) erg s(-1) cm(-2) (3 sigma). We perform CLOUDY modelling to constrain the metallicity and the ionizing nature of CR7. CR7 seems to be actively forming stars without any clear active galactic nucleus activity in clump A, consistent with a metallicity of similar to 0.05-0.2 Z(circle dot). Component C or an interclump component between B and C may host a high ionization source. Our results highlight the need for spatially resolved information to study the formation and assembly of early galaxies.",
keywords = "astro-ph.GA, astro-ph.CO",
author = "David Sobral and Jorryt Matthee and Gabriel Brammer and Andrea Ferrara and Lara Alegre and Huub R{\"o}ttgering and Daniel Schaerer and Bahram Mobasher and Behnam Darvish",
note = "This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version David Sobral, Jorryt Matthee, Gabriel Brammer, Andrea Ferrara, Lara Alegre, Huub R{\"o}ttgering, Daniel Schaerer, Bahram Mobasher, Behnam Darvish; On the nature and physical conditions of the luminous Ly α emitter CR7 and its rest-frame UV components, Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 2, 11 January 2019, Pages 2422–2441, https://doi.org/10.1093/mnras/sty2779 is available online at: https://academic.oup.com/mnras/article/482/2/2422/5144221",
year = "2019",
month = "1",
day = "11",
doi = "10.1093/mnras/sty2779",
language = "English",
volume = "482",
pages = "2422--2441",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - On the nature and physical conditions of the luminous Lyα emitter CR7 and its rest-frame UV components

AU - Sobral, David

AU - Matthee, Jorryt

AU - Brammer, Gabriel

AU - Ferrara, Andrea

AU - Alegre, Lara

AU - Röttgering, Huub

AU - Schaerer, Daniel

AU - Mobasher, Bahram

AU - Darvish, Behnam

N1 - This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version David Sobral, Jorryt Matthee, Gabriel Brammer, Andrea Ferrara, Lara Alegre, Huub Röttgering, Daniel Schaerer, Bahram Mobasher, Behnam Darvish; On the nature and physical conditions of the luminous Ly α emitter CR7 and its rest-frame UV components, Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 2, 11 January 2019, Pages 2422–2441, https://doi.org/10.1093/mnras/sty2779 is available online at: https://academic.oup.com/mnras/article/482/2/2422/5144221

PY - 2019/1/11

Y1 - 2019/1/11

N2 - We present new Hubble Space Telescope (HST)/WFC3 observations and re-analyse VLT data to unveil the continuum, variability, and rest-frame ultraviolet (UV) lines of the multiple UV clumps of the most luminous Ly alpha emitter at z = 6.6, CR7 (COSMOS Redshift 7). Our re-reduced, flux-calibrated X-SHOOTER spectra of CR7 reveal an HeII emission line in observations obtained along the major axis of Ly alpha emission with the best seeing conditions. He II is spatially offset by approximate to+ 0.8 arcsec from the peak of Ly alpha emission, and it is found towards clump B. Our WFC3 grism spectra detects the UV continuum of CR7' s clump A, yielding a power law with beta = -2.5(-0.7) (+ 0.6) and M-UV = -21.87(-0.20) (+ 0.25) . No significant variability is found for any of the UV clumps on their own, but there is tentative (approximate to 2.2 sigma) brightening of CR7 in F110W as a whole from 2012 to 2017. HST grism data fail to robustly detect rest-frame UV lines in any of the clumps, implying fluxes less than or similar to 2 x 10(-17) erg s(-1) cm(-2) (3 sigma). We perform CLOUDY modelling to constrain the metallicity and the ionizing nature of CR7. CR7 seems to be actively forming stars without any clear active galactic nucleus activity in clump A, consistent with a metallicity of similar to 0.05-0.2 Z(circle dot). Component C or an interclump component between B and C may host a high ionization source. Our results highlight the need for spatially resolved information to study the formation and assembly of early galaxies.

AB - We present new Hubble Space Telescope (HST)/WFC3 observations and re-analyse VLT data to unveil the continuum, variability, and rest-frame ultraviolet (UV) lines of the multiple UV clumps of the most luminous Ly alpha emitter at z = 6.6, CR7 (COSMOS Redshift 7). Our re-reduced, flux-calibrated X-SHOOTER spectra of CR7 reveal an HeII emission line in observations obtained along the major axis of Ly alpha emission with the best seeing conditions. He II is spatially offset by approximate to+ 0.8 arcsec from the peak of Ly alpha emission, and it is found towards clump B. Our WFC3 grism spectra detects the UV continuum of CR7' s clump A, yielding a power law with beta = -2.5(-0.7) (+ 0.6) and M-UV = -21.87(-0.20) (+ 0.25) . No significant variability is found for any of the UV clumps on their own, but there is tentative (approximate to 2.2 sigma) brightening of CR7 in F110W as a whole from 2012 to 2017. HST grism data fail to robustly detect rest-frame UV lines in any of the clumps, implying fluxes less than or similar to 2 x 10(-17) erg s(-1) cm(-2) (3 sigma). We perform CLOUDY modelling to constrain the metallicity and the ionizing nature of CR7. CR7 seems to be actively forming stars without any clear active galactic nucleus activity in clump A, consistent with a metallicity of similar to 0.05-0.2 Z(circle dot). Component C or an interclump component between B and C may host a high ionization source. Our results highlight the need for spatially resolved information to study the formation and assembly of early galaxies.

KW - astro-ph.GA

KW - astro-ph.CO

U2 - 10.1093/mnras/sty2779

DO - 10.1093/mnras/sty2779

M3 - Journal article

VL - 482

SP - 2422

EP - 2441

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -