TY - JOUR
T1 - The Extended [CII] under Construction? Observation of the Brightest High-z Lensed Star-forming Galaxy at z=6.2
AU - Fudamoto, Yoshinobu
AU - Inoue, Akio K.
AU - Coe, Dan
AU - Welch, Brian
AU - Acebron, Ana
AU - Ricotti, Massimo
AU - Mandelker, Nir
AU - Windhorst, Rogier A.
AU - Xu, Xinfeng
AU - Sugahara, Yuma
AU - Bauer, Franz E.
AU - Bradač, Maruša
AU - Bradley, Larry D.
AU - Diego, Jose M.
AU - Florian, Michael
AU - Frye, Brenda
AU - Fujimoto, Seiji
AU - Hashimoto, Takuya
AU - Henry, Alaina
AU - Mahler, Guillaume
AU - Oesch, Pascal A.
AU - Ravindranath, Swara
AU - Rigby, Jane
AU - Sharon, Keren
AU - Strait, Victoria
AU - Tamura, Yoichi
AU - Trenti, Michele
AU - Vanzella, Eros
AU - Zackrisson, Erik
AU - Zitrin, Adi
N1 - Publisher Copyright:
© 2024. The Author(s).
PY - 2024/1/1
Y1 - 2024/1/1
N2 - We present results of [C II] 158 μm emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed (μ ∼ 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 ± 0.0002. The [C II] emission line is detected with a signal-to-noise ratio >6 within the rest-frame UV-bright clump of the lensed galaxy (zD1.1) and exhibits multiple velocity components; the narrow [C II] has a velocity full width half maximum (FWHM) of 110 ± 20 km s−1, while broader [C II] is seen with an FWHM of 230 ± 50 km s−1. The broader [C II] component is blueshifted (−80 ± 20 km s−1) with respect to the narrow [C II] component, and has a morphology that extends beyond the UV-bright clump. We find that, while the narrow [C II] emission is most likely associated with zD1.1, the broader component is possibly associated with a physically distinct gas component from zD1.1 (e.g., outflowing or inflowing gas). Based on the nondetection of λ158μm dust continuum, we find that MACS0308-zDl's star formation activity occurs in a dust-free environment indicated by a strong upper limit of infrared luminosity ≲9 × 108 Le. Targeting this strongly lensed faint galaxy for follow-up Atacama Large Millimeter/submillimeter Array and JWST observations will be crucial to characterize the details of typical galaxy growth in the early Universe.
AB - We present results of [C II] 158 μm emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed (μ ∼ 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 ± 0.0002. The [C II] emission line is detected with a signal-to-noise ratio >6 within the rest-frame UV-bright clump of the lensed galaxy (zD1.1) and exhibits multiple velocity components; the narrow [C II] has a velocity full width half maximum (FWHM) of 110 ± 20 km s−1, while broader [C II] is seen with an FWHM of 230 ± 50 km s−1. The broader [C II] component is blueshifted (−80 ± 20 km s−1) with respect to the narrow [C II] component, and has a morphology that extends beyond the UV-bright clump. We find that, while the narrow [C II] emission is most likely associated with zD1.1, the broader component is possibly associated with a physically distinct gas component from zD1.1 (e.g., outflowing or inflowing gas). Based on the nondetection of λ158μm dust continuum, we find that MACS0308-zDl's star formation activity occurs in a dust-free environment indicated by a strong upper limit of infrared luminosity ≲9 × 108 Le. Targeting this strongly lensed faint galaxy for follow-up Atacama Large Millimeter/submillimeter Array and JWST observations will be crucial to characterize the details of typical galaxy growth in the early Universe.
KW - Galaxy evolution (594)
KW - Galaxy formation (595)
KW - Gravitational lensing (670)
KW - Unified Astronomy Thesaurus concepts: High-redshift galaxies (734)
UR - http://www.scopus.com/inward/record.url?scp=85184495631&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85184495631&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ad0f95
DO - 10.3847/1538-4357/ad0f95
M3 - Article
AN - SCOPUS:85184495631
SN - 0004-637X
VL - 961
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 71
ER -