TY - JOUR

T1 - The Ly alpha, C iv, and He ii nebulae around J1000+0234

T2 - a galaxy pair at the centre of a galaxy overdensity at z=4.5

AU - Jimenez-Andrade, E. F.

AU - Cantalupo, S.

AU - Magnelli, B.

AU - Romano-Diaz, E.

AU - Gomez-Guijarro, C.

AU - Mackenzie, R.

AU - Smolcic, V.

AU - Murphy, E.

AU - Matthee, J.

AU - Toft, S.

PY - 2023/3/14

Y1 - 2023/3/14

N2 - L y alpha A.1216 (L y alpha) emission extending over > 10 kilo parsec (kpc) around dusty, massive starbursts at z > 3 might represent a short-lived phase in the evolution of present-day, massive quiescent galaxies. To obtain empirical constraints on this emerging scenario, we present Ly alpha, C IV A.1550 (C IV ), and He II A.1640 (He II ) observations taken with the Multi-Unit Spectroscopic Explorer towards J1000 + 0234: a galaxy pair at z = 4.5 composed of a low-mass starburst (J1000 +0234-South) neighbouring a massive Submillimeter Galaxy (SMG; J1000 + 0234 -North) that harbours a rotationally supported gas disc. Based on the spatial distribution and relative strength of Ly alpha, C IV , and He II , we find that star formation in J1000 + 0234 -South and an active galactic nucleus in J1000 + 0234 -North are dominant factors in driving the observed 40 kiloparsec-scale Ly alpha blob (LAB). We use the non-resonant He II line to infer kinematic information of the LAB. We find marginal evidence for two spatially and spectrally separated He II regions, which suggests that the tw o-peak ed Ly alpha profile is mainly a result of two o v erlapping and likely interacting H I clouds. We also report the serendipitous identification of three Ly alpha emitters spanning over a redshift bin delta z

AB - L y alpha A.1216 (L y alpha) emission extending over > 10 kilo parsec (kpc) around dusty, massive starbursts at z > 3 might represent a short-lived phase in the evolution of present-day, massive quiescent galaxies. To obtain empirical constraints on this emerging scenario, we present Ly alpha, C IV A.1550 (C IV ), and He II A.1640 (He II ) observations taken with the Multi-Unit Spectroscopic Explorer towards J1000 + 0234: a galaxy pair at z = 4.5 composed of a low-mass starburst (J1000 +0234-South) neighbouring a massive Submillimeter Galaxy (SMG; J1000 + 0234 -North) that harbours a rotationally supported gas disc. Based on the spatial distribution and relative strength of Ly alpha, C IV , and He II , we find that star formation in J1000 + 0234 -South and an active galactic nucleus in J1000 + 0234 -North are dominant factors in driving the observed 40 kiloparsec-scale Ly alpha blob (LAB). We use the non-resonant He II line to infer kinematic information of the LAB. We find marginal evidence for two spatially and spectrally separated He II regions, which suggests that the tw o-peak ed Ly alpha profile is mainly a result of two o v erlapping and likely interacting H I clouds. We also report the serendipitous identification of three Ly alpha emitters spanning over a redshift bin delta z

KW - galaxies: evolution

KW - galaxies: high

KW - redshift

KW - galaxies:individual:J1000+0234

KW - galaxies:intergalacticmedium

KW - STAR-FORMING GALAXIES

KW - REDSHIFT RADIO GALAXIES

KW - ACTIVE GALACTIC NUCLEI

KW - GHZ LARGE PROJECT

KW - SIMILAR-TO 10

KW - SUBMILLIMETER GALAXIES

KW - CONTINUUM EMISSION

KW - ALMA OBSERVATIONS

KW - LINE-PROFILE

KW - BLACK-HOLES

U2 - 10.1093/mnras/stad594

DO - 10.1093/mnras/stad594

M3 - Journal article

VL - 521

SP - 2326

EP - 2341

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

SN - 0035-8711

IS - 2

ER -