Publication Date:
2020-10-29
Description:
We present the results from the search for Lyman Alpha emitters (LAEs) in the proximity of 11 C iv absorption systems at z 〉 4.7 in the spectrum of the QSO J1030+0524, using data from MUSE. We have found multiple LAE candidates close to four C iv systems at $z_{
m {{C,{small IV}}}}=4.94$–5.74 with $log _{10}(N_{
m{{C,{small IV}}}}[$cm−2]) 〉 13.5. At z = 5–6, C iv systems with W$_0(
m {{C,{small IV}}})〉 0.2$ Å seem more likely to have galaxies with Lyα emission within ρ 〈 200 proper kpc (4/5 cases), than the C iv systems with W$_0(
m {{C,{small IV}}}) 0.5 Å is in the range $11, {lesssim},
ho , {lesssim}, 200$ proper kpc (pkpc). Furthermore, all candidates are in the luminosity range 0.18–1.15 L$^{star }_{
m{{Lyalpha}}}(z=5.7)$, indicating that the environment of C iv systems within 200 pkpc is populated by the faint end of the Lyα luminosity function. We report a 0.28 L$^{star }_{
m {{Lyalpha}}}$ galaxy at a separation of ρ = 11 pkpc from a strong C iv absorption ($log _{10}(N_{
m {{C,{small IV}}}}[$cm−2]) = 14.52) at $z_{
m {{C,{small IV}}}}=5.72419$. The prevalence of sub-L$^{star }_{
m {{Lyalpha}}}$ galaxies in the proximity of z 〉 4.9 C iv systems suggest that the absorbing material is rather young, likely ejected in the recent past of the identified galaxies. The connection between faint LAEs and high-ionization absorption systems reported in this work, is potentially a consequence of the role of low mass galaxies in the early evolution of the circum-galactic and intergalactic media.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
