2009A&A...500L...1M


Query : 2009A&A...500L...1M

2009A&A...500L...1M - Astronomy and Astrophysics, volume 500, L1-4 (2009/6-3)

Strong [CII] emission at high redshift.

MAIOLINO R., CASELLI P., NAGAO T., WALMSLEY M., DE BREUCK C. and MENEGHETTI M.

Abstract (from CDS):

We report the detection of the [CII]157.74µm fine-structure line in the lensed galaxy BRI 0952-0115 at z=4.43, using the APEX telescope. This is the first detection of the [Cii] line in a source with LFIR<1013L at high redshift. The line is much stronger than previous [CII] detections at high-z (a factor of 5-8 higher in flux), partly due to the lensing amplification. The L[CII]/LFIR ratio is 10–2.9, which is higher than observed in local galaxies with similar infrared luminosities. Together with previous observations of [CII] at high redshift, our result suggests that the [CII] emission in high-redshift galaxies is enhanced relative to local galaxies with the same infrared luminosity. This finding may result from selection effects of the few current observations of [CII] at high redshift and, in particular, from non detections that may not have been published (although the few published upper limits are still consistent with the [CII] enhancement scenario). If the trend is confirmed with larger samples, it would indicate that high-z galaxies are characterized by different physical conditions than for their local counterparts. Regardless of the physical origin of the trend, this effect would increase the potential of the [CII]158µm line to search and characterize high-z sources.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - submillimeter - infrared: galaxies

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15990 1
2 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2239 0
3 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 132 0
4 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5583 6
5 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 422 0
6 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 360 5
7 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 353 0
8 QSO J2322+1944 QSO 23 22 07.164 +19 44 22.98     18.29     ~ 71 0

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2022.05.21-15:49:42

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