A search for CI J=2--1 emission in IRAS F10214+4724

Abstract

Sensitive new observations of the fine structure line ${}^3$P${}_2$$\to$ ${}^3$P${}_1$ (J=2--1) of the neutral atomic carbon CI (${\nu }_{rest}\sim 809$ GHz) in the strongly lensed Ultra Luminous Infrared Galaxy (ULIRG) IRAS F10214+4724 at z=2.3 with the mm/sub-mm telescope James Clerk Maxwel (JCMT) are presented. These do not confirm the presence of emission from this line at the flux levels or angular extent previously reported in the literature. The new 2$\sigma$ upper limits are: $\rm S_{CI}\la 7 Jy km s^{-1}$ (central position), and $\rm < S_{CI} > \la 8.5 Jy km s^{-1}$ (average over the two $[\delta (\mathrm{RA}),\delta (\mathrm{Dec})]=[0^{\prime \prime },\pm 10^{\prime \prime }]$ positions). A CI emission assumed fully concomitant with the bulk of H${}_2$ and confined entirely within the strongly lensed object yields an upper limit of $\rm M_{CI}(H_2)\la 1.5 \times 10^{10} M_{\odot}$, compatible with the reported CO-derived H${}_2$ gas mass, within the uncertainties of the two methods. A comparison with the recent detection of the ${}^3$P${}_1$$\to$ ${}^3$P${}_0$ (J=1--0) line in this galaxy by Weiss et al. (2004) is made and the large discrepancy with the previous CI measurements is briefly discussed.

8 pages, 3 figuers, accepted for publication in the Astrophysical Journal

References in corpus (6)

• Molecular Gas in the Host Galaxy of a Quasar at Redshift z=6.42
• The CI lines as tracers of molecular gas, and their prospects at high redshifts
• Interferometric Observations of Powerful CO Emission from the three Submillimeter Galaxies at z=2.30, 2.51 and 3.35
• Gas and Dust in the Cloverleaf Quasar at Redshift 2.5
• Atomic carbon at redshift ~2.5
• Molecular Gas in the Lensed Lyman Break Galaxy cB58

Cited by in corpus (4)

• A Survey of Atomic Carbon at High Redshift
• Atomic Carbon in APM 08279+5255 at z=3.91
• The CO line SED and atomic carbon in IRAS F10214+4724
• Extreme conditions in the molecular gas of lensed star-forming galaxies at z~3