SIMBAD references

2001A&A...367...46K - Astronomy and Astrophysics, volume 367, 46-50 (2001/2-3)

ATCA search for 21 cm emission from a candidate damped Ly-α absorber at (z)=0.101.

KANEKAR N., CHENGALUR J.N., SUBRAHMANYAN R. and PETITJEAN P.

Abstract (from CDS):

We report a deep search for 21 cm emission/absorption from the z∼0.101 candidate damped Lyman-α system towards PKS 0439-433, using the Australia Telescope Compact Array (ATCA). The spectrum shows a weak absorption feature - at the 3.3 σ level - which yields a lower limit of 730K on the spin temperature of the system. No H I emission was detected: the 3σ upper limit on the H I mass of the absorber is 2.25x109M, for a velocity spread of ∼70km/s. The low H I mass and the high spin temperature seem to rule out the possibility that the absorber is a large gas-rich spiral galaxy.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: individual: PKS 0439-433 - radio lines: general

Simbad objects: 3

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