Observed Gas Infall into Galaxies

Sancisi, R.; Broeils, Ah; Kamphuis, J.; Hulst, Thijs van der

doi:10.1007/978-3-642-75273-5_74

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2003

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Cited by 9 publications

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“…Many observational facts strongly suggest a high gas infall rate (e.g. Toomre 1990;Sancisi et al 1990;Jiang & Binney 1999). Dynamics of galaxy disks, bar and spiral reformation constrain this rate such that galaxies may double their mass in less than 10 Gyrs Block et al 2002).…”

Section: Introductionmentioning

confidence: 99%

On the global structure of distant galactic disks

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Dettmar

Combes³

2003

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Abstract. Radial and vertical profiles are determined for a sample of 34 edge-on disk galaxies in the HDFs, selected for their apparent diameter larger than 1.3 and their unperturbed morphology. The thickness and flatness of their galactic disks are determined and discussed with regard to evolution with redshift. We find that sub-L * spiral galaxies with z ∼ 1 have a relative thickness or flatness (characterized by h z /h the scaleheight to scalelength ratio) globally similar to those in the local Universe. A slight trend is however apparent, with the h z /h flatness ratio larger by a factor of ∼1.5 in distant galaxies if compared to local samples. In absolute value, the disks are smaller than in present-day galaxies. About half of the z ∼ 1 spiral disks show a non-exponential surface brightness distribution.

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