SIMBAD references

2007AJ....133.1085B - Astron. J., 133, 1085-1091 (2007/March-0)

A normal stellar disk in the galaxy Malin 1.


Abstract (from CDS):

Since its discovery, Malin 1 has been considered the prototype and most extreme example of the class of giant low surface brightness disk galaxies. Examination of an archival Hubble Space Telescope I-band image reveals that Malin 1 contains a normal stellar disk that was not previously recognized, having a central I-band surface brightness of µ0=20.1 mag/arcsec2 and a scale length of 4.8 kpc. Out to a radius of ∼10 kpc, the structure of Malin 1 is that of a typical SB0/a galaxy. The remarkably extended, faint outer structure detected out to r~100 kpc appears to be a photometrically distinct component and not a simple extension of the inner disk. In terms of its disk scale length and central surface brightness, Malin 1 was originally found to be a very remote outlier relative to all other known disk galaxies. The presence of a disk of normal size and surface brightness in Malin 1 suggests that such extreme outliers in disk properties probably do not exist, but underscores the importance of the extended outer disk regions for a full understanding of the structure and formation of spiral galaxies.

Abstract Copyright:

Journal keyword(s): Galaxies: Individual: Name: Malin 1 - Galaxies: Spiral - Galaxies: Structure

Simbad objects: 6

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