Deep Ks -near-infrared Surface Photometry of 80 Dwarf Irregular Galaxies in the Local Volume

Fingerhut, Robin L.; McCall, Marshall L.; Argote, Mauricio; Cluver, Michelle E.; Nishiyama, Shogo; Rekola, Rami T. F.; Richer, Michael G.; Vaduvescu, Ovidiu; Woudt, Patrick A.
Referencia bibliográfica

The Astrophysical Journal, Volume 716, Issue 1, pp. 792-809 (2010).

Fecha de publicación:
6
2010
Número de autores
9
Número de autores del IAC
0
Número de citas
18
Número de citas referidas
17
Descripción
We present deep near-infrared (Ks ) images and surface photometry for 80 dwarf irregular galaxies (dIs) within ~5 Mpc of the Milky Way. The galaxy images were obtained at five different facilities between 2004 and 2006. The image reductions and surface photometry have been performed using methods specifically designed for isolating faint galaxies from the high and varying near-infrared sky level. Fifty-four of the 80 dIs have surface brightness profiles which could be fit to a hyperbolic-secant (sech) function, while the remaining profiles could be fit to the sum of a sech and a Gaussian function. From these fits, we have measured central surface brightnesses, scale lengths, and integrated magnitudes. This survey is part of a larger study of the connection between large-scale structure and the global properties of dIs, the hypothesized building-blocks of more massive galaxies.
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