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 granularity.tex ApJL accepted, Feb 2006
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\shorttitle{Granular Extinction in the Galactic Centre}
\shortauthors{Gosling, Blundell \& Bandyopadhyay}

\begin{document}

\title{Complex small-scale structure in the infrared extinction
towards the Galactic Centre}

\author{Andrew J.\ Gosling\altaffilmark{1}, Katherine M.\

  Road, Oxford, OX1 3RH, U.K.}

\begin{abstract}

A high level of complex structure, or ``granularity'', has been
observed in the distribution of infrared-obscuring material towards
the Galactic Centre (GC), with a characteristic scale of $5\arcsec -
15\arcsec$, corresponding to $0.2 - 0.6\,{\rm pc}$ at a GC distance of
$8.5\,{\rm kpc}$. This structure has been observed in ISAAC images
which have a resolution of $\sim0.6\arcsec$, significantly higher than
that of previous studies of the GC.

We have discovered granularity throughout the GC survey region, which
covers an area of $1.6^{\circ} \times 0.8^{\circ}$ in longitude and
latitude respectively ($300\,{\rm pc} \times 120\,{\rm pc}$ at
$8.5\,{\rm kpc}$) centred on Sgr A*.  This granularity is variable
over the whole region, with some areas exhibiting highly structured
extinction in one or more wavebands and other areas displaying no
structure and a uniform stellar distribution in all wavebands.  The
granularity does not appear to correspond to longitude, latitude or
radial distance from Sgr A*. We find that regions exhibiting high
granularity are strongly associated with high stellar reddening.
\end{abstract}

\keywords{dust, extinction---Galaxy: center---infrared: stars---ISM: structure}
\end{document}





On 21/02/06, Jennifer & Joseph <jlazio@patriot.net> wrote:
> Hello,
>
> I saw this paper on astro-ph.  If you haven't already done so, please
> don't forget to submit it to GCNews, <URL:
> http://www.aoc.nrao.edu/~gcnews/ >, the newsletter for Galactic center
> research.
>
> Thanks,
>
> -- Joseph
>
>
>


--
---------------------------------------------------------------------
Andrew Gosling        ajgosling@gmail.com
MCR Social Sec        ajg@astro.ox.ac.uk
Hertford College      andrew.gosling@hertford.ox.ac.uk
Oxford