Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ingn....8....8m&link_type=abstract
The Newsletter of the Isaac Newton Group of Telescopes (ING Newsl.), issue no. 8, p. 8.
Astronomy and Astrophysics
Astronomy
Andromeda Galaxy, M31 Galaxy, Wide-Field Astronomy
Scientific paper
The structure of the outer regions of galaxies is a key area in which to look for fossil remnants of the accreted masses from which the galaxies that we see today are thought to be built. The importance of these regions has increased in recent years as cosmological theories of structure formation become more exact in their predictions, and the observational instrumentation required to conduct these detailed analyses becomes more sophisticated. Currently composed of 165 individual pointings of the Isaac Newton Telescope Wide Field Camera (INT WFC), the M31 halo survey consists of photometry for over 7 million sources, on a photometric system accurate to 2% over ~40 square degrees on the sky, in some places probing the halo of Andromeda out to 6° (~80kpc). Observations of 800-1000 seconds in the Johnson V (V') and Gunn i (i') passbands are deep enough to detect individual RGB stars down to V'= 0 and Main Sequence stars down to V'=-1. This unique dataset has provided, for the first time, a panoramic deep view of the stellar halo of a giant galaxy thought to be similar to our own Milky Way.
Ferguson Andrew
Huxor Avon
Ibata Rodrigo
Irwin Mike
Lewis Geraint
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