Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-01-23
Mon.Not.Roy.Astron.Soc.376:939-959,2007
Astronomy and Astrophysics
Astrophysics
22 pages, lots of figures (reduced in quality for astro-ph submission). Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2007.11503.x
We present the results of an AAT wide-field camera survey of the stars in the Monoceros Ring and purported Canis Major overdensity in the Galactic longitudes of {\it l} = (193 - 276)$^\circ$. Current numerical simulations suggest that both of these structures are the result of a single on-going accretion event, although an alternative solution is that the warped and flared disc of the Galaxy can explain the origin of both of these structures. Our results show that, with regards the Monoceros Ring, the warped and flared disc is unable to reproduce the locations and strengths of the detections observed around the Galaxy. This supports a non-Galactic origin for this structure. We report 8 new detections and 2 tentative detections of the Monoceros Ring in this survey. The exact nature of the Canis Major overdensity is still unresolved although this survey provides evidence that invoking the Galactic warp is not a sufficient solution when compared with observation. Several fields in this survey are highly inconsistent with the current Galactic disc models that include a warp and flare, to such an extent that explaining their origins with these structures is problematic. (Abridged)
Bellazzini Michele
Conn Blair C.
Ferguson Annette M. N.
Gil-Merino Rodrigo
Ibata Rodrigo A.
No associations
LandOfFree
The AAT/WFI survey of the Monoceros Ring and Canis Major Dwarf galaxy: I. from l = (193 - 276)o does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The AAT/WFI survey of the Monoceros Ring and Canis Major Dwarf galaxy: I. from l = (193 - 276)o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The AAT/WFI survey of the Monoceros Ring and Canis Major Dwarf galaxy: I. from l = (193 - 276)o will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-602721