Browsing by Author "Irwin, Mike J."

Now showing items 1-4 of 4

  • A Bayesian Approach to Locating the Red Giant Branch Tip Magnitude (Part II); Distances to the Satellites of M31 

    Conn, Anthony R.; Ibata, Rodrigo A.; Lewis, Geraint F.; Parker, Quentin A.; Zucker, Daniel B.; Martin, Nicolas F.; McConnachie, Alan W.; Irwin, Mike J.; Tanvir, Nial; Fardal, Mark A.; Ferguson, Annette M. N.; Chapman, Scott C.; Valls-Gabaud, David (2012-09-21)
    In `A Bayesian Approach to Locating the Red Giant Branch Tip Magnitude (PART I),' a new technique was introduced for obtaining distances using the TRGB standard candle. Here we describe a useful complement to the technique ...

  • The M33 Globular Cluster System with PAndAS Data: The Last Outer Halo Cluster? 

    Cockcroft, Robert; Harris, William E.; Ferguson, Annette M. N.; Huxor, Avon; Ibata, Rodrigo; Irwin, Mike J.; McConnachie, Alan W.; Woodley, Kristin A.; Chapman, Scott C.; Lewis, Geraint F.; Puzia, Thomas H. (2011-01-12)
    We use CFHT/MegaCam data to search for outer halo star clusters in M33 as part of the Pan-Andromeda Archaeological Survey (PAndAS). This work extends previous studies out to a projected radius of 50 kpc and covers over 40 ...

  • The stellar halo and outer disk of M33 

    McConnachie, Alan W.; Chapman, Scott C.; Ibata, Rodrigo A.; Ferguson, Annette M. N.; Irwin, Mike J.; Lewis, Geraint F.; Tanvir, Nial R. (2006-08-10)
    We present first results from a Keck/DEIMOS spectroscopic survey of red giant branch (RGB) stars in M33. The radial velocity distributions of the stars in our fields are well described by three Gaussian components, ...

  • Unearthing Foundations of a Cosmic Cathedral: Searching the Stars for M33's Halo 

    Cockcroft, Robert; McConnachie, Alan W.; Harris, William E.; Ibata, Rodrigo; Irwin, Mike J.; Ferguson, Annette M. N.; Fardal, Mark A.; Babul, Arif; Chapman, Scott C.; Lewis, Geraint F.; Martin, Nicolas F.; Puzia, Thomas H. (2012-10-29)
    We use data from the Pan-Andromeda Archaeological Survey (PAndAS) to search for evidence of an extended halo component belonging to M33 (the Triangulum Galaxy). We identify a population of red giant branch (RGB) stars at ...