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120 papers · 1 filter
WISE Circumstellar Disks in the Young Sco-Cen Association
Aaron C. Rizzuto, Michael J. Ireland, Daniel B. Zucker
We present an analysis of the WISE photometric data for 829 stars in the Sco-Cen OB2 association, using the latest high-mass membership probabilities. We detect infrared excesses a…
Extending the RP survey to the outer LMC
Warren A. Reid, Quentin A. Parker
We are extending our search for faint PNe in the LMC to include the outer 56 deg2 area not covered in the original UKST survey of the central 25 deg2 region. Candidate PNe have bee…
The Gemini Cluster Astrophysics Spectroscopic Survey (GCLASS): The Role of Environment and Self-Regulation in Galaxy Evolution at z ~ 1
Adam Muzzin, Gillian Wilson, H. K. C. Yee +15
We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 < z < 1.20 using a 3.6um-selected spectroscopic sample of 797 cluster and field galaxies drawn…
The Sydney-AAO Multi-object Integral field spectrograph (SAMI)
Scott M. Croom, Jon S. Lawrence, Joss Bland-Hawthorn +22
We demonstrate a novel technology that combines the power of the multi-object spectrograph with the spatial multiplex advantage of an integral field spectrograph (IFS). The Sydney-…
Principal Component Analysis on Chemical Abundances Spaces
Yuan-Sen Ting, Kenneth C. Freeman, Chiaki Kobayashi +2
In preparation for the HERMES chemical tagging survey of about a million Galactic FGK stars, we estimate the number of independent dimensions of the space defined by the stellar ch…
Photoionization modeling of the Galactic planetary nebulae Abell 39 and NGC 7027
Ashkbiz Danehkar, David J. Frew, Quentin A. Parker +1
We estimate distances to the spherical planetary nebula Abell 39 and the bipolar planetary nebula NGC 7027 by interpolating from a wide grid of photoionization models using the 3-D…