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6 papers · 2 filters
The Large Magellanic Cloud and the Distance Scale
Alistair R Walker
The Magellanic Clouds, especially the Large Magellanic Cloud, are places where multiple distance indicators can be compared with each other in a straight-forward manner at consider…
Light echoes reveal an unexpectedly cool Eta Carinae during its 19th-century Great Eruption
A. Rest, J. L. Prieto, N. R. Walborn +14
Eta Carinae (Eta Car) is one of the most massive binary stars in the Milky Way. It became the second-brightest star in the sky during its mid-19th century "Great Eruption," but the…
The current star formation rate of K+A galaxies
Danielle Nielsen, Roberto De Propris, Susan E. Ridgway +1
We derive the stacked 1.4 GHz flux from FIRST (Faint Images of the Radio Sky at Twenty Centimeters) survey for 811 K+A galaxies selected from the SDSS DR7. For these objects we fin…
Separating the conjoined red clump in the Galactic Bulge: Kinematics and Abundances
Roberto De Propris, R. Michael Rich, Andrea Kunder +8
We have used the AAOMEGA spectrograph to obtain R spectra of 714 stars that are members of two red clumps in the Plaut Window Galactic bulge field $(l,b)=0^{\circ},-8^{…
Using H-alpha Morphology and Surface Brightness Fluctuations to Age-Date Star Clusters in M83
Bradley C. Whitmore, Rupali Chandar, Hwihyun Kim +21
We use new WFC3 observations of the nearby grand design spiral galaxy M83 to develop two independent methods for estimating the ages of young star clusters. The first method uses t…
The Carina Project. IV. radial velocity distribution
M. Fabrizio, M. Nonino, G. Bono +16
We present new and accurate radial velocity (RV) measurements of luminous stars of all ages (old horizontal branch, intermediate--age red clump, and young blue plume, as well as re…