Catalogs of Wide Binaries and their Impact on Galactic Astronomy (2006)
Wide binaries, particularly in large numbers and as free from selection biases as possible, constitute a largely overlooked tool for studying the Galaxy. The goal of this review is to highlight the...
The old globular cluster system of the dIrr galaxy NGC1427A in the Fornax cluster (2006)
Georgiev, Iskren Y., Hilker, Michael, Puzia, Thomas H., Chaname, Julio, Mieske, Steffen, Goudfrooij, Paul, ...
We present a study of the old globular cluster (GC) population of the dwarf irregular galaxy NGC 1427A using multi-wavelength VLT observations in U, B, V, I, H_alpha, J, H, and Ks bands under...
Topics of galactic structure and stellar and chemical evolution (2005)
In this thesis I explore current problems of Galactic astronomy by following two distinct but complementary approaches: the kinematic and photometric properties of local stellar populations, and the...
Halo Luminosity Function From Photometric Calibration of the Revised NLTT (2004)
Gould, Andrew, Kollmeier, Juna A., Chaname, Julio, Salim, Samir
We calibrate the photographic photometry of the revised New Luyten Two-Tenths catalog (rNLTT) by matching 3448 rNLTT stars to the Sloan Digital Sky Survey (SDSS). The correction is linear in...
Chaname, Julio, Pinsonneault, Marc, Terndrup, Donald
(ABRIDGED) We use a fully self-consistent evolutionary code to follow the rotational evolution of red giants, making a comprehensive attempt to assess the role of rotationally induced mixing in the...
New Hipparcos-based Parallaxes for 424 Dim Stars (2003)
We present a catalog of 424 common proper motion companions to Hipparcos stars with good (>3 sigma) parallaxes, thereby effectively providing new parallaxes for these companions. Compared to stars in...
The End of the MACHO Era: Limits on Halo Dark Matter from Stellar Halo Wide Binaries (2003)
Yoo, Jaiyul, Chaname, Julio, Gould, Andrew
We simulate the evolution of halo wide binaries in the presence of MAssive Compact Halo Objects (MACHOs) and compare our results to the sample of wide binaries of Chaname & Gould (2003). The observed...
We present a catalog of 1147 candidate common proper motion binaries selected from the revised New Luyten Two-Tenths Catalog. Among these, we identify 999 genuine physical pairs using the measured...
Millisecond Pulsars as Probes of Mass Segregation in the Galactic Center (2001)
We propose a simple test for the existence of a cluster of black hole remnants around Sgr A* that is based on a small sample of any type of Galactic Center objects, provided they are substantially...
Microlensing by Stellar Black Holes Around Sgr A* (2001)
Chaname, Julio, Gould, Andrew, Miralda-Escude, Jordi
We show that at any given time, the Galactocentric black hole Sgr A* is expected to be microlensing N(lens)=1.7 bulge stars if the threshold of detectability of the fainter image is K(thr)=21, and...
Topics of galactic structure and stellar and chemical evolution
In this thesis I explore current problems of Galactic astronomy by following two distinct but complementary approaches: the kinematic and photometric properties of local stellar populations, and the...