# Browsing Astronomy by Issue Date

Sort by: Order: Results:

• (Indiana University, 2011-02-18)
The study of gravitational instabilities (GIs) and their effects in protoplanetary disks has been an area of active research for over a decade. Although some studies have indicated that GIs cannot form gas giant planets ...
• (2011-05-25)
Characterization of migration in gravitationally unstable disks is necessary to understand the fate of protoplanets formed by disk instability. As part of a larger study, we are using a 3D radiative hydrodynamics code to ...
• (The American Astronomical Society, 2012)
We present near-infrared light curves of supernova (SN) 2011fe in M101, including 34 epochs in H band starting 14 days before maximum brightness in the B band. The light curve data were obtained with the WIYN High-Resolution ...
• (The American Astronomical Society, 2012)
This paper presents results from wide-field imaging of the globular cluster (GC) systems of five intermediate-luminosity ($M_{V}$ ~ –21 to –22) early-type galaxies. The aim is to accurately quantify the global properties ...
• (Oxford University Press on behalf of the Royal Astronomical Society, 2012)
Variable Na I absorption lines have been reported in a number of Type Ia supernovae (SNeIa). The presence of this circumstellar material suggests that cataclysmic variables (CVs) with a giant donor star may be the progenitors ...
• (The American Astronomical Society, 2012)
During a wide-field narrowband $\text{H}\alpha$ imaging survey, we noted the presence of numerous isolated emission-line point sources in the data. These objects could represent ultra-low-luminosity galaxies at low-redshift ...
• (American Physical Society, 2012)
A leading approach to the modeling of extreme mass ratio inspirals involves the treatment of the smaller mass as a point particle and the computation of a regularized self-force acting on that particle. In turn, this ...
• (The American Astronomical Society, 2012)
In this paper, we posit that galaxy luminosity functions (LFs) come in two fundamentally different types depending on whether the luminosity traces galaxy stellar mass or its current star formation rate (SFR). $\textit{Mass ... • (The American Astronomical Society, 2012) We consider the effects of non-constant star formation histories (SFHs) on$\text{H}\alpha$and GALEX far-ultraviolet (FUV) star formation rate (SFR) indicators. Under the assumption of a fully populated Chabrier initial ... • (The American Astronomical Society, 2012) We present the Arizona CDFS Environment Survey (ACES), a recently completed spectroscopic redshift survey of the Chandra Deep Field-South (CDFS) conducted using the Inamori-Magellan Areal Camera and Spectrograph on the ... • (The American Astronomical Society, 2012) UV observations in the local universe have uncovered a population of early-type galaxies with UV flux consistent with low-level recent or ongoing star formation. Understanding the origin of such star formation remains an ... • (The American Astronomical Society, 2012) The shutdown of star formation in galaxies is generally termed "quenching." Quenching may occur through a variety of processes, e.g., active galactic nucleus (AGN) feedback, stellar feedback, or the shock heating of gas ... • (The American Astronomical Society, 2012) We present results from a study of the globular cluster (GC) systems of four spiral and S0 galaxies imaged as part of an ongoing wide-field survey of the GC systems of giant galaxies. The target galaxies - the SB0 galaxy ... • (The American Astronomical Society, 2012) The Galaxy appears to be richer in young, massive stellar clusters than previously known, due to advances in infrared surveys that have uncovered deeply embedded regions of star formation. Young, massive clusters can ... • (The American Astronomical Society, 2012) We conduct a convergence study of a protostellar disk, subject to a constant global cooling time and susceptible to gravitational instabilities (GIs), at a time when heating and cooling are roughly balanced. Our goal is ... • (The American Astronomical Society, 2012) We present radial velocities and chemical abundances for nine stars in the old, distant open clusters Be18, Be21, Be22, Be32, and PWM4. For Be18 and PWM4, these are the first chemical abundance measurements. Combining our ... • (The American Astronomical Society, 2012) This paper presents an analysis of the correlation between the number of globular clusters ($N_{GC}$) in giant galaxies and the mass of the galaxies' central supermassive black hole ($M_{SMBH}$). I construct a sample of ... • (The American Astronomical Society, 2012) We present a star formation rate (SFR) calibration based on optical data that is consistent with average observed rates in both the red and blue galaxy populations at$z \sim 1$. The motivation for this study is to calculate ... • (The American Astronomical Society, 2012) We present the average metallicity and star formation rate (SFR) of$Ly\alpha$emitters (LAEs) measured from our large-area survey with three narrowband (NB) filters covering the$Ly\alpha, \big[O II\big]\lambda3727$, and ... • (The American Astronomical Society, 2012) We have used deep$\textit{GALEX}\$ observations at the infall region of the Coma cluster to measure the faintest ultraviolet (UV) luminosity functions (LFs) presented for a rich galaxy cluster thus far. The Coma UV LFs are ...

Advanced Search