2. Research Programs 2.1 Stellar Astronomy
نویسنده
چکیده
1. PERSONNEL Staff Members: L. Searle ~Director!, H. Babcock ~Emeritus!, A. Dressler, W. Freedman, J. Kristian, P. McCarthy, E. Persson, G. Preston, A. Sandage, S. Shectman, I. Thompson, R. Weymann Staff Associates: S. Majewski Las Campanas Research Staff: M. Roth ~Director, Las Campanas Observatory!, W. Krzeminski, W. Kunkel Postdoctoral Fellows: J. Dalcanton, A. McWilliam, J. Mulchaey, I. Smail, J. Willick, D. Zaritsky, A. Zabludoff Postdoctoral Associates: R. Hill, S. Landy, R. Phelps, M. Rauch Support Scientists: W. Kells, D. Murphy, A. Sivaramakrishnan Supporting Staff: Pasadena ~27 persons!, Las Campanas ~37 persons!
منابع مشابه
Stellar Populations in the Central Galaxies of Fossil Groups
It is inferred from the symmetrical and luminous X-ray emission of fossil groups that they are mature, relaxed galaxy systems. Cosmological simulations and observations focusing on their dark halo and inter-galactic medium properties confirm their early formation. Recent photometric observations suggest that, unlike the majority of non-fossil brightest group galaxies (BGGs), the central early-t...
متن کاملS ep 2 01 4 Most Sub - Arcsecond Companions of Kepler Exoplanet Candidate Host Stars are Gravitationally Bound
Using the known detection limits for high-resolution imaging observations and the statistical properties of true binary and line-of-sight companions, we estimate the binary fraction of Kepler exoplanet host stars. Our speckle imaging programs at the WIYN 3.5m and Gemini North 8.1-m telescopes have observed over 600 Kepler objects of interest (KOIs) and detected 49 stellar companions within ∼1 a...
متن کاملEvaluation of New MOND Interpolating Function with Rotation Curves of Galaxies
The rotation curves of a sample of 46 low- and high-surface brightness galaxies are considered in the context of Milgrom's modi_ed dynamics (MOND) to test a new interpolating function proposed by Zhao et al. (2010) [1] and compare with the results of simple interpolating function. The predicted rotation curves are calculated from the total baryonic matter based on the B-band surface photometry,...
متن کاملPulsating red giant and supergiant stars in the Local Group dwarf galaxy Andromeda I
We have conducted an optical long-term monitoring survey of the majority of dwarf galaxies in the Local Group, with the Isaac Newton Telescope (INT), to identify the long period variable (LPV) stars. LPV stars vary on timescales of months to years, and reach the largest amplitudes of their brightness variations at optical wavelengths, due to the changing temperature. They trace stellar populati...
متن کاملThe Physical Properties and Effective Temperature Scale of O-type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds
We have obtained HST and ground-based observations of a sample of 20 O-type stars in the LMC and SMC, including six of the hottest massive stars known (subtypes O2-3) in the R136 cluster. In general, these data include (a) the HST UV spectra in order to measure the terminal velocities of the stellar winds, (b) high signal-to-noise, blue-optical data where the primary temperatureand gravity-sens...
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