Resolving the delta Andromedae spectroscopic binary with direct imaging

We present a direct image of the innermost companion to the red giant delta Andromedae using the Stellar Double Coronagraph at the Palomar Observatory. We use a Markov chain Monte Carlo based algorithm to simultaneously reduce the data and perform astrometry and photometry of the companion. We determine that the companion is most likely a main-sequence K-type star and is certainly not the previously hypothesized white dwarf.Comment: ApJ, accepted. 10 pages, 3 figure

Market Response to the Airline, Natural Gas and Trucking Deregulation Acts: An Empirical Analysis

P.R. Chandy is an Associate Professor of Finance at North Texas State University. Wallace N. Davidson is an Associate Professor of Finance at North Texas State University. Michael C. Walker is an Associate Professor and Chairman of the Department of Finance at the University of Cincinnati

Impacts Of Exchange Rate Fluctuations And Government Debt On Economic Performance For A Latin American Country

Applying the autoregressive conditional heteroskedascity (ARCH) model as developed by Professor Robert F. Engle (1982, 2001) and based on a 1970-2002 sample, real GDP was found positively affected by the peso depreciation, the U.S. economy, real M2 money, government spending and the expected inflation rate, and negatively influenced by government debt.  The gradual recovery of the U.S. economy is expected to help the Colombian economy.  An increase in government spending helps raise real output, but increasing government debt to finance rising budget deficits would reduce national output

Perusing The Headwaters Of Diversity Among University Presidents

Females and minorities are gaining clout in higher education as the numbers of graduates in each of these groups indicate.  Diversity among university presidents is a reality.  Indications are that the number of women receiving advanced degrees will continue to grow for some time.  Low estimates of graduation rates among women and minorities from years ago do not hold.  The impacts of this reality in higher education will continue to be felt for some time

Large-Scale Correlations in the Lyman-alpha Forest at z = 3-4

We present a study of the spatial coherence of the intergalactic medium toward two pairs of high-redshift quasars with moderate angular separations observed with Keck/ESI, Q1422+2309A/Q1424+2255 (z_em = 3.63, theta = 39") and Q1439-0034A/B (z_em = 4.25, theta = 33"). The crosscorrelation of transmitted flux in the Lyman-alpha forest shows a 5-7 sigma peak at zero velocity lag for both pairs. This strongly suggests that at least some of the absorbing structures span the 230-300/h_70 proper kpc transverse separation between sightlines. We also statistically examine the similarity between paired spectra as a function of transmitted flux, a measure which may be useful for comparison with numerical simulations. In investigating the dependence of the correlation functions on spectral characteristics, we find that photon noise has little impact for S/N >~ 10 per resolution element. However, the agreement between the autocorrelation along the line sight and the crosscorrelation between sightlines, a potential test of cosmological geometry, depends significantly on instrumental resolution. Finally, we present an inventory of metal lines. These include a a pair of strong C IV systems at z ~ 3.4 appearing only toward Q1439B, and a Mg II + Fe II system present toward Q1439 A and B at z = 1.68.Comment: 33 pages, 13 figures, submitted to Ap

The price of white pine stumpage and lumber during the movement of New Hampshire sawmills into and out of production, Station Bulletin, no.480

The Bulletin is a publication of the New Hampshire Agricultural Experiment Station, College of Life Sciences and Agriculture, University of New Hampshire, Durham, New Hampshire

KECK HIRES Spectroscopy of APM 08279+5255

With an optical R-band magnitude of 15.2, the recently discovered z=3.911 BAL quasar APM 08279+5255 is an exceptionally bright high redshift source. Its brightness has allowed us to acquire a high signal-to-noise ratio (~100), high resolution (~6 km/s) spectrum using the HIRES echelle spectrograph on the 10-m Keck I telescope. Given the quality of the data, these observations provide an unprecedented view of associated and intervening absorption systems. Here we announce the availability of this spectrum to the general astronomical community and present a brief analysis of some of its main features.Comment: 21 pages including 5 figures. Accepted for publication by PAS

Baryon operators and spectroscopy in lattice QCD

The construction of the operators and correlators required to determine the excited baryon spectrum is presented, with the aim of exploring the spatial and spin structure of the states while minimizing the number of propagator inversions. The method used to construct operators that transform irreducibly under the symmetries of the lattice is detailed, and the properties of example operators are studied using domain-wall fermion valence propagators computed on MILC asqtad dynamical lattices.Comment: 7 pages, 2 figures, to appear in Proceedings of Workshop on Lattice Hadron Physics 2003, Cairns, Australia, July 22 - July 30, 200