Search Publications
A Bright Molecular Core in a Crab Nebula Filament
Ferland, G. J.; Loh, E. D.; Baldwin, J. A.
In a sub-arcsec near-infrared survey of the Crab Nebula using the new Spartan Infrared Camera, we have found several knots with high surface brightness in the H2 2.12 µm line and a very large H2 2.12 µm to Brγ ratio. The brightest of these knots has an intensity ratio I(H2 2.12 µm)/I(Brγ) = 18 ± 9…
UCAC3: Astrometric Reductions
Finch, Charlie T.; Zacharias, Norbert; Wycoff, Gary L.
Presented here are the details of the astrometric reductions from the x, y data to mean right ascension (R.A.), declination (decl.) coordinates of the third U.S. Naval Observatory CCD Astrograph Catalog (UCAC3). For these new reductions we used over 216,000 CCD exposures. The Two-Micron All-Sky Survey (2MASS) data are used extensively to probe for…
An X-ray Investigation of Three Supernova Remnants in the Large Magellanic Cloud
Smith, R. C.; Points, S. D.; Williams, R. +2 more
We have investigated three supernova remnants (SNRs) in the LMC using multi-wavelength data. These SNRs are generally fainter than the known sample (see Section 4) and may represent a previously missed population. One of our SNRs is the second LMC remnant analyzed which is larger than any Galactic remnant for which a definite size has been establi…
Spectroscopic Confirmation of a z = 2.79 Multiply Imaged Luminous Infrared Galaxy Behind the Bullet Cluster
Papovich, Casey; Bradač, Maruša; Jones, Christine +1 more
We report spectroscopic confirmation and high-resolution infrared imaging of a z = 2.79 triply imaged galaxy behind the Bullet Cluster. This source, a Spitzer-selected luminous infrared galaxy, is confirmed via polycyclic aromatic hydrocarbon (PAH) features using the Spitzer Infrared Spectrograph (IRS) and resolved with Hubble Space Telescope Wide…
Magnetic activity of the star Corot-Exo-2a
Savanov, I. S.
Continuous photometric observations of the young active solar-type star Corot-Exo-2a using the “Corot” space telescope obtained over 142 days were used to analyze the star’s surface temperature inhomogeneities and to monitor their continuous evolution. This analysis was based on the iPH code, which reconstructs the distribution of temperature inho…
Too Little, Too Late: How the Tidal Evolution of Hot Jupiters Affects Transit Surveys of Clusters
Debes, John H.; Jackson, Brian
The tidal evolution of hot Jupiters may change the efficiency of transit surveys of stellar clusters. The orbital decay that hot Jupiters suffer may result in their destruction, leaving fewer transiting planets in older clusters. We calculate the impact tidal evolution has for different assumed stellar populations, including that of 47 Tuc, a glob…
Thermal properties of asteroid 21 Lutetia from Spitzer Space Telescope observations
Jorda, L.; Lamy, P. L.; Barucci, M. A. +3 more
Context. Asteroid 21 Lutetia is the second target of the Rosetta space mission with a flyby scheduled in July 2010. To best prepare the observational campaign, Lutetia is being extensively characterized by ground- and space-based astronomical facilities.
Aims: We used the Spitzer Space Telescope (SST) to determine the thermal properties of Lu…
The Radio Jet Interaction in NGC 5929: Direct Detection of Shocked Gas
Wilson, A. S.; Rosario, D. J.; Nelson, C. H. +1 more
We report on the discovery of kinematic shock signatures associated with a localized radio jet interaction in the merging Seyfert galaxy NGC 5929. We explore the velocity-dependent ionization structure of the gas and find that low-ionization gas at the interaction site is significantly more disturbed than high-ionization gas, which we attribute to…
Rotational variation of the spectral slope of (21) Lutetia, the second asteroid target of ESA Rosetta mission
Barbieri, C.; Barucci, M. A.; Lazzarin, M. +5 more
The ESA Rosetta mission, launched in 2004 March, will flyby the second asteroid target (21) Lutetia in 2010 July. This asteroid is quite different from (2867) Steins, encountered by Rosetta in 2008 September. Lutetia is in fact a much larger asteroid, approximately 100km of diameter, as compared to the 5 km of Steins and also its surface compositi…
The XMM-Newton X-ray Spectra of the Most X-ray Luminous Radio-quiet ROSAT Bright Survey-QSOs: A Reference Sample for the Interpretation of High-redshift QSO Spectra
Corral, A.; Krumpe, M.; Lamer, G. +1 more
We present the broadband X-ray properties of four of the most X-ray luminous (L X >= 1045 erg s-1 in the 0.5-2 keV band) radio-quiet QSOs found in the ROSAT Bright Survey. This uniform sample class, which explores the extreme end of the QSO luminosity function, exhibits surprisingly homogenous X-ray spectral pro…