Search Publications
About the Possible Role of Hydrocarbon Lakes in the Origin of Titan's Noble Gas Atmospheric Depletion
Lunine, J. I.; Cordier, D.; Mousis, O. +4 more
An unexpected feature of Titan's atmosphere is the strong depletion in primordial noble gases revealed by the Gas Chromatograph Mass Spectrometer aboard the Huygens probe during its descent on 2005 January 14. Although several plausible explanations have already been formulated, no definitive response to this issue has yet been found. Here, we inv…
Hard X-Ray Emission in the Star-Forming Region ON 2: Discovery with XMM-Newton
Gruendl, R. A.; Hamann, W. -R.; Chu, Y. -H. +3 more
We obtained X-ray XMM-Newton observations of the open cluster Berkeley 87 and the massive star-forming region (SFR) ON 2. In addition, archival infrared Spitzer Space Telescope observations were used to study the morphology of ON 2, to uncover young stellar objects, and to investigate their relationship with the X-ray sources. It is likely that th…
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…
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…
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…
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…
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…
The Electron Temperature of the Solar Transition Region as Derived from EIS and SUMER
Landi, E.; Doschek, G. A.; Muglach, K.
We use UV and extreme-UV emission lines observed in quiet regions on the solar disk with the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) instrument and the Extreme Ultraviolet Imaging Spectrometer (EIS) to determine the electron temperature in solar transition region plasmas. Prominent emission lines of O IV and O VI are present in…
Multi-spacecraft Observations of the 2008 January 2 CME in the Inner Heliosphere
Liu, Y.; Wu, S. T.; Feng, X. S. +4 more
We perform a detailed analysis of a coronal mass ejection (CME) on 2008 January 2. The combination of the Solar and Heliospheric Observatory and the twin STEREO spacecraft provides three-point observations of this CME. We track the CME in imaging observations and compare its morphology and kinematics viewed from different vantage points. The shape…