Search Publications
Not-so-simple Stellar Populations in the Intermediate-age Large Magellanic Cloud Star Clusters NGC 1831 and NGC 1868
Deng, Licai; de Grijs, Richard; Li, Chengyuan
Using a combination of high-resolution Hubble Space Telescope/Wide-Field and Planetary Camera-2 observations, we explore the physical properties of the stellar populations in two intermediate-age star clusters, NGC 1831 and NGC 1868, in the Large Magellanic Cloud based on their color-magnitude diagrams. We show that both clusters exhibit extended …
High-resolution Submillimeter and Near-infrared Studies of the Transition Disk around Sz 91
Henning, Thomas; Terada, Hiroshi; Usuda, Tomonori +55 more
To reveal the structures of a transition disk around a young stellar object in Lupus, Sz 91 , we have performed aperture synthesis 345 GHz continuum and CO(3-2) observations with the Submillimeter Array (~1''-3'' resolution) and high-resolution imaging of polarized intensity at the Ks -band using the HiCIAO instrument on the Subaru Tele…
X-Ray and γ-Ray Studies of the Millisecond Pulsar and Possible X-Ray Binary/Radio Pulsar Transition Object PSR J1723-2837
Esposito, Paolo; Bogdanov, Slavko; McLaughlin, Maura A. +3 more
We present X-ray observations of the "redback" eclipsing radio millisecond pulsar (MSP) and candidate radio pulsar/X-ray binary transition object PSR J1723-2837. The X-ray emission from the system is predominantly non-thermal and exhibits pronounced variability as a function of orbital phase, with a factor of ~2 reduction in brightness around supe…
X-ray spectral variability of LINERs selected from the Palomar sample
González-Martín, O.; Márquez, I.; Masegosa, J. +1 more
Context. Variability is a general property of active galactic nuclei (AGN). The way in which these changes occur at X-rays is not yet clearly understood. In the particular case of low-ionization nuclear emission line region (LINER) nuclei, variations on the timescales from months to years have been found for some objects, but the main driver of th…
Coronal-Temperature-Diagnostic Capability of the Hinode/ X-Ray Telescope Based on Self-consistent Calibration. II. Calibration with On-Orbit Data
Weber, M.; Winebarger, A.; Kano, R. +4 more
The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager that observes the solar corona with the capability of diagnosing coronal temperatures from less than 1 MK to more than 10 MK. To make full use of this capability, Narukage et al. (Solar Phys.269, 169, 2011) determined the thickness of each of the X-ray focal-plane analysis f…
Shape of scoria cones on Mars: Insights from numerical modeling of ballistic pathways
Hauber, Ernst; Rossi, Angelo Pio; Čadek, Ondřej +1 more
Morphological observations of scoria cones on Mars show that their cross-sectional shapes are different from those on Earth. Due to lower gravity and atmospheric pressure on Mars, particles are spread over a larger area than on Earth. Hence, erupted volumes are typically not large enough for the flank slopes to attain the angle of repose, in contr…
The Comparison of Physical Properties Derived from Gas and Dust in a Massive Star-forming Region
Ginsburg, Adam; Battersby, Cara; Bally, John +3 more
We explore the relationship between gas and dust in a massive star-forming region by comparing the physical properties derived from each. We compare the temperatures and column densities in a massive star-forming Infrared Dark Cloud (G32.02+0.05), which shows a range of evolutionary states, from quiescent to active. The gas properties were derived…
The Revised IRAS-FSC Redshift Catalogue (RIFSCz)
Han, Jiaxin; Wang, Lingyu; Norberg, Peder +2 more
We present a Revised IRAS-FSC Redshift Catalogue (RIFSCz) of 60 303 galaxies selected at 60 µm from the IRAS Faint Source Catalog (FSC). This revision merges in data from the Wide-field Infrared Survey Explorer All-Sky Data Release, the tenth Sloan Digital Sky Survey Data Release (DR10), the GALEX All-Sky Survey Source Catalog (GASC), the 2M…
Herschel reveals a molecular outflow in a z = 2.3 ULIRG
Valtchanov, I.; Ivison, R. J.; Smail, Ian +6 more
We report the results from a 19-h integration with the Spectral and Photometric Imaging REceiver (SPIRE) Fourier Transform Spectrometer aboard the Herschel Space Observatory which has revealed the presence of a molecular outflow from the Cosmic Eyelash (SMM J2135-0102) via the detection of blueshifted OH absorption. Detections of several fine-stru…
Interannual observations and quantification of summertime H2O ice deposition on the Martian CO2 ice south polar cap
Brown, Adrian J.; Piqueux, Sylvain; Titus, Timothy N.
The spectral signature of water ice was observed on Martian south polar cap in 2004 by the Observatoire pour l'Mineralogie, l'Eau les Glaces et l'Activite (OMEGA) (Bibring et al., 2004). Three years later, the OMEGA instrument was used to discover water ice deposited during southern summer on the polar cap (Langevin et al., 2007). However, tempora…