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Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B
Marocco, F.; Homeier, D.; Pinfield, D. J. +20 more
We have searched the Wide-field Infrared Survey Explorer first data release for widely separated (≤10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =-0.38 ± 0.06) primary BD +01° 2920 (HIP 703…
Comparison of line-by-line and band models of near-IR methane absorption applied to outer planet atmospheres
Sromovsky, L. A.; Fry, P. M.; Boudon, V. +2 more
Recent improvements in high spectral resolution measurements of methane absorption at wavenumbers between 4800 cm-1 and 7919 cm-1 have greatly increased the number of lines with known lower state energies, the number of weak lines, and the number of lines observed at low temperatures (Campargue, A., Wang, L., Kassi, S., Mašát…
The Nuclear Infrared Emission of Low-luminosity Active Galactic Nuclei
Colina, L.; Aretxaga, I.; Packham, C. +9 more
We present high-resolution mid-infrared (MIR) imaging, nuclear spectral energy distributions (SEDs), and archival Spitzer spectra for 22 low-luminosity active galactic nuclei (LLAGNs; L bol <~ 1042 erg s-1). Infrared (IR) observations may advance our understanding of the accretion flows in LLAGNs, the fate of th…
Assembly of the Red Sequence in Infrared-selected Galaxy Clusters from the IRAC Shallow Cluster Survey
Dey, Arjun; Jannuzi, Buell; Eisenhardt, Peter R. M. +9 more
We present results for the assembly and star formation histories (SFHs) of massive (~L*) red sequence galaxies (RSGs) in 11 spectroscopically confirmed, infrared-selected galaxy clusters at 1.0 < z < 1.5, the precursors to present-day massive clusters with M ~ 1015 M ⊙. Using rest-frame optical photometry, we investigat…
Behavior of Solar Cycles 23 and 24 Revealed by Microwave Observations
Gopalswamy, N.; Michalek, G.; Shibasaki, K. +3 more
Using magnetic and microwave butterfly diagrams, we compare the behavior of solar polar regions to show that (1) the polar magnetic field and the microwave brightness temperature during solar minimum substantially diminished during the cycle 23/24 minimum compared to the 22/23 minimum. (2) The polar microwave brightness temperature (Tb) seems to b…
HerMES: point source catalogues from deep Herschel-SPIRE observations
Pérez-Fournon, I.; Rodighiero, G.; Valtchanov, I. +38 more
We describe the generation of single-band point source catalogues from submillimetre Herschel-SPIRE observations taken as part of the Science Demonstration Phase of the Herschel Multi-tiered Extragalactic Survey (HerMES). Flux densities are found by means of peak finding and the fitting of a Gaussian point-response function. With highly confused i…
Wide-field imaging of NGC 4365's globular cluster system: the third subpopulation revisited
Spitler, Lee R.; Forbes, Duncan A.; Blom, Christina
Analysis of the globular cluster (GC) system of the giant elliptical (E3) galaxy NGC 4365, from eight Hubble Space Telescope/Advanced Camera for Surveys pointings and a wide-field Subaru/Suprime-Cam image, is presented. Using magnitude, colour and size criteria, we obtain a catalogue of GC candidates. We also measure the photometric properties of …
Spectroscopic Signature of Alfvén Waves Damping in a Polar Coronal Hole up to 0.4 Solar Radii
Bemporad, A.; Abbo, L.
Between 2009 February 24 and 25, the EUV Imaging Spectrometer (EIS) spectrometer on board the Hinode spacecraft performed special "sit and stare" observations above the south polar coronal hole continuously over more than 22 hr. Spectra were acquired with the 1'' slit placed off-limb covering altitudes up to 0.48 R ⊙ (3.34 × 102
Nanostructuration of carbonaceous dust as seen through the positions of the 6.2 and 7.7 µm AIBs
Dartois, E.; d'Hendecourt, L.; Brunetto, R. +7 more
Context. Carbonaceous cosmic dust is observed through infrared spectroscopy either in absorption or in emission. The details of the spectral features are believed to shed some light on its structure and finally enable the study of its life cycle.
Aims: The goal is to combine several analytical tools in order to decipher the intimate nanostruc…
Nuclear star clusters and the stellar spheroids of their host galaxies
Böker, Torsten; Knigge, Christian; Leigh, Nathan
We combine published photometry for the nuclear star clusters (NSCs) and stellar spheroids of 51 low-mass, early-type galaxies in the Virgo cluster with empirical mass-to-light ratios, in order to complement previous studies that explore the dependence of NSC masses on various properties of their host galaxies. We confirm a roughly linear relation…