Search Publications
The CIB-lensing bispectrum: impact on primordial non-Gaussianity and detectability for the Planck mission
Curto, A.; Kunz, M.; Martínez-González, E. +1 more
We characterize the cosmic infrared background (CIB)-lensing bispectrum which is one of the contributions to the three-point functions of cosmic microwave background (CMB) maps in harmonic space. We show that the CIB-lensing bispectrum has a considerable strength and that it can be detected with high significance in the Planck high-frequency maps.…
Late-time spectroscopy of SN 2002hh: a continued visible light echo with no shock interaction yet
Smith, Nathan; Mauerhan, Jon C.; Andrews, J. E.
Supernova (SN) 2002hh was unusual among core-collapse SNe because it was highly reddened, and displayed a bright infrared (IR) excess due to radiatively heated dust in its circumstellar medium (CSM). Estimates for the mass of dust responsible for the IR echo suggested the presence of a massive shell within 0.26 pc of the star. For a velocity of 50…
Wide-Field Variability Survey of the Globular Cluster M 79 and a New Period-Luminosity Relation for SX Phe Stars
Kopacki, G.
We present the results of a search for variable stars in a 26×39 arcmin2 field around globular cluster M 79 (NGC 1904). The search was made by means of an extended version of image subtraction, which allows us to analyze in a uniform manner CCD frames obtained with different telescopes and cameras of different sizes and resolutions. The…
Cosmological constraints on galaxy cluster structure
Alcaniz, J. S.; Holanda, R. F. L.
Observations of galaxy clusters (GC's) are a powerful tool to probe the evolution of the Universe at z < 2 . However, the real shape and structure of these objects are not completely understood and the assumption of asphericity is often used in several cosmological tests. In this work, we propose methods to infer the elongation of the gas distr…
Mars atmospheric losses induced by the solar wind: Comparison of observations with models
Vaisberg, Oleg
With new results from Mars-Express on plasma environment of Mars and two new Mars satellites the study Martian atmospheric losses receives new attention. Paper summarizes experimental results concentrating on configuration of Martian magnetosphere and the measurements of planetary ion escape induced by the solar wind. Several plasma populations co…
Ultraviolet ISM Diagnostics for Star-forming Galaxies. I. Tracers of Metallicity and Extinction
Leitherer, Claus; Danforth, Charles W.; Zetterlund, Erika +1 more
We have observed a sample of 14 nearby (z∼ 0.03) star-forming blue compact galaxies (BCGs) in the rest-frame far-UV (∼1150-2200 Å) using the Cosmic Origins Spectrograph on the Hubble Space Telescope. We have also generated a grid of stellar population synthesis models using the Starburst99 evolutionary synthesis code, allowing us to compare observ…
Rotation of sunspots in active region NOAA 10930
Gopasyuk, O. S.
The rotation of sunspots of the active region NOAA 10930 has been investigated using a time series of vector magnetic field maps from the Solar Optical Telescope aboard Hinode. The vertical, radial and azimuthal axisymmetrical components of the magnetic field vector have been reconstructed from the magnetic field line-of-sight component for both s…
Doppler winds mapped around the lower thermospheric terminator of Venus: 2012 solar transit observations from the James Clerk Maxwell Telescope
Clancy, R. Todd; Sandor, Brad J.; Hoge, James
Doppler shifts of sub-millimeter 12 CO (346 GHz) and 13 CO (330 GHz) and millimeter 12 CO (230 GHz) line absorptions were mapped around the circum-disk terminator of Venus before, during, and after the June 5, 2012 solar transit, employing the James Clerk Maxwell Telescope (JCMT). Radiative transfer analysis of the…
Centaurus A: constraints on the nature of the giant lobe filaments from XMM-Newton observations
Croston, Judith H.; Hardcastle, Martin J.; Wykes, Sarka
We report on deep XMM-Newton observations of the vertex filament in the southern giant lobe of the Fanaroff-Riley class I radio galaxy Centaurus A. We find no X-ray excess from the filament region and place a 3σ upper limit on the 1 keV flux density of the filament of 9.6 nJy. This directly constrains the electron density and magnetic field streng…
Star Cluster Disruption in the Starburst Galaxy Messier 82
de Grijs, Richard; Li, Chengyuan; Li, Shuo +1 more
Using high-resolution, multiple-passband Hubble Space Telescope images spanning the entire optical/near-infrared wavelength range, we obtained a statistically complete U-band-selected sample of 846 extended star clusters across the disk of the nearby starburst galaxy M82. Based on a careful analysis of the clusters' spectral energy distributions, …