Search Publications
Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts
Kneib, J. -P.; Smith, G. P.; Lutz, D. +36 more
We present preliminary results about the detection of high redshift (U)LIRGs in the Bullet cluster field by the PACS and SPIRE instruments within the Herschel Lensing Survey (HLS) Program. We describe in detail a photometric procedure designed to recover robust fluxes and deblend faint Herschel sources near the confusion noise. The method is based…
Formation of Coronal Holes on the Ashes of Active Regions
Karachik, Nina V.; Pevtsov, Alexei A.; Abramenko, Valentyna I.
We investigate the formation of isolated non-polar coronal holes (CHs) on the remnants of decaying active regions (ARs) at the minimum/early ascending phase of sunspot activity. We follow the evolution of four bipolar ARs and measure several parameters of their magnetic fields including total flux, imbalance, and compactness. As regions decay, the…
A Comprehensive Spectral Analysis of the X-Ray Pulsar 4U 1907+09 from Two Observations with the Suzaku X-ray Observatory
Fürst, Felix; Pottschmidt, Katja; Wilms, Jörn +7 more
We present results from two observations of the wind-accreting X-ray pulsar 4U 1907+09 using the Suzaku Observatory. The broadband time-averaged spectrum allows us to examine the continuum emission of the source and the cyclotron resonance scattering feature at ~19 keV. Additionally, using the narrow CCD response of Suzaku near 6 keV allows us to …
Viking observation of water vapor on Mars: Revision from up-to-date spectroscopy and atmospheric models
Montmessin, F.; Korablev, O.; Fedorova, A. A. +1 more
A reanalysis of the Mars Atmospheric Water Detector (MAWD, Viking 1 and 2 Orbiters) Planetary Data System (PDS) data set (Jakosky, B.M., Farmer, C.B. [1982]. J. Geophys. Res. 87 (B4), 2999-3019) is presented taking into account a new spectroscopic database and improved atmospheric model assumptions. Starting from HITRAN 2004 edition and later (Rot…
Massive Star Formation of the Sgr A East H II Regions Near the Galactic Center
Yusef-Zadeh, F.; Lacy, J. H.; Wardle, M. +4 more
A group of four compact H II regions associated with the well-known 50 km s-1 molecular cloud is the closest site of on-going star formation to the dynamical center of the Galaxy, at a projected distance of ~6 pc. We present a study of ionized gas based on the [Ne II] (12.8 µm) line, as well as multi-frequency radio continuum, Hub…
Determining the forsterite abundance of the dust around asymptotic giant branch stars
Waters, L. B. F. M.; Blommaert, J. A. D. L.; Min, M. +2 more
Aims: We present a diagnostic tool to determine the abundance of the crystalline silicate forsterite in AGB stars surrounded by a thick shell of silicate dust. Using six infrared spectra of high mass-loss oxygen rich AGB stars we obtain the forsterite abundance of their dust shells.
Methods: We use a monte carlo radiative transfer code t…
Multiwavelength Study of the M8.9/3B Solar Flare from AR NOAA 10960
Srivastava, A. K.; Filippov, B.; Kumar, Pankaj +1 more
We present a multiwavelength analysis of a long-duration, white-light solar flare (M8.9/3B) event that occurred on 04 June 2007 from AR NOAA 10960. The flare was observed by several spaceborne instruments, namely SOHO/MDI, Hinode/SOT, TRACE, and STEREO/SECCHI. The flare was initiated near a small, positive-polarity, satellite sunspot at the center…
Asymmetries in Saturn's radiation belts
Krupp, N.; Roussos, E.; Khurana, K. K. +10 more
We present both energetic proton and electron data from the main radiation belts of Saturn. When organized by L shell and equatorial pitch angle, data from Cassini's Magnetospheric Imaging Instrument reveal proton radiation belts that are highly symmetric in local time. The energetic electron radiation belts are asymmetric in two principal ways. U…
Solar Intranetwork Magnetic Elements: Evolution and Lifetime
Wang, J. X.; Zhou, G. P.; Jin, C. L.
Based on Hinode SOT/NFI observations with greatly improved spatial and temporal resolution and polarization sensitivity, the lifestory of the intranetwork (IN) magnetic elements are explored in a solar quiet region. A total of 2282 IN elements are followed from their appearance to disappearance and their fluxes measured. By tracing individual IN e…
On the Absolute Age of the Globular Cluster M92
Walker, A. R.; Weiss, A.; Prada Moroni, P. G. +15 more
We present precise and deep optical photometry of the globular M92. Data were collected in three different photometric systems: Sloan Digital Sky Survey (g‧, r‧, i‧, and z‧ MegaCam at CFHT), Johnson-Kron-Cousins (B, V, and I; various ground-based telescopes), and Advanced Camera for Surveys (ACS) Vegamag…