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The evolution of Ks-selected galaxies in the GOODS/CDFS deep ISAAC field
McLure, R. J.; Dunlop, J. S.; Caputi, K. I. +1 more
We present estimated redshifts and derived properties of a sample of 1663 galaxies with Ks<= 22 (Vega), selected from 50.4 arcmin2 of the Great Observatories Origins Deep Survey/Chandra Deep Field South (GOODS/CDFS) field with deep Infrared Spectrometer and Array Camera (ISAAC) imaging, and make an extensive comparison of …
XMM-Newton observations of SS 433 I. EPIC spectral analysis
Kawai, N.; Brinkmann, W.; Kotani, T.
SS433 was observed with XMM-Newton in four consecutive orbits at different binary phases at precessional phases near maximum blue-/red shift between April 2 and April 8, 2003. The light curves in the individual orbits are flat without statistically significant indications for short-term (⪆50 s) intrinsic variability. Orbit-to-orbit flux changes oc…
Projection of circumstellar disks on their environments
Pontoppidan, K. M.; Dullemond, C. P.
We use a 3D Monte Carlo radiative transfer code to study the projection of large shadows by circumstellar disks around young stellar objects on surrounding reflection nebulosity. It is shown that for a wide range of parameters a small (10-100 AU) circumstellar disk can project a large (1000-10 000 AU) dark band in the near-infrared that often rese…
Dynamic Harris current sheet thickness from Cluster current density and plasma measurements
Balogh, A.; Khurana, K. K.; Kistler, L. M. +5 more
We use the first accurate measurements of current densities in the plasma sheet to calculate the half-thickness and position of the current sheet as a function of time. Our technique assumes a Harris current sheet model, which is parameterized by lobe magnetic field B0, current sheet half-thickness h, and current sheet position z0<…
Secular light curve of Comet 28P/Neujmin 1 and of spacecraft target Comets 1P/Halley, 9P/Tempel 1, 19P/Borrelly, 21P/Giacobinni Zinner, 26P/Grigg Skjellerup, 67P/Churyumov Gerasimenko, and 81P/Wild 2
Ferrín, Ignacio
We present the secular light curves of eight comets listed in the title. Two plots per comet are needed to study these objects: a reduced magnitude (to Δ=1 AU = geocentric distance) vs time, and a reduced magnitude vs Log R ( R=heliocentric distance). A total of over 16 new parameters, are measured from both plots, and give an unprecedented amount…
How To Use Magnetic Field Information For Coronal Loop Identification
Solanki, S. K.; Inhester, B.; Lagg, A. +1 more
The structure of the solar corona is dominated by the magnetic field because the magnetic pressure is about four orders of magnitude higher than the plasma pressure. Due to the high conductivity the emitting coronal plasma (visible, e.g., in SOHO/EIT) outlines the magnetic field lines. The gradient of the emitting plasma structures is significantl…
Phosphorus in the diffuse interstellar medium
Lebouteiller, V.; Ferlet, R.; Kuassivi
We present FUSE and HST/STIS measurements of the P ii column density toward Galactic stars. We analyzed P ii through the profile fitting of the unsaturated λ1125 and λ1533 lines and derived column densities integrated along the sightlines as well as in individual resolved components. We find that phosphorus is not depleted along those sightlines s…
Chandra Study of X-Ray Point Sources in the Early-Type Galaxy NGC 4552 (M89)
Kundu, Arunav; Xu, Haiguang; Zhang, Zhongli +3 more
We present a Chandra ACIS study of the early-type galaxy NGC 4552. We detect 47 X-ray point sources, most of which are likely low-mass X-ray binaries (LMXBs), within four effective radii (Re). The brightest X-ray source coincides with the optical, UV, and radio center of the galaxy and shows variability on >1 hr timescales, indicatin…
Tycho-2 stars with infrared excess in the MSX Point Source Catalogue
Lumsden, S. L.; Oudmaijer, R. D.; Clarke, A. J.
Stars of all evolutionary phases have been found to have excess infrared emission due to the presence of circumstellar material. To identify such stars, we have positionally correlated the infrared Mid-Course Space Experiment (MSX) Point Source Catalogue and the Tycho-2 optical catalogue. Near-mid-infrared colour criteria have been developed to se…
Submillimeter Array Observations of Disks in the SR 24 Multiple Star System
Andrews, Sean M.; Williams, Jonathan P.
We present high-resolution aperture synthesis images from the Submillimeter Array of the 225 GHz (1.3 mm) continuum and 12CO J=2-1 line emission from the disks around components of the hierarchical triple system SR 24, located in the Ophiuchus star-forming region. The most widely separated component, SR 24 S (with a projected semimajor …