Search Publications
Classifying the stellar environment around V838 Monocerotis
Schaefer, G. H.; Rosero-Rueda, V. A.; Bond, H. E. +2 more
The V838 Mon's behavior and the nature of the progenitor object are not well understood. Type B stars recently have been found in the vicinity of V838 Mon and it is thought that they may be part of a young open cluster. Since the cluster is in a spiral arm of the Galaxy, the identification of additional member stars is complicated; therefore, phot…
QSO number counts to B < 24.5 from hubble space telescope WFPC2 images
Anderson, Scott F.; Beck-Winchatz, Bernhard
We have conducted a survey for faint quasars to B < 24.5, z < 2.1 based on archival high-latitude Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) images covering 0.04 deg2 of the sky in three filters spanning 2300 9600 Å. Taking advantage of the superb 0.1″ resolution of WFPC2, we have developed an approach to select …
Cross-identification of the hipparcos and 2MASS catalogs. Algorithm and programs
Zolotukhina, A. V.; Lazorenko, P. F.; Kharin, A. S.
A procedure for the cross-identification of the Hipparcos and 2MASS catalogs was developed. The algorithm and the cross-identification software are described.
Spectroscopic observations of coronal waves and coronal mass ejections
Harra, L. K.
It is common to use imaging instruments such as EUV and X-ray imagers and coronagraphs to study large-scale phenomena such as coronal mass ejections and coronal waves. Although high resolution spectroscopy is generally limited to a small field of view, its importance in understanding global phenomena should not be under-estimated. I will review cu…
High resolution X-ray spectroscopy and chemical evolution in elliptical galaxies
Loewenstein, Michael; Davis, David S.
We discuss the elemental composition in the hot ISM of elliptical galaxies derived from new and recent X-ray spectral analysis in the context of new phenomenological models of their chemical evolution. Star formation histories, the IMF, the astrophysics of supernovae, and the nature of galactic winds impact the metal content and relative abundance…
Suzaku View of Powerful Gamma-Ray Quasars
Kataoka, Jun
We present the results from multiwavelength campaigns of three powerful gamma-ray quasars, PKS 1510-089, RBS 315 and Swift J0746.3+2548, recently organized with Suzaku. The Suzaku observation provided one of the highest S/N X-ray spectra ever reported between 0.3 and 50 keV. For these quasars, the X-ray spectrum is well represented by an extremely…
The magnetic field near Mars: A comparison between a hybrid model, Mars Global Surveyor and Mars Express observations
Kallio, E.; Fedorov, A.; Janhunen, P. +5 more
Mars Express (MEX) does not carry its own magnetometer which complicates interpretation of ASPERA-3/MEX ion measurements. The direction of the interplanetary magnetic field (IMF) is especially important because it, among other things, determines the direction of the convective electric field and orientation of the cross tail current sheet and tail…
Two-dimensional structure and kinematics of a representative sample of low-z ULIRGs
Colina, L.; Arribas, S.; García-Marín, M.
We present the optical INTEGRAL integral field spectroscopy data and Hubble Space Telescope archive images obtained for a representative sample of 22 local Ultraluminous Infrared Galaxies (ULIRGs LIR >1012Lodot). The sample has been designed for fulfilling a program aimed at studying the internal structure and k…
Galactic X-ray source populations
Motch, C.
The landscape of Galactic X-ray sources made of accreting binaries, isolated objects and active stellar coronae has been significantly modified by the advent of the Chandra, XMM-Newton and INTEGRAL satellites. New types of relatively low X-ray luminosity X-ray binaries have been unveiled in the Galactic disc, while deep observations of the central…
Characters of the magnetotail plasma injection surveyed from Cluster observation
Liu, X.; Liu, Z. X.; Shen, C. +2 more