Search Publications
Missions
Journals
Publication Years
Infrared study of infrared carbon stars based on 2MASS, IRAS and ISO SWS data
Chen, Pei-Sheng; Shan, Hong-Guang
For this paper, we collected all infrared carbon stars (IRCSs) known so far from the literature and identified the 2MASS counterparts of all IRCSs. Using 2MASS, IRAS and ISO SWS data, we investigate the infrared properties of IRCSs. We find that the infrared colors and temperatures of IRCSs—not only in the IRAS region but also in the near infrared…
Detection of X-Ray Elongated Emission from AN Ultraluminous X-Ray Source in the Interacting Pair of Galaxies NGC 5953/5954
Ghosh, Kajal K.; Rosado, Margarita; Fuentes-Carrera, Isaura
We present radio through X-ray observations of a bright (>1040 erg s-1 in the 0.5-8.0 keV band) ultraluminous X-ray source (ULX), CXOU J153434.9+151149, in the starburst, interacting pair of galaxies NGC 5953/5954. A Chandra image of this ULX shows that it is elongated. From HST/WFPC2/F606W data we have detected a counterp…
Reciprocal Vectors
Vogt, Joachim; Paschmann, Gotz; Chanteur, Gérard
Reciprocal vectors and barycentric coordinates are well-established concepts in various scientific fields, where lattices and grids are essential, e.g., in solid state physics, crystallography, in the numerical analysis of partial differential equations using finite elements, and also in computer graphics and visualisation. In preparation of the C…
XMM-Newton observations of the low-mass X-ray binary XB 1832-330 in the galactic globular cluster NGC 6652
Parmar, A. N.; Sidoli, L.; La Palombara, N. +1 more
Context: We report on two XMM-Newton observations performed in 2006 of the luminous low-mass X-ray binary XB 1832-330, which is located in the galactic globular cluster NGC 6652 and is probably an ultracompact binary (orbital period, P_orb, of <1 h).
Aims: The aim of these observations is to investigate the low-energy absorption towards XB …
Diagnostics of inhomogeneous stellar jets. Convolution effects and data reconstruction
Raga, A. C.; Del Burgo, C.; de Colle, F.
Context: In the interpretation of stellar jet observations, the physical parameters are usually determined from emission line ratios, obtained from spectroscopic observations or using the information contained in narrow band images. The basic hypothesis in the interpretation of the observations is that the emitting region is homogeneous along the …
Spatial Extension in the Ultraviolet Spectrum of VV Cephei
Bennett, Philip D.; Gull, Theodore R.; Hagen Bauer, Wendy
Two-dimensional processing of Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) echelle spectra of the eclipsing M2 Iab + B binary system, VV Cep, has revealed extended emission in all 21 epochs observed, ranging from midtotality through the first quadrature. In the ultraviolet accessible to STIS (1150- 3150 Å), essentially al…
Sunward propagating Pc5 waves observed on the post-midnight magnetospheric flank
Glassmeier, K. -H.; Blomberg, L. G.; Schaefer, S. +1 more
The overall focus on the driver of toroidal Pc5 waves has been on processes located at or acting on the dayside magnetopause and dayside flanks of the magnetosphere. These processes can generate waves that propagate tailward in the magnetosphere. However, an increasing number of studies, both theoretical and experimental, have looked at waves prop…
The Ringed Spiral Galaxy NGC4622. II. An Independent Determination that the Two Outer Arms Lead
Byrd, Gene G.; Freeman, Tarsh; Buta, Ronald J. +1 more
The spiral galaxy NGC4622 was recognized by Byrd et al. (1989, Celest. Mech., 45, 31) to have a single inner arm winding outward counterclockwise (CCW) and an outer pair of arms winding outward clockwise (CW). Using HST and ground-based observations, Buta et al. (2003, AJ, 125, 634) used a dust silhouette method to determine that the disk of NGC46…
The Curlometer and Other Gradient Based Methods
Eastwood, Jonathan P.; Dunlop, Malcolm W.
The magnetic field measurements on the four Cluster spacecraft can be combined to produce a determination of the electric current density, j, point by point in time, from Ampere's law, i.e., through an estimate of the curl of the magnetic field, B, assuming the displacement current may be neglected (an assumption nearly always true in space plasma…
Ground-based variability surveys towards Centaurus A: worthwhile or not?
Héraudeau, P.; de Jong, J. T. A.; Kuijken, K. H.
Context: Difference imaging has proven to be a powerful technique for detecting and monitoring the variability of unresolved stellar sources in M 31. Using this technique in surveys of galaxies outside the Local Group could have many interesting applications.
Aims: The goal of this paper is to test difference imaging photometry on Centaurus A,…