Search Publications
Optical SBFs of shell galaxies.
Cantiello, M.; Brocato, E.; Raimondo, G. +1 more
We measure F814W Surface Brightness Fluctuations (SBFs) for a sample of distant shell galaxies observed with the Advanced Camera for Survey (ACS) on board of HST. To evaluate the distance at galaxies, theoretical SBF magnitudes for the ACS@HST filters are computed for single-burst stellar populations covering a wide range of ages (1.5\div 14 Gyr) …
Metal-line system survey: characterizing the low-redshift IGM
Cooksey, Kathy L.; Prochaska, Jason X.
The low-redshift IGM probes the last ten billion years of metal enrichment from galactic feedback processes. We present preliminary results from a survey of intergalactic metal-line absorption systems in archival HST STIS, GHRS, and FUSE spectra of ≈50 z≲2 UV-bright objects. We summarize the detailed analysis of one sightline (PKS1302–102, zQ…
Turkish National Observatory (TUG) View of Clusters of Galaxies
Hudaverdi, M.; Ercan, E. N.; Bozkurt, M. +2 more
We present the results of the optical observations of clusters of galaxies trough photometric observations with RTT150 telescope. We have selected a sample of 10 nearby (z < 1.2) Abell clusters from the northern sky. Properties of the extended X-ray intra-cluster medium (ICM) are studied using Chandra and XMM-Newton archival data. Considering p…
Investigation of the Mars Express HRSC color channel calibration
McCord, Thomas B.; Combe, Jean-Philippe
The High Resolution Stereo Camera (HRSC) onboard the Mars Express spacecraft in orbit about Mars has four detector channels dedicated to produce images in four spectral channels. Utilizing these spectrophotometric data requires understanding the instrument radiometric calibration and other photometric properties of the data. We present here some r…
Triangulation of CME Source Region Locations on the Sun and Dependence on Spacecraft Observation Angles
Temmer, M.; Hanslmeier, A.; Preiss, S.
STEREO-A, STEREO-B, and LASCO/SOHO observe coronal mass ejections (CMEs) from three different vantage points. On the basis of the radial plane-of-sky (POS) measurements of a CME in these three projection planes, the CME source region (SR) location was determined using the triangulation method of Temmeretal2009. As this triangulation method needs d…
Cassini Altimetric Data Processing
Gim, Y.; Orosei, R.; Picardi, G. +9 more
The Cassini mission, that is a joint NASA/ESA/ASI effort, has recently offered the unique possibility of exploring Titan, the largest moon of Saturn, that is the only satellite in the solar system to host an appreciable atmosphere, which unfortunately made the surface below very difficult to be observed from the Earth, with optical instruments. In…
Galaxy-galaxy interactions as triggers of star formation
Popescu, N. A.
Galaxy-galaxy interactions represent the main physical processes that trigger substantial star formation in galaxies. In order to study the galaxy interactions effects on color and morphology of the galaxies in the fields of two radio galaxies at z∼ 1, we combined optical-NIR photometry and HST/WFPC2 morphology data from the Stanford et al. (2002)…
Web-Based Approach to the Integral Data
Münz, Filip; Kocka, Matúš
Our extensive exploration of the INTEGRAL data in gamma and X-ray domains had two principal aims: to cover as many sources of chosen categories as possible (with sufficient upper limits of their fluxes) and to check for their eventual variability. This means treating a large number of time-resolved results that can be most easily approached using …
The Variable 6307 Å Emission Line in the Spectrum of Eta Carinae: Blueshifted [S III] λ6313 from the Interacting Winds
Gull, T. R.
The 6307 Å emission line in the spectrum of η Car, found by Martin et al., is blue-shifted [S iii] λ6313 emission originating from the outer wind structures of the massive binary system. We realized the identification while analyzing multiple forbidden emission lines not normally seen in the spectra of massive stars. The high spatial and moderate …