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Deep multiband surface photometry on a sample of 24 blue compact galaxies. II. A volume-limited sample of 21 emission line galaxies
Östlin, G.; Zackrisson, E.; Bergvall, N. +6 more
Aims: We present deep surface photometry of a volume-limited sample of 21 UM emission line galaxies in broadband optical UBVRI and near infrared (NIR) HKs filters. The sample comprises 19 blue compact galaxies (BCGs) and two spirals.
Methods: We separated the burst and host populations for each galaxy and compared them to stellar evoluti…
Earliest recorded ground-based decameter wavelength observations of Saturn's lightning during the giant E-storm detected by Cassini spacecraft in early 2006
Gurnett, D. A.; Kurth, W. S.; Rucker, H. O. +12 more
We report the history of the first recorded ground-based radio detection of Saturn's lightning using the Ukrainian UTR-2 radiotelescope at frequencies from 20 to 25 MHz. The observations were performed between 29 January and 3 February 2006, during which lighting activity (E-storm) on Saturn was detected by the radio experiment onboard Cassini spa…
Uncovering Drivers of Disk Assembly: Bulgeless Galaxies and the Stellar Mass Tully-Fisher Relation
Ellis, Richard S.; Miller, Sarah H.; Sullivan, Mark
In order to determine what processes govern the assembly history of galaxies with rotating disks, we examine the stellar mass Tully-Fisher (TF) relation over a wide range in redshift partitioned according to whether or not galaxies contain a prominent bulge. Using our earlier Keck spectroscopic sample, for which bulge/total parameters are availabl…
The two-micron spectral characteristics of the Titanian haze derived from Cassini/VIMS solar occultation spectra
Kim, Sang Joon; Courtin, Régis; Sim, Chae Kyung +2 more
Vertically-resolved spectral characteristics of the Titanian haze in the 2-µm wavelength range were derived from solar occultation spectra measured by Cassini/VIMS on January 15, 2006. At the various altitudes probed by the solar occultation measurements, we reproduced the observed spectra using a radiative transfer program including absorpt…
Refilling process in the plasmasphere: a 3-D statistical characterization based on Cluster density observations
Lointier, G.; Rauch, J. -L.; Décréau, P. M. E. +4 more
The Cluster mission offers an excellent opportunity to investigate the evolution of the plasma population in a large part of the inner magnetosphere, explored near its orbit's perigee, over a complete solar cycle. The WHISPER sounder, on board each satellite of the mission, is particularly suitable to study the electron density in this region, bet…
Discovery of the spectroscopic binary nature of six southern Cepheids
Szabados, L.; Derekas, A.; Kovács, J. +6 more
We present the analysis of photometric and spectroscopic data of six bright Galactic Cepheids: GH Carinae, V419 Centauri, V898 Centauri, AD Puppis, AY Sagittarii and ST Velorum. Based on new radial velocity data (in some cases supplemented with earlier data available in the literature), these Cepheids have been found to be members in spectroscopic…
GOLIA: An INTEGRAL archive at INAF-IASF Milano
Götz, D.; Mereghetti, S.; Sidoli, L. +5 more
We present the archive of the INTEGRAL data developed and maintained at INAF-IASF Milano. The archive comprises all the public data currently available (revolutions 0026-1079, i.e., December 2002-August 2011). INTEGRAL data are downloaded from the ISDC Data Centre for Astrophysics, Geneva, on a regular basis as they become public and a customized …
Patterned ground in martian high northern latitudes: Morphology and age constraints
Korteniemi, J.; Kreslavsky, M. A.
We performed a systematic survey of typical surface patterns and small (5-50 m) impact craters in a zone between 50° and 70° latitude in the Northern Lowlands of Mars. We found that small-scale (<10 m) polygonal pattern formed by narrow fractures is typical in the northern half of the studied zone. We interpret this pattern to be formed by acti…
Double cusp encounter by Cluster: double cusp or motion of the cusp?
Berchem, J.; Escoubet, C. P.; Pitout, F. +12 more
Modelling plasma entry in the polar cusp has been successful in reproducing ion dispersions observed in the cusp at low and mid-altitudes. The use of a realistic convection pattern, when the IMF-By is large and stable, allowed Wing et al. (2001) to predict double cusp signatures that were subsequently observed by the DMSP spacecraft. In…
Revisiting SW J2000.6+3210: a persistent Be X-ray pulsar?
Maitra, Chandreyee; Paul, Biswajit; Pradhan, Pragati +1 more
We present a detailed timing and spectral analysis of the Be X-ray binary SW J2000.6+3210 discovered by the Burst Alert Telescope Galactic plane survey. Two Suzaku observations of the source made at six months interval, reveal pulsations at ∼890 s for both observations with a much weaker pulse fraction in the second one. Pulsations are clearly see…