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Photometric Strömgren-Hβ Quantification for O and B Stars of Luminosity Class V

Paunzen, Ernst; Kaltcheva, Nadia; Golev, Valeri

In any photometric system, the relationship between the spectral type and the intrinsic colors is fundamental for the photometric stellar classification and for a reliable derivation of stellar parameters. Such relationships are being constantly verified and improved based on larger and better samples. The capability of the Strömgren-Hβ photometry…

Quasiperiodic field-aligned current dynamics associated with auroral undulations during a substorm recovery

Marghitu, O.; Vogt, J.; Bunescu, C. +2 more

A substorm recovery event in the early morning sector is explored by means of ground and spacecraft data. The ground data are provided by stations of the MIRACLE network, in northern Scandinavia and Svalbard, while spacecraft data are observed by the Cluster satellites, toward the end of the recovery phase. Additional information is provided by th…

Comet 67P/C-G seen through Osiris, the eyes of Rosetta

Barbieri, Cesare

The present paper will describe some of the highlights obtained by the imaging system Osiris on board the European spacecraft Rosetta during its cruise around comet 67P/Churyumov-Gerasimenko. Some results obtained by other instruments, including ground telescopes, will be briefly mentioned. The immense archive of data obtained during such unique c…

Latitude dependence of the solar granulation during the minimum of activity in 2009

Utz, D.; Hanslmeier, A.; Muller, R.

Context. Knowledge of the latitude variation of the solar granulation properties (contrast and scale) is useful to better understand interactions between magnetic field, convection, differential rotation, and meridional circulation in the solar atmosphere.
Aims: We investigated the latitude dependence of the contrast and scale of the solar gr…

Accuracy of Mykolaiv Asteroid Observations with Different Reference Catalogues

Maigurova, N. V.; Pomazan, A. V.; Bodryagin, D. V. +1 more

The results of astrometric reductions of main belt asteroid observations with usage of 3 different reference catalogues are presented. The high precision catalogs CMC15, UCAC4 and GAIA DR1 were used as reference catalogues for calculation asteroid equatorial coordinates. The asteroid observations were carried out at KT-50 telescope of the RI "MAO"…

The Radio-Far Infrared Correlation in the NEP Deep Field

Pearson, Chris; Barrufet, Laia; Serjeant, Stephen +6 more

We report the results of a multi-wavelength study in the North Ecliptic Pole (NEP) deep field and examine the far infrared-radio correlation (FIRC) for high and low redshift objects. We have found a correlation between the GMRT data at 610 MHz and the Herschel data at 250 µm that has been used to define a spectral index. This spectral index …

ATCA detections of massive molecular gas reservoirs in dusty, high-z radio galaxies

Ivison, R. J.; Cooray, A.; Ibar, E. +9 more

Observations using the 7-mm receiver system on the Australia Telescope Compact Array have revealed large reservoirs of molecular gas in two high-redshift radio galaxies: HATLAS J090426.9+015448 (z = 2.37) and HATLAS J140930.4+003803 (z = 2.04). Optically, the targets are very faint, and spectroscopy classifies them as narrow-line radio galaxies. I…

Characterization of the warm-hot intergalactic medium near the Coma cluster through high-resolution spectroscopy of X Comae

Bonamente, M.; Morandi, A.; Tempel, E. +2 more

We have analysed all available archival XMM-Newton observations of X Comae, a bright X-ray quasar behind the Coma cluster, to study the properties of the warm-hot intergalactic medium (WHIM) in the vicinity of the nearest massive galaxy cluster. The reflection grating spectrometer observations confirm the possible presence of a Ne ix K α absorptio…

Corrigendum to "Observation of Neon at mid and high latitudes in the sunlit Lunar Exosphere: Results from CHACE aboard MIP/Chandrayaan-1", Vol. 272 (2016), pp 206-211, doi 10.1016/j.icarus.2016.02.030

Bhardwaj, Anil; Sridharan, R.; Thampi, Smitha V. +2 more

Our paper titled "Observation of Neon at mid and high latitudes in the sunlit Lunar Exosphere: Results from CHACE aboard MIP/Chandrayaan-1" (Icarus 272 (2016) 206-211) presents the results of the observations on the distribution of neutral Neon in the mid and high lunar latitudes by the CHACE instrument aboard Moon Impact Probe (MIP) in Chandrayaa…

A parallel model for SQL astronomical databases based on solid state storage. Application to the Gaia Archive PostgreSQL database

González-Núñez, J.; Gutiérrez-Sánchez, R.; Segovia, J. C. +3 more

Query planning and optimisation algorithms in most popular relational databases were developed at the times hard disk drives were the only storage technology available. The advent of higher parallel random access capacity devices, such as solid state disks, opens up the way for intra-machine parallel computing over large datasets.

We describe…