Search results for "GAL"
showing 10 items of 9260 documents
The close classical T Tauri binary V4046 Sgr: Complex magnetic fields & distributed mass accretion
2011
We report here the first results of a multi-wavelength campaign focussing on magnetospheric accretion processes within the close binary system V4046 Sgr, hosting two partly-convective classical T Tauri stars of masses ~0.9 Msun and age ~12 Myr. In this paper, we present time-resolved spectropolarimetric observations collected in 2009 September with ESPaDOnS at the Canada-France-Hawaii Telescope (CFHT) and covering a full span of 7d or ~2.5 orbital/rotational cycles of V4046 Sgr. Small circularly polarised Zeeman signatures are detected in the photospheric absorption lines but not in the accretion-powered emission lines of V4046 Sgr, thereby demonstrating that both system components host lar…
Evidence of a non-conservative mass transfer in the ultra-compact X-ray source XB 1916-053
2020
The dipping source XB 1916-053 is a compact binary system with an orbital period of 50 min harboring a neutron star. Using ten new {\it Chandra} observations and one {\it Swift/XRT} observation, we are able to extend the baseline of the orbital ephemeris; this allows us to exclude some models that explain the dip arrival times. The Chandra observations provide a good plasma diagnostic of the ionized absorber and allow us to determine whether it is placed at the outer rim of the accretion disk or closer to the compact object. From the available observations we are able to obtain three new dip arrival times extending the baseline of the orbital ephemeris from 37 to 40 years. From the analysis…
ARGUMENTS FOR THE ESTABLISHMENT OF A SOVEREIGN INVESTMENT FUND IN ROMANIA
2013
The creation of the national development fund was approved in 2006 through the specific legislation. The main argument in supporting the idea of creating this fund was the fact that Romania still had to privatize some more governmental ownership companies and the sums that would be obtained were going to be used according to some very precise rules. Another argument was that the executive power had to assure the financing of some major infrastructure investment projects, to assure the local contribution of the project financed by structural funds and to assure de necessary funds for solving the problems caused by the retrocession of some buildings. The audit report of the Romanian Court of …
The ALHAMBRA survey: evolution of galaxy clustering since z∼1
2014
We study the clustering of galaxies as function of luminosity and redshift in the range $0.35 < z < 1.25$ using data from the Advanced Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) survey. The ALHAMBRA data used in this work cover $2.38 \mathrm{deg}^2$ in 7 independent fields, after applying a detailed angular selection mask, with accurate photometric redshifts, $��_z \lesssim 0.014 (1+z)$, down to $I_{\rm AB} < 24$. Given the depth of the survey, we select samples in $B$-band luminosity down to $L^{\rm th} \simeq 0.16 L^{*}$ at $z = 0.9$. We measure the real-space clustering using the projected correlation function, accounting for photometric redshifts uncert…
THE ALHAMBRA SURVEY: EVOLUTION OF GALAXY SPECTRAL SEGREGATION
2016
arXiv:1601.03668v1
Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
2021
Ilbert, O., et al. (Euclid Collaboration)
Measuring galaxy segregation with the mark connection function
2010
(abridged) The clustering properties of galaxies belonging to different luminosity ranges or having different morphological types are different. These characteristics or `marks' permit to understand the galaxy catalogs that carry all this information as realizations of marked point processes. Many attempts have been presented to quantify the dependence of the clustering of galaxies on their inner properties. The present paper summarizes methods on spatial marked statistics used in cosmology to disentangle luminosity, colour or morphological segregation and introduces a new one in this context, the mark connection function. The methods used here are the partial correlation functions, includi…
A photometric study of Be stars located in the seismology fields of COROT
2007
Context: In preparation for the COROT mission, an exhaustive photometric study of Be stars located in the seismology fields of the COROT mission has been performed. The very precise and long-time-spanned photometric observations gathered by the COROT satellite will give important clues of the origin of the Be phenomenon. Aims: The aim of this work is to find short-period variable Be stars located in the seismology fields of COROT and to study and characterise their pulsational properties. Methods: Light curves obtained at the Observatorio de Sierra Nevada together with data from Hipparcos and ASAS-3 of a total of 84 Be stars have been analysed in order to search for short-term variations. W…
Stato di emergenza e legalità costituzionale alla prova della pandemia
2022
The need to outline a satisfactory relationship between emergency and constitutional legality has accompanied the evolution of public law, posing questions that are not fully resolved. The debate on the issue is back in vogue with the pandemic emergency, in relation to the issues related to containment measures. The paper traces the related matter, also in light of the interpretation offered by the judgments that the Constitutional Court has pronounced, in particular in relation to the territorial balance of emergency powers and the system of sources of law.
Stimula kontrasta un virziena ietekme uz sakādisko acu kustību parametriem
2022
Darbs ir uzrakstīts latviešu valodā uz 41 lapaspusēm. Tas satur 25 attēlus, 2 tabulas, 3 pielikumus un 46 atsauces uz literatūras avotiem. Darba mērķis ir novērtēt stimula kontrasta un virziena ietekmi uz sakāžu parametriem (sakādisko acu kustību latences, precizitātes un maksimālā ātruma rādītājiem). Pētījumā piedalījās 15 dalībnieki (no 21 līdz 29 gadiem). Acu kustibas tika pierakstītas ar Tobii Pro Fusion acu kustību pieraksta iekārtu (250Hz). Sakādisko acu kustību stimuli ar dažādiem kontrasta līmeņiem tika demonstrēti uz četriem dažādiem foniem četros dažādos virzienos. Rezultāti norāda būtisku stimula virziena ietekmi uz latenci un maksimālo ātrumu pelēkā fonā 30 cd/m2 (negatīva un po…