... A test for the determination of the nature of the generation of spiral arms in galaxies is proposed. ... Studies of the dependence of the shape of spiral arms on the nature of the mechanism for their generation (gravitational or hydrodynamic) are currently lacking; as shown in this paper, the locations of vortices relative to the spiral arms, together with the observed rotation curve, may serve as a promising test to address this question. ...

... Radiative Transfer & Galaxy modelling . 09:30- 10:00 Nick Kylafis - Radiative transfer in spiral galaxies . ... 10:30- 11:00 Coffee break . ... 12:00- 12:30 Angelos Misiriotis - Dust in near-by edge-on spiral galaxies from the 2MASS Large Galaxy Atlas. ... for the Study of Gas and Dust in Galaxies . ... 15:00- 15:30 Leslie Hunt - Bulges and disks in spiral galaxies: clues for secular evolution? ... 09:00- 09:30 Edvige Corbelli - Dust and gas as tracers of star formation in M33 . ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Star Atlas . ... stars . ... Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do neutron stars generate steady magnetic fields? ... How can a neutron star exist if those neutrons are just going to pieces? Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... user-defined data file formats . ... better integration with a user's analysis routines To add such functionality to SAOimage, we developed the XPA Messaging System that allows X programs to define points of public access through which data and commands can be exchanged with external programs. ... We have utilized XPA to develop "SAOimage: The Next Generation" (SAOtng), an extensible image display service that can cooperate with other processes and programs. ... SAOtng help pages . ...

... ROTATION CURVE: When studying spiral galaxies it is invariably found that the stellar rotational velocity in the disk remains constant, or "flat", with increasing distance away from the galactic center. ... By the same argument the flat galactic rotation curves seem to suggest that each galaxy is surrounded by significant amounts of dark matter. ... What is the maximum rotation velocity and the total amount of mass (including dark matter) in the galaxy as a function of radius. ...

. Album : asv-album :: Travels to distant places and countries :: 1998/05 Boston (USA) :: 1 Boston streets . Up . << Prev . Along the Quincy Market building, small restaurants are numerous . Next >> . Photo album generated by album tool a script written by D. Madison on Tue Jun 23 14:46:37 2015 .

... Stars with tens of times the mass of the Sun profoundly affect their galactic environment. ... Orion Nebula: The 2MASS View . ... SOHOs Twin Sungrazers . ... This four frame animation (courtesy D. Biesecker) shows two comets arcing toward a fatal fiery encounter with the Sun. ... NGC 6070: First Light for Sloan . ... A Mars Glint . ... Neutrinos in the Sun . ... Comet SOHO and Nebulae in Orion . ... On this date, comet SOHO was moving against the background of the nebula-rich constellation of Orion....

... title='Алкотестер Inspector AT100' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> . Цвет: белый . Коллекция: Осень-зима 2015/2016 . ... Размер FR: 59 . ... Лонгслив Z Generation. ... Сезон: Осень-зима 2015/2016. ... Модель полностью изготовлена из EVA (вспененного полимера), надежного и легкого материала. ... Коллекция: Весна-лето 2016 . ... Материал подошвы: искусственный материал . ... Размеры: длина 37 см высота 25 см ширина 16 см Цвет: коричневый . ...

Next: HST Paper Products: A New Way to Look at HST Data . ... After providing on-the-fly re-calibration of HST data to archive users, ST-ECF has embarked on a new project aiming at grouping, cosmic ray cleaning and drizzling images taken by most HST instruments. ... The production of the missing jitter files combined with the extraction of additional engineering parameters will greatly enhance the homogeneity and the scientific value of the entire archive. ... 1995, HST Data Handbook, STScI, 107 . ...

Next: Flagging, Manipulating and Examining Up: Generating Dummy Visibility Data Previous: Making a Fake Observation . If you just want to generate visibilities corresponding to a particular model image, and do not care whether they follow realistic tracks in the uv plane, then im2uv may suit you. Task im2uv simply Fourier transforms an image (whose units should be Jy/pixel) and writes this transform into a visibility dataset. ... IM2UV . ... Normal visibility selection. Only visibilities . ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Next generation Fornax Cluster surveys . ... Data Handling and Products . ... Science Data Products Forum . ... An international team, with Dr. Hilker as Co-PI, has started to gather wide-field optical and infrared imaging data as well as spectroscopic data on the whole extent of the Fornax cluster, mainly based on observations with ESO telescopes (VLT, VST, VISTA). ...

... Here is a sample parameter file that is set to plot the B filter trace data. ... One can generally get by with the default graph parameters. input = B.a list of images or list files to be graphed (wx1 = 3000.) left world x-coord if not autoscaling ... autoscaling (wy2 = 100.) upper world y-coord if not autoscaling (wcs = logical ) Coordinate system for images (axis = 1) axis along which projection is to be taken (transpose = no) transpose the x and y axes of the plot (pointmode = no) ...

... The Russian Federation State Program "Physics of Condenced Matter", the "Superconductivity" division , Project code "Generation-2" . ... The multielement josephson structures are known to allow implementation of the unique properties of the Josephson junctions as electromagnetic waves sources with high change rate of generation frequency, working in the millimeter and submillimeter wavelength diapasones. ... Even the optimal type of the junction electrodynamic interconnection isn't chosen. ...

... Energetic magnetospheric ions are often unstable to the electromagnetic ion cyclotron (EMIC) instability . ... generation of EMIC waves below the proton gyrofrequency , and . ... Depending on the local proton gyrofrequency, the frequency of the EMIC waves varies: in the magnetosphere we deal with the ULF range (more precisely 0.1-5 Hz), while in the auroral field lines we have ELF waves (tens or hundreds of Hz; see radio frequencies and flickering aurora ). ... Space Physics Text Book of Oulu ...

... Search . Email & phone search . ... Astrophysics Group . ... Galaxy Formation and Evolution . Highlights & News . ... Main Projects . ... PhD Thesis Projects . ... 2013, Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE . ...

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