... Hydrogen in M51 . ... Explanation: Perhaps the original spiral nebula, M51 is a large galaxy, over 60,000 light-years across, with a readily apparent spiral structure . Also cataloged as NGC 5194, M51 is a part of a well-known interacting galaxy pair, its spiral arms and dust lanes clearly sweeping in front of companion galaxy NGC 5195 (top). ... Reddish hydrogen emission regions, called HII regions , are the regions of intense star formation seen to lie mainly along M51's bright spiral arms. ...

Еще в разделе: (Показать все результаты (>161926) - www.astronet.ru/ )

• Star Forming Region Hubble X
• Giant Emission Nebula NGC 3603 in Infrared
• Emission Nebula IC 1396

... Many of these radi HII regions lie beyond the range of optical detection, at distances exceeding several kpc; they thus provide a comprehensive coverage of the southern HII regions in the Galaxy over the longitude range 210 to 360^o and consistute a vital data base for the study of galactic structure. ... C Caswell (1972) . ... In column 16, "V", or a specific nebula name, denotes the presence of a visible optical counterpart, and "A" indicates the absence of an optical counterpart. ...

Еще в разделе: (Показать все результаты (>1636) - www.sao.ru/ )

• Radio survey for new compact HII regions
• The use of IRAS data to define H II regions
• Catalogue HII regions

... Australia Telescope Compact Array Radio Imaging of the Proplyd-like Objects in the Giant HII Region NGC 3603'' . M?cke, A., Koribalski, B.S. , Moffat, A.F.J., Corcoran, M.F., Stevens, I.R. 2002, ApJ 571, 366 . ... Brenneman, L., Corcoran, M.F., Moffat, A.F.J., Marchenko, S.V., Ptak, A., Skalkowski, G., Mushotzky, R., Stevens, I.R., Mueke, A., Koribalski, B.S. , et al. ... Physical Properties of visual counterparts to X-ray sources in the giant HII region NGC 3603'' . ...

Еще в разделе: (Показать все результаты (>10090) - www.atnf.csiro.au/ )

• The Nuclear Region: HI Absorption Measurements
• ATNF Colloquium
• casacore: images/Regions/WCConcatenation.h Source File

Most current theories for magnetospheric emission can be grouped into polar cap, outer gap, and nebular models. These models, at least in some cases, need not be mutually exclusive; the Crab pulsar (among others), for example, shows clear evidence for pulsed emission from the magnetosphere and unpulsed emission from the surrounding nebula. ... This suggestion is strengthened by observation of a distinct soft emission component, consistent with the cooling scenario, from several of these pulsars. ...

Еще в разделе: (Показать все результаты (>2918) - hea-www.harvard.edu/ )

• Combining Region and Table Filters
• Region Algebra
• *imcnts* - Find counts in an extended region, after removing an embedded point

Define region . ... Area/perimeter . Define a region of interest on a graph or graphs. Select the region, there are 5. ... Inside polygon . Points inside a closed, non-intersecting polygon are considered inside the region. ... In the polygonal region type, define the region by successive clicks with the left mouse button, use the right mouse button to register the polygon. ... Select the region to use. ... Click on Area or Perimeter and use the mouse to define the region. ...

Еще в разделе: (Показать все результаты (>400) - xray.sai.msu.ru/ )

... 2010 June 11 . Hydrogen in M51 . ... Explanation: Perhaps the original spiral nebula, M51 is a large galaxy, over 60,000 light-years across, with a readily apparent spiral structure . Also cataloged as NGC 5194, M51 is a part of a well-known interacting galaxy pair, its spiral arms and dust lanes clearly sweeping in front of companion galaxy NGC 5195 (top). ... The data include long exposures through a narrow hydrogen alpha filter that trace emission from atomic hydrogen. ... About APOD | ...

Еще в разделе: (Показать все результаты (>8294) - www.sai.msu.su/ )

• APOD: 2001 February 16 - Star Forming Region Hubble X
• APOD: 2002 August 14 - Giant Emission Nebula NGC 3603 in Infrared
• APOD: 2004 August 5 - Emission Nebula IC 1396

... STScI-PRC98-11A STARING INTO THE WINDS OF DESTRUCTION: HST/NICMOS IMAGES OF THE PLANETARY NEBULA NGC 7027 The Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer (NICMOS) has captured a glimpse of a brief stage in the burnout of NGC 7027, a medium-mass star like our sun. ... The material settles into a wind of gas and dust blowing away from the dying star. ... During this phase, intense ultraviolet radiation from the central star lights up a region of gas surrounding it. ...

Еще в разделе: (Показать все результаты (>9218) - www.arcetri.astro.it/ )

• APOD: June 25, 1996 - A Star Forming Region in the LMC
• The BD+40 region (Abstract)
• A collection of images

We present a study of the dust properties of 12 classical and superbubble H II regions in the Large Magellanic Cloud. ... Our infrared observations show surprisingly little correlation between the emission properties of the dust and the effective temperatures or bolometric magnitudes of stars in the H II regions, suggesting that the H II region evolutionary timescale is not on the order of the dust processing timescale. ... ADS Citation Query . ... citations vs. year [year,citations] . ...

Еще в разделе: (Показать все результаты (>12421) - www.stsci.edu/ )

• Molecular hydrogen emission in the interstellar medium of the Large Magellanic
• Dusty HII Regions and Planetary Nebulae
• Dr Andrea Banzatti | STScI

I-GALFA View of a Galactic Tangent Region . ... Image featured in NAIC Newsletter #46 . I-GALFA image of hydrogen gas in a tangent region outside the Sagittarius arm. ... Because we are viewing this gas in a direction closely aligned with (tangent to) its orbital motion, it appears to be moving away from us (we are orbiting the Galactic center with a similar speed, but our own motion in a different direction). ... The gas near 60 degrees longitude is being viewed tangent to its orbital motion. ...

Еще в разделе: (Показать все результаты (>3155) - www.naic.edu/ )

• The Tarantula Nebula
• Colloquium Schedule

... Tadpole Emission Nebula and the Flaming Star Nebula . The constellation of Auriga harbors the cluster NGC 1893 which contains the Tadpole Nebula (IC 410). ... The Flaming Star Nebula, IC 405, is the magenta/purplish area and is the reflection portion of this nebulous region. 5nm Narrowband filters; H-alpha: O-III: S-II - 60: 60: 40 minutes x 600-second sub frames, Total= 2-hours 40-minutes, binned 1x1. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>380) - www.atmob.org/ )

... region (region-7.9.3) [xmmsas_20080701_1801-8.0.0] . ... Local-background regions are in all cases annuli. ... Background regions of this shape should be chosen when there is no extended emission in the FOV, because OA-concentric regions are in general larger than source-concentric ones (thus offer better statisitics), yet sample everywhere approximately the same background level, because the value of the vignetting function is approximately the same at a given radius from the OA. fovbkgannulus =`no...

Еще в разделе: (Показать все результаты (>5141) - xmm.vilspa.esa.es/ )

• The contour method of calculating source region shape

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... The Danish 1.54-metre telescope located at ESOтАЩs La Silla Observatory in Chile has captured a striking image of NGC 6559, an object that showcases the anarchy that reigns when stars form inside an interstellar cloud. ... NGC 6559 . ...

Еще в разделе: (Показать все результаты (>18355) - www.eso.org/ )

• Synthetic Star Forming Region HRDs
• Panning across the region of the star cluster NGC 6604 | ESO
• Panning across the R Coronae Australis region | ESO

This image of NGC 4151 shows a close-up of the central region of the galaxy in an inset. The dimensions of the inset are only 2,000 light-years across. Here, the Chandra X-ray data from the larger image are shown in blue, and we add in radio data from the VLA (purple) and HST data (yellow) showing oxygen emission. ... X-ray: NASA/CXC/CfA/J.Wang, et al.; Optical: Isaac Newton Group of Telescopes, La Palma/Jacobus Kapteyn Telescope; Radio: NSF/NRAO/VLA ...

Еще в разделе: (Показать все результаты (>6510) - www.astronomy.com/ )

• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7495864D-E2AF-4684-B198-10E042E4ECE7%7D
• Is emission nebula NGC 6334 a mini starburst region? | Astronomy.com
• An anarchic region of star formation captured | Astronomy.com

... We report on our ongoing project ``Infrared Study of HII Regions Associated with Small Clouds.' ... These IR data, combined with optical imaging (which will be obtained from the IAC-80 telescope), IRAS survey maps, and existing CO observations of the associated clouds, will allow us to undertake a detailed investigation of the gas-to-dust mass ratio, initial mass function and the star-formation efficiency in these complexes. ... CHECKPSF: check the PSF (Point Spread Function) model, . ...

Еще в разделе: (Показать все результаты (>1410) - www.adass.org/ )

• An IRAF-Independent Interface for Spatial-Region Descriptors
• IDL-based Database of Solar Active Regions
• Classification of Objects in the Guide Star Catalog

... Radiance image in Si iv 1402.8 (top-left, in reversed color table), Doppler velocity image (bottom-left), nonthermal velocity image (bottom-right) and HMI magnetogram (top-right) of region "A". ... The yellow box on the Doppler image outlines the region where anti-parallel flows are seen. ... A cluster of such loops was observed on the solar disk in active region NOAA11934, in the Si iv 1402.8 spectral raster and 1400 slit-jaw (SJ) images. ...

Еще в разделе: (Показать все результаты (>2456) - star.arm.ac.uk/ )

• Solar Active Region 10999 by Deirdre Kelleghan | International Year of
• SCL Sfit Commands
• Index of /~zhu/bp_mag/region_no_xray_response

... Magnetospheric boundary layer is a region close to the magnetopause in which magnetosheath plasma has strong influence. ... A new boundary called the free-flow boundary has been suggested to exists between the exterior cusp and the magnetosheath (this is the boundary that is often plotted as a dashed line in schematic figures of the magnetosphere). Boundary layer is a very special region, not only because of the presence of magnetosheath plasma, but also because of the still uncertain topology. ...

Еще в разделе: (Показать все результаты (>653) - www.iki.rssi.ru/ )

• The Earth's Magnetosphere
• Magnetosheath [Oulu]
• Remote Sensing of Tropical Regions

Large-scale activity in solar eruptive events of October-November 2003 by SOHO/EIT data . ... We analyze large-scale disturbances associated with extremely powerful flares and coronal mass ejections (CMEs) occurred during two passages across the solar disk of a grandiose complex of three active regions in October–November 2003 using SOHO/EIT imaging data. ... In events repeating with short time intervals, the main dimmings observed show clear homology by their form and location. ...

Еще в разделе: (Показать все результаты (>390) - www.izmiran.rssi.ru/ )

• CMEs and Space Weather
• Chains and CMEs
• LARGE-SCALE PHENOMENA AT THE SUN ASSOCIATED

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . Sun . ... March . ... The extent of the solar eclipse of 3 November€а 2013 at 13:22 UTC as seen from Accra, Ghana. We will see a similar sight.€а (Image credit: Kwabena under Creative Commons Licence) . ... Your viewing location is not important as long as it offers an unobstructed view of the south eastern sky.. ... You can use ?eclipse glasses? to view the Sun, these are made from aluminized Mylar filter material. ...

Еще в разделе: (Показать все результаты (>2353) - www.armaghplanet.com/ )

The Earth's magnetosphere global structure is conditioned by the interaction of the Solar wind and Earth's magnetic field. ... Many various magnetospheric models are available in the NSSDC . ... Fairfield D. H., Average and unusual location of the Earth's magnetopause and bow shock, J. Geophys. ... Stasiewicz K., Polar Cusp Topology and Position as a Function of Interplanetary Magnetic Field and Magnetic Activity: Comparison of a Model with Viking and other Observations, J. Geophys. ...

Еще в разделе: (Показать все результаты (>1188) - www.cosmos.ru/ )

• The Earth's Magnetosphere
• The simulative geophysical regions cross-sections coordinates
• Designation

... Sea Surface Temperature, restored from NOAA satellite data . You may use Java applet to view temperature maps in more detail. Using the applet, you can build "accumulated" temperature maps from selected data, get temperature values in any point and save the resulting image to your local disk. Date and time of the data . ... 14:25 (GMT) . 3.04.2016 . ... For information send a mail to: info@sputnik.infospace.ru . ...

Еще в разделе: (Показать все результаты (>19) - sputnik.infospace.ru/ )

• SPUTNIK, SST Adriatic Sea
• SPUTNIK, SST Baltic Sea
• SPUTNIK, SST Barents Sea