... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

... Takuya Akahori "Faraday Rotation Measure due to the Intergalactic Magnetic Field" . Shae Brown "Cross-correlation of ATLAS and Spitzer-SWIRE Surveys: Probing intergalactic magnetic fields" . Roger Clay "Using low energy cosmic rays to investigate local galactic magnetic fields" . Roland Crocker "A new lower limit on the magnetic field around the Galactic Centre" . ... JinLin Han "Rotation measures of pulsars and radio sources for Galactic magnetic fields" . ...

... 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. ...

... Measurements of magnetic fields on scales larger than galaxy clusters are needed to distinguish between fields generated in the primordial Universe and those generated at later epochs, with implications for particle physics, cosmology, and astrophysics. ... In this talk I will review mechanisms for generating magnetic fields across cosmic time, implications for post-recombination physics, and current observational constraints on intergalactic magnetic fields. ...

... Spiral Galaxy M66 . ... Big beautiful spiral galaxy M66 lies a mere 35 million light-years away. About 100 thousand light-years across, the gorgeous island universe is well known to astronomers as a member of the Leo Triplet of galaxies. NGC 7023: The Iris Nebula . ... Did you know that our Milky Way Galaxy has huge bubbles emitting gamma rays from the direction of the galactic center? ... 700 Kilometers Below Comet Hartley 2 . ... What kind of comet is this? ... Comet Hartley 2 Flyby . ...

... Contacts . 2012: . ... We refined the fundamental parameters of the components, the orbital periods, and the conditions of photospheric heating of the secondary component by the ultraviolet radiation of the hot component. ... The observations of the star clusters associated with ultra-luminous x-ray sources (ULXs) in four galaxies on the 6-meter and VLT telescopes have shown that all the ULXs are located within 200pc of very young star clusters (younger than 5 million years). ... Archive . ...

... 633Slee+ Fifty-eight fields near rich clusters of galaxies were surveyed with the Very Large Array using scaled arrays in the B/C and/or C/D configurations at 1.5 GHz and 4.9 GHz. The fields were centered on steep spectrum sources in or near clusters that were earlier surveyed with lower resolution telescopes. ... The columns are : . Column 1 Cluster Field (Z1518 = Zw1518.8+0747) . Column 2 distance of source from cluster centre in Abell radii . ... Column 5 1.5 GHz flux (mJy) . ...

... 2002 January 16 . Abell 2597's Cosmic Cavities . ... Explanation: Typical of large galaxy clusters billions of light-years away, Abell 2597 features hundreds of galaxies embedded in a cloud of multimillion degree gas which glows in x-rays. This Chandra Observatory x-ray image shows the hot gas in this cluster's central regions and also reveals two large dark cavities within the x-ray glow; one below and right of center, the other above and left. ... About APOD | ...

Aitoff Projection showing ChaMP Fields . ... Main survey: >20 from galactic plane. ... Galactic Plane Survey: No subarray fields: reduced area and more complicated processing . ... Short exposures included except NGC galaxies . Galactic Plane Survey: > 30 ksecs . ... Galactic Plane Survey: >10% contamination by a diffuse/distributed X-ray or optical source. ... E(B-V)= (B-V) - (B-V) 0 which translates to visual extinction A V via . ... Crudely, E(B-V) can be related to Galactic latitude via . ...

Origin & Evolution of Magnetic Fields Ellen Zweibel zweibel@astro.wisc.edu Depar tments of Astronomy & Physics University of Wisconsin, Madison and Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas Origin & EvolutionofMagnetic Fields ­ p.1/17 Importance of the Problem A cosmological problem. ... Interplay with ISM studies Structure of galactic fields on large & small scales? How do fields affect turbulence? ... Origin & EvolutionofMagnetic Fields ­ p.7/17 We Also Know.. ...

... Cosmic rays are extremely high-energy particles from far beyond our Solar System. They provide us with important samples of material from outer space. ... But now, using the remains of a star that died a thousand years ago, astronomers have found clues as to where exactly cosmic rays form. ... A glowing, expanding ring of material is all that is left. ... Astronomers believe they could go on to grow into cosmic rays by colliding with the material of the ring. ...

. Go Here for Hubble Ultra Deep Field . ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

... STScI-PF95-14 FOR RELEASE: APRIL 5, 1995 HUBBLE VIEWS DISTANT GALAXIES THROUGH A COSMIC LENS This NASA Hubble Space Telescope image of the rich galaxy cluster, Abell 2218, is a spectacular example of gravitational lensing. The arc-like pattern spread across the picture like a spider web is an illusion caused by the gravitational field of the cluster. ... The arcs are the distorted images of a very distant galaxy population extending 5-10 times farther than the lensing cluster. ...

... Dynamical and chemical effects of FR II radio sources on the intra-cluster medium, Huarte-Espinosa, M., Krause, M., Alexander, P., Kaiser C. R., 2008, submitted to the MNRAS. ... Simple scaling laws for astrophysical jets, Huarte-Espinosa, M., Mendoza, S., 2006. ... Conference Pro ceedings 3. ... Hydrodynamic scaling laws on Astrophysical Jets Huarte-Espinosa, M., Mendoza, S., 2005, RevMexAA Conference Series on Triggering Relativistic Jets, Cozumel, Mexico, March 28 - April 1 2005. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . Milky Way . Stars . ... Other Galaxies . ... Barred spiral galaxy NGC 6744 is located in a constellation of the southern hemisphereтАЩs sky, called Pavo (Latin for peacock). At a distance from our Solar System of about 30 million light years, NGC 6744 is not only one of the closest spiral galaxies but is thought to be one of the visible galaxies most like our own Milky Way. Is it our cosmic doppelganger? ...

... V.V.Makarov, V.P.Reshetnikov, V.A.Yakovleva . Photometric study of the peculiar galaxy NGC 2685" . ... eds.), Tallinn, 1989, p.19 . ... Press, 1994, p.272-273 . ... A.A.Mullari, V.V.Orlov, St.Petersburg Univ. ... conference, St.Petersburg, 1997, p.168-169 . ... All-Russian Astronomical Conference, Book of Abstracts, . ... in "Astronomy: traditions, present, future", V.V.Orlov, V.P.Reshetnikov, N.Ya.Sotnikova (eds.), St.Petersburg University Press, 2007, p.92-115 (in Russian) . ...

... Shustov B.M., Wiebe D.S. Dust expelling from the Galaxy ( abstract from the journal ). Astronomy Reports , 1995, 39 , 578-586 [AZh, 72 , 650-659]. Wiebe D.S., Shematovich V.I., Shustov B.M. Chemical and dynamical evolution of protostellar clouds: initial stages of collapse ( abstract from the journal ). ... Shustov B.M., Wiebe D.S., Tutukov A.V. Evolution of disk galaxies and loss of heavy elements into the intracluster medium. ... ApJ (Letters), 1998, 503 , L71-L74 ( astro-ph/9806155 ). ...

... Karachentsev I.D., Dolphin A., Tully R.B., Sharina M., Makarova L., Makarov D. , Karachentseva V., Sakai S., Shaya E.J. Advanced Camera for Surveys Imaging of 25 Galaxies in Nearby Groups and in the Field . ... Karachentseva V.E., Melnyk O.V., Vavilova I.B., Makarov D.I. Virial and total masses of galaxy triplets in the Local Supercluster . 2005, Astron. ... Karachentsev I.D., Makarov D.I. "The Galaxy Motion Relative to Nearby Galaxies and the Local Velocity Field" . ...

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

Title: A Dark-Matter Spike at the Galactic Center? Authors: Piero Ullio , HongSheng Zhao , Marc Kamionkowski . ... Title: The Galaxy Environment of Quasars in the Clowes-Campusano Large Quasar Group at z~1.3 . ... Title: The Galaxy Environment of a Quasar at z=1.226: A Possible Cluster Merger . ... 16 matches for the search pattern galaxy environment . The URL for this page is: http://xxx.itep.ru/find/astro-ph/1/galaxy+environment/0/1/0/past,all/0/0 www-admin@xxx.lanl.gov ...