... Research . ... I aim to understand the variety of processes that have driven galaxy formation and mass assembly across cosmological history via the resolved (star-by-star) study of nearby systems - in particular the Milky Way and Andromeda (especially their stellar halos and globular cluster populations), the Magellanic Clouds, and the myriad of smaller dwarfs that inhabit the "Local Group".б  . ... Globular clusters are fascinating objects in their own right. ...

Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

Jason Kalirai . Research Interests . ... The "SPLASH" Survey - M31's Stellar Halo . ... The "SPLASH" Survey - M31's Dwarf Satellites . ... Open Star Clusters and Stellar Evolution . ... Globular Star Clusters and the Age of the Galactic Halo . ... As these clusters are among the first objects to have formed in the Galactic halo, all stars above 0.8 Msun have now evolved off the main-sequence and formed (mostly) low mass white dwarfs (stellar remnants with no fuel). ...

... Staff . ... Galaxies, AGN, Cosmology . ... A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope . ... In this framework, an international collaboration between INAF-OAA, INAF-Brera, INAF-OATs, the University for Science and Technology of China-Hefei, the University of Ferrara, and the University of Massachusetts-Amherst, is undertaking a new cluster survey using an X-ray facility that was never exploited before for this goal: the X-ray Telescope (XRT) onboard the Swift satellite...

Since 1991 I have mainly worked on Nearby Supernovae, carrying out optical spectroscopy and photometry. ... Supernovae . ... A list of all my publications can be found here , while refereed papers can be seen here . ... A review on The Age of Wonder (published on Science, People and Politics) . ... In this way, we know how to react to the inevitable discrepancies that are found when we compare the results of our calculations with measurements of the real things. ... Back To Nando Patat Home Page ...

... 2014 July 15 . A Blue Bridge of Stars between Cluster Galaxies . Image Credit: NASA , ESA , G. Tremblay ( ESO ) et al. ... Explanation: Why is there a blue bridge of stars across the center of this galaxy cluster? ... More unusual, however, is a squiggly blue filament near the two large elliptical galaxies at the cluster center. ... The knots in the bridge are condensation regions that glow blue from the light of massive young stars. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... Current Work ­ Attempting to understand AGN feedback in galaxy clusters AMI ­ Where does AMI fit in? ... Feedback needed to offset cooling and explain the deficit of cold, molecular gas in cluster cores. ... Some already observed with AMI ­ Ideally want to observe many more (~100 ­ 150) cooling clusters in this energetically important but often overlooked frequency range. ... If bright at 1.4GHz then observe with AMI Campaign to observe many clusters at higher frequency with GISMO (2mm). ...

Maidanak Laboratory is a part of Sternberg Astronomical Institute of Moscow State University. ... Observations are conducted with 1.5 meter RC telescope AZT-22 of Maidanak Observatory (Uzbekistan). rus . ... maidanak lab home page . ... at Sternberg Astronomical Institute . ... 2000). ... Because of technical reasons, we had to use three different CCD cameras in our observations, Pictor-416 camera in 1995, Pictor-416 and TI 800 x 800 cameras in 1997 and 1998, and ST-7 camera in 1999 and 2000. ...

Next: J.E. Chambers, Research Astronomer Up: Research Previous: Research Contents . ... Solar Variability and Climate . Other Activities . ... Applied to data of flares on Gliese866 he was able to estimate the area of hydrogen emitting flare regions as 1-13% of the stellar surface. ... As partners in the project, Armagh Observatory has been asked to contribute to the selection process in exchange for priority access to the data which will eventually flow from the satellite. ...

... Observatory . ... The Laboratory of Astrometry . Dept. for Physics of Stars&Galaxies . ... Astronomical Calendar . ... UkrVO . ... The purpose of research: Creating a stellar catalog to study the structure and kinematics of star systems, including open star clusters and stars with large proper motions; the enhancement ICRF / Hipparcos system to stars dawn to 17 m (V); Search of binary systems of brown dwarfs and determination of their parameters; astrometry of minor bodies of the Solar System. ...

... Archives . ... my first AAS. ... I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. ... classification vs. clustering or supervised learning vs. unsupervised learning : the former terms from the pairs indicate the fact that the scientist already knows types of objects in his hands. ... Tags: Classification , clustering , cosmology , spatial statistics , supervised learning , test , unsupervised learning . ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Parkes | ... I work mainly as a radio astronomer, using powerful telescopes such as the Australia Telescope Compact Array, the Very Large Array, the Greenbank Telescope, and the Westerbork Synthesis Radio Telescope array. ... E-Mail: shea.brown@csiro.au . ...

ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

... Data Analysis SAS News What is SAS? ... Calibration & Background Calibration Background Analysis . SOC Info XMM-Newton Contact Details How to get to ESAC ESA Research Fellowships ESAC Trainee Projects ESA Young Graduate Trainees . ... Other Links Project Related Links Research Projects Other X-ray Missions Space Weather Links . The Science Operations and Data Systems Division of ESA's Research and Scientific Support Department develops and runs astronomy projects in space. ...

... 1) A new bright galaxy of the Local Group VV124 (UGC4879) is found. ... Kopylov A.I., Tikhonov N.A., Fabrika S.N., Drozdovsky I.O., Valeev A.F., MNRAS Lett, V. 387, Issue 1, L45, 2008. ... For systems of galaxies in the regions of the Hercules and Leo superclusters the dwarf-to-giant ratio of galaxies in the r-band is evaluated, and it is found that this ratio increases with increasing X-ray luminosity at log L X > 43.5 erg/s. Kopylova F.G., Kopylov A.I., Ast. ... Kopylova F.G., Kopylov A.I., Ast. ...

. F IGURE . 13. The (a) metallicity and (b) age distributions of the globular clusters of Galactic origin. Different shadings are used to show the thick-disk and old-halo clusters. The curves are Gaussian fits to the corresponding histograms. discussion in the text | privious figure | next figure .

Main Program Travel Where to go in Moscow Information . ... The 2014 year marks the 100th anniversary of Yakov Zeldovich . ... John Carlstrom (University of Chicago) . ... Lyman Page (Princeton University) . ... The conference will be held at the Space Research Institute (IKI) in Moscow, Russia, on June 16-20, 2014 . ... International Conference: Cosmology and High Energy Astrophysics (Zeldovich-90) 20-24 Dec 2004, Moscow, Russia . ... 2014 Space Research Institute, Moscow Русская версия ...

... Educational programs (English) . ... Pre-university education . ... Research areas . ... Samara region . SSAU History . ... Scientific Publications . ... Samara State Aerospace University and Schneider Electric signed a memorandum of cooperation. Document was signed by Evgeniy Shakhmatov, SSAU Rector and Joachim Dahms, Senior Vice President in management of Schneider Electric Energetics market, Chairman of the Board of Directors of PC Electroshield - TM Samara . ... Schneider Electric . ...

... The Hubble Space Telescope is jointly run as a partnership between the European Space Agency and NASA. ... For more information on the European contribution to the Hubble Space Telescope go to: http://hubble.esa.int and for more on the VLT go to: http://www.eso.org . ... A Taste of Real Astronomy ? The ESA/ESO Astronomy Exercises . ... The "ESA/ESO Astronomy Exercise Series" has just been published, on the web and in print. ... The language for the ESA/ESO Astronomy Exercise Series is English. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Image credit:ESO/J.Emerson/VISTA. ... However others are less pessimistic and it has even been claimed that the mysterious ?Wow! signal? received in 1977 originated from the direction M55.б  Sadly, this still unexplained pulse of radio energy originated from a location rather to the northwest of M55 so I doubt if the source was this cluster (if indeed the signal was genuinely of extraterrestrial origin). ... Mysterious Wow! ...