... TOPOLOGICAL AND METRIC SPACES TOPOLOGY-1, SPRING 2012 Г. of a Hausdor space is closed; (c) the image of a compact space under a continuous map is compact. Problem 2. Let A Rn be a closed subset, let C Rn be a compact subset. ... A subset K R is compact if and only if it is bounded and closed. ... Prove that (a) the image of a connected space under a continuous map is connected; (b) the same, for path connectedness; (c) an open subset in Rn is connected if and only if it is path connected. ...

... Compact Binaries . ... Unlike the Sun, most stars in our Galaxy orbit another star: these systems are called binary stars. Generally it takes many years for the two stars to orbit around each other. ... These binaries are interesting for many reasons. One is that they are predicted to emit lots of gravitational waves. ... Over time as gravitational waves are emitted, the time taken for the two stars to orbit one another changes by a small but measurable amount. ...

Time has come for me to move to a new longitude, but not before following the tradition and updating you on the work I have been doing in the latest stages of my PhD (and beyond). ... This presentation would of course not be complete without a final attempt at convincing you of the potential of some excitingly new technology to publish multi-dimensional datasets in 3-D. Hence, I shall also tell you about the newly developed X3D pathway Chris Owen and I have been developing lately. ...

... We report the results of a millimeter interferometric survey of compact 3 mm continuum sources in the inner 5.5'x5.5' region of the Serpens core. We detect 32 discrete sources above 4.0 mJy/beam, 21 of which are new detections at millimeter wavelengths. ... The mass spectrum of the clumps, dN/dM~M^(-2.1), is consistent with the stellar initial mass function, supporting the idea that the stellar masses in young clusters are determined by the fragmentation of turbulent cloud cores. ...

... Meta Index / Home Page / Description / Data Subspace Expression Parser . The data subspace in some cases will produce more compact subspace specifications than in others. ... There is also a special subtlety with regards to the grouping of region function filters. ... it tries to combine these into one filter with two regions. ... The following expression is equivalent to the first one in this section, but will result in the creation of two subspace filters, instead of one. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . des actualit†йs . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Fusion de galaxies naines †а proximit†й de la Voie lact†йe . ... 07/04/2016 - Plong†йe au centre de la Voie lact†йe . ... 25/02/2016 - La Voie lact†йe cartographi†йe en ondes millim†йtriques . ...

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! ...

. Cosmology . Very Early Universe . Cosmic Microwave Background Anisotropy . Dark Matter Models . Large Scale Structure . High Energy Astrophysics . Active Galactic Nuclei . Astrophysics of Compact Objects . Accretion Disks . Scientific Staff:

. 20. Buhagiar D. Compactness and extension theory in bitopological spaces. A new definition of compactness is given for bitopological spaces in the sense of Kelly, namely infcompactness. For general bitopological spaces, the study of compactness in such spaces is initiated together with some elements of extension theory.

High-E phenomena from GRBs EM and non-EM observatories Ralph A.M.J. Wijers Astronomical Institute `Anton Pannekoek' Zeldovich 90, Moscow , 19 Decemb er 2004 ­ p. 1/16 Introduction Basic properties of GRBs High-E neutrinos and cosmic rays from afterglow Engine and lower-E neutrinos Extreme radio supernovae Zeldovich 90, Moscow , 19 Decemb er 2004 ­ p. 2/16 GRB Basics z 1, d 1028 cm E 1052 ... Zeldovich 90, Moscow, 19 Decemb er 2004 ­ p. 5/16 There Are Baryons! ...

... One striking feature is a small source of almost pure H 2 line emission, which is located near one of the compact sources in Orion reported by O'Dell and collaborators (HST-18 = 203-504). ... H-H objects, Proplyds, Orion Bar, H 2 . ... We obtained a series of images across the bright rim of the Orion Bar near the peaks of mm-wave molecular line emission with NICMOS cameras 1-3 (NIC1, NIC2, NIC3) in several filters on 1998 February 18. ... The suggestion of an H-H object does not seem compelling. ...

... Content Model: Optional list header (LH), followed by one or more terms (DT) and definitions (DD). A definition list is a list of terms and corresponding definitions. Definition lists are typically formatted with the term on the left with the definition following on the right or on the next line. ... The definition list element can take the COMPACT attribute, which suggests that a compact rendering be used, and is appropriate if the list elements are small and/or the entire list is large. ...

ECal R D in N. America - Test Beam Readiness/Plans · Silicon-tungsten SLAC, Oregon, Brookhaven (SOB) · Scintillator tiles ­ tungsten U. Colorado, Fermilab · Hybrid silicon/ scintillator ­ tungsten U. Kansas Durham TB R. Frey 1 Si-W Concept ­ SiD version 30 or fewer long. samples Durham TB R. Frey 2 · Features Compact (1 mm gaps) High segmentation with little penalty Passive cooling ... Expect ­ at least for front half of ECal ­ to be able to optimize the design independent of test beam. ...

... The circumnuclear GASEOUS disks are often decoupled from the circumnuclear stellar disks and are even stronger inclined to the outer disk planes; in fact, we have found a considerable `population' of inner polar rings. Inner gas polar rings are found as in spiral galaxies with the massive outer gas disks co-planar to the main symmetry planes (e.g. NGC 2841, Sil'chenko et al. 1997, and NGC 7217, Sil'chenko & Afanasiev 2000) as well in many lenticular galaxies (Fig. ...

... The formation of multiple images of a distant quasar by the gravitational lensing effect of a foreground galaxy may be very simply, and faithfully, accounted for by a wine glass experiment. Figure 1. In the wine glass experiment, a bright compact light source (at the top of the photo) serves as a distant quasar. The wine glass on the table distorts the light rays from the "quasar" and produces a caustic having with a triangular shape (see enlargement in Figure 3 ). ...

Blackholes Forum Message . Forums: . ... Infinite Indeed . ... Posted by Joe Antognini on January 9, 2005 08:07:14 UTC . ... So how can we calculate the mass of the BH? - bazukaz - January 25, 2005 - 14:00 UTC . Gravity is the weakest force of all - secretary - January 25, 2005 - 18:53 UTC . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... astro-ph . ... Statistical Characterization of the Chandra Source Catalog . ... The first release of the Chandra Source Catalog (CSC) contains ~95,000 X-ray sources in a total area of ~0.75% of the entire sky, using data from ~3,900 separate ACIS observations of a multitude of different types of X-ray sources. ... In addition to these traditional catalog elements, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively. ...

... The VSOP Survey Continuum Source List . The radio sample for the VSOP continuum survey was defined to include all extragalactic radio sources with: . a total flux density at 5 GHz, S>=1.0 Jy . ... The sample also included all sources in the sky with a 5 GHz flux density S>5 Jy, regardless of spectral index and galactic latitude. ... The source would then be included in the VSOP sample (three of the sources were found with a flux density above 1 Jy and added to the sample). ...

... The three-frequency radio survey of the Galactic plane has been made at 0.96, 3.9 and 11.2 GHz with the RATAN-600 radio telescope in three sets in 1991-1995 (Trushkin 1996b). ... The preliminary list includes more than 1500 radio sources. ... The superluminal variable source and X-nova GRO J1655-40 has been detected (in 1991.2) in the survey at flux level 100 +-10mJy at 3.9 GHz far before the identification at radio wavelengths. ... Trushkin, S.A. 1994, Preprint of SAO, 107 , 1 . ...

... Анк а дня . ... Apod . Lpod . ... Пояснение: Исследуя небо в поисках галактик, канадский астроном Поль Хиксон вместе со своими коллегами обнаружил около ста тесных групп галактик , которые теперь называют компактными группами Хиксона (Hickson Compact Groups, HCG). ... На картинке хорошо видны детали структуры галактик. ... HCG 90 находится на расстоянии около ста миллионов световых лет в созвездии Южной Рыбы . ... Астрономической картинке дня 8 лет . ... LPOD: Лунная картинка дня . ...