M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• Astronomy Plus CCD Images of Galaxies
• Low Surface Brightness Galaxy Gallery
• Galaxy Gallery Page III

JWST-STScI-002267 SOCCER Entry 10/5/2010 `On' failures in the NIRSpec MEMS ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST NIRSpec Santiago Arribas, Robert Fosbury Peter Jakobsen --1-- JWST-STScI-002267 SOCCER Entry 10/5/2010 ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST ... From this, we can decide on an acceptable number of facet failures. ...

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• Simulation of a Distant Cluster of Normal Galaxies
• Starburst and Galaxy evolution
• The Continuum and Line Spectra of the Seyfert 2 Galaxy NGC 5252: Radiation and

Next: Critical Frequencies and Gravitational Previous: Extragalactic Gravitational Wave Background . The number of binaries per frequency decade per solid angle from a separate stellar system (galaxy or cluster of galaxies) is . ... For example, for the Andromeda galaxy M31 ( rad, ) one gets . ... If the angular size of the galaxy is less than the angular resolution of the detector, the critical frequency is independent of the angular resolution, . ...

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• Gravitational wave background from nearby galaxies
• Critical Frequencies and Gravitational Wave Detector Halfwidth for
• Gravitational Waves from Coalescing Compact Binary Stars

... We measured these galaxies individually, and they are distinguished in our list by the suffixes a, b, c,... in order of increasing J2000 right ascension. ... The first column contains the UGC catalog number, to which we have added lower-case suffixes a, b, c,\dots in order of increasing J2000 right ascension to distinguish individual galaxies in groups. ... The third column lists the degrees, arcminutes, and arcseconds of J2000 declination plus the rms uncertainty in arcseconds. ...

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• Cosmology FAQ: Why haven't the CMBR photons outrun the galaxies in the Big...
• A 20 cm VLA survey of Abell clusters of galaxies
• HyperLEDA documentation : compilation of position angles (a103)

... Figures 1 and 2: Neutral hydrogen distribution (top) and mean velocity field (bottom) of the galaxy NGC 3882 (v = 1817 km/s) and a new companion galaxy, ATCA J1147-56 (v = 1760 km/s). ... The total HI flux densities are about 32.4 Jy km/s for NGC3882 and 0.6 Jy km/s for ATCA J1147-56; beam size: 107 arcsec x 88 arcsec. ... Figure 6: ATCA HI global spectrum of the new galaxy, ATCA J1147-56. ... Figure 7: HIPASS spectrum of NGC 3882 (v = 1817 km/s). bkoribal @ atnf.csiro.au ...

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• The ``HIPASS Bright Galaxy Catalog'' (version-4)
• HIPASS Bright Galaxy Catalog
• The Local Volume HI Survey (LVHIS)

... О Далекой Галактике . ... Теперь в Далекой Галактике вы всегда можете увидеть свежие фотографии Солнца. ... Форум . Форум "Далекой Галактики" - прекрасное место для общения всех астрономов. ... Новости из космоса . ... Подписаться на новости Далекой Галактики Вы можете здесь: . ... Новости из Далекой Галактики - популярно об Астрономии . ... Если вы хотите выразить свое мнение о сайте "Далекая Галактика", или просто почитать мнения других посетителей - пожалуйста, заходите в Гостевую книгу . ...

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. Back to A.Zasov's homepage.

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... In this talk, I will discuss a study of the effect of ionization on the low end of HI mass function. The existence of a large population of low mass galaxies follows from CDM theory. ... HIDEEP found no low HI column density galaxies. One possible explanation is that the disks are "frozen". ... We assume that galaxies are exposed to an ionizing background radiation, from a uniform quasar distribution. ... We find a gap in the average column densities around N H which drops to 10 17 cm -2 . ...

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• Arecibo Galaxy Environment Survey (AGES)
• I-GALFA: The Inner Galaxy ALFA Low Latitude HI Survey
• HISA Poster for the 195th Meeting of the AAS, January, 2000

Blueshifted galaxies in the Virgo cluster I. D. Karachentsev, O. G. Nasonova (Kashibadze), Special Astrophysical Observatory, Russia We consider a sample of 65 galaxies with negative radial velocities with respect to the Lo cal group in the Virgo cluster. ... E, S0 20 ° The radial velo city VLG ­ magnitude mB distribution of sample ob jects. ... The centroid drift for galaxies ranged by VLG from zero to the extremal negative velo city (-866 km/s). ...

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• A unique isolated dwarf spheroidal galaxy KKR25
• New Polar Ring Galaxies
• RCJ0311+0507

.

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• Stars and Galaxies
• Sample Identification
• Map of the positions of thousands of galaxies in the VIPERS survey | ESO

... APOD: 2008 January 2- A Galaxy is not a Comet . ... Credit: Emiel Kempen Explanation: This gorgeous galaxy and comet portrait was recorded on December 30th, in the skies over Hoogeveen, The Netherlands. The combined series of 60 x 60 second exposures finds the lovely green coma of Comet 8P/Tuttle near its predicted conjunction with the Triangulum Galaxy . Aligning each exposure with the stars shows the comet as a streak, slowly moving against the background stars and galaxy. ... January 2008 . ...

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• Астронет > APOD: 2008 January 2- A Galaxy is not a Comet
• XWare > APOD

... 2008 January 2 . A Galaxy is not a Comet . ... Explanation: This gorgeous galaxy and comet portrait was recorded on December 30th, in the skies over Hoogeveen, The Netherlands. The combined series of 60 x 60 second exposures finds the lovely green coma of Comet 8P/Tuttle near its predicted conjunction with the Triangulum Galaxy . Aligning each exposure with the stars shows the comet as a streak, slowly moving against the background stars and galaxy. ... About APOD | ...

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• APOD: 2004 January 31 - A Galaxy is not a Comet
• APOD: 2002 April 12 - A Galaxy is not a Comet
• APOD: 2010 June 20 - Abell 2218: A Galaxy Cluster Lens

... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . ... Galaxies, AGN, Cosmology . ... Star formation . ... The impact of Warm Dark Matter of the ages of galaxies . ... Nicola Menci (INAF-Rome) and collaborators have delevoped a model (the Rome semi-analytic model) that connects the physics of gas and star formation in galaxies with the merging history of dark matter halo in a Warm Dark Matter scenario. ...

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• SECCO1: an "almost-dark" dwarf galaxy
• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope
• Positions

... MATERIAL: astronomical data visualization software like ds9 , IRAF, and the two galaxy images in the V-band and I-band . ... You received images in the V and I-band of an unknown, partially resolved Milky Way dwarf satellite galaxy. Your task is to generate a color-magnitude diagram (CMD) of this stellar system, find out what kind of stellar population it is made of (old, young?) and estimate its distance from the sun using well-known features identified in the CMD. ...

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• Dark Matter in Spiral Galaxies
• Giant Galaxy String Defies Models of How Universe Evolved
• GSAOI Dwarf Galaxies Science Page

Milky Way X-ray background emission « »: , . ... RXTE , . ... Using near-infrared Galaxy intensity measured with COBE/DIRBE experiment and X-ray data from RXTE and INTEGRAL it was shown that X-ray brightness of the Galactic background emission closely follows its stellar density and can be explained by a cumulative emission of a large number of weak Galactic X-ray sources. ... Map of Galactic background emission in hard X-ray energy band obtained with INTEGRAL observatory. ... 2006, &, 452, 169 ., ...

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• http://hea.iki.rssi.ru/integral06/papers/D32_Khamitov01-04Oct06_10:26:31.pdf
• http://hea.iki.rssi.ru/ru/Posters/INTEGRAL_2007_anisotropy.pdf
• z90-program

... Searching for Far Out and Wandering Worlds . ... The Real Reality Show: Would aliens be anything like us? ... The SETI Institute is after alien signals. Assuming another world is beaming a 1-million-watt radio signal in our direction, how far away can that source be before the signal is lost in intergalactic noise? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

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• When a gravitational lens magnifies a background galaxy, why don't we see the
• Mars orbiter repositioned to phone home Mars landing | Astronomy.com
• Do orbital motions between galaxies affect calculations of the cosmological

... Cross-shaped galaxy ZGC 2315+03 (Fig.1) has been described by Zwicky (1971) as ``post-eruptive or the result of the crossing of a compact galaxy through an edge-on spiral'' . This object was included in the Polar-Ring Catalog (C-71) by Whitmore et al. (1990) as a possible candidate for Polar-Ring Galaxies (PRG). ... One of them is galaxy 'disk' and the other is 'polar-ring'. ... The facts against the polar-ring nature of ZGC 2315+03 can be summarized as follows: . ...

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• Vladimir P. Reshetnikov's Home Page
• Modelling the Milky Way in the Era of Gaia - JD5 Rationale
• The Stellar Content and Distance to the Nearby Blue Compact Dwarf Galaxy

... Courtesy of NASA/ESA Observation data (J2000 epoch) Constellation Right ascension Declination Redshift Distance Type Serpens Caput 15h 17m 14.4s[] +21° 35 08[] 12,740±50 km/s[][1] 600±30 Mly (183±8 Mpc)[1] SA0(r) [citation needed ] [a] Apparent dimensions (V) 0.28 в 0.28[] Apparent magnitude (V) 16.0[] Notable features Ring galaxy Other designations PGC 54559,[] PRC D-51[] See also: Galaxy, List of galaxies Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. ...

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... Posts tagged ?host galaxy? ... Without an optical afterglow, a galaxy within the 2 arc second error region of a GRB x-ray afterglow is identified as a host galaxy; however confusion can rise due to the facts that 1. the edge of a galaxy is diffused, 2. multiple sources could exist within 2 arc second error region, 3.the distance between the galaxy and the x-ray afterglow is measured by projection, and 4. lensing causes increase of brightness and position shifts. ... ArXiv] GRB host galaxies, Aug. ...

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• The AstroStat Slog Blog Archive [ArXiv] GRB host galaxies, Aug. 10, 2007
• The AstroStat Slog background
• The galaxy M100

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

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• The Co-Addition Technique Applied to Images of Galaxy Cores
• Towards Optimal Analysis of HST Crowded Stellar Fields
• ADASS 2003 Conference Proceedings