PhD Thesis (PDF) . ... The evolution of stars and gas in galaxies. Observing the atomic neutral hydrogen (HI) 21 cm emission and radio continuum emission of galaxies. ... The goal of research is to quantify the neutral atomic hydrogen (HI) gas content galaxies as they evolve with time. ... Neutral atomic hydrogen gas produces a radio signal that can be used to directly measure the amount of gas present. ... USyd Summer Research Scholarship Report (PDF) . ... Research Topic Write Up (PDF) . ...

... Previous: Substepping and its Application to HST Imaging . ... This is a preliminary report on an application of the co-addition technique based upon the Richardson-Lucy algorithm. The combination of high signal-to-noise ground-based images obtained with the ESO NTT using SUSI with high angular resolution HST FOC f/96 images gives new insights on the properties of galaxy cores and their potential time variability. Cores of galaxies are one of the main thrusts of present extragalactic research. ...

... Î Äàëåêîé Ãàëàêòèêå . ... Òåïåðü â Äàëåêîé Ãàëàêòèêå âû âñåãäà ìîæåòå óâèäåòü ñâåæèå ôîòîãðàôèè Ñîëíöà. ... Ôîðóì . Ôîðóì "Äàëåêîé Ãàëàêòèêè" - ïðåêðàñíîå ìåñòî äëÿ îáùåíèÿ âñåõ àñòðîíîìîâ. ... Íîâîñòè èç êîñìîñà . ... Ïîäïèñàòüñÿ íà íîâîñòè Äàëåêîé Ãàëàêòèêè Âû ìîæåòå çäåñü: . ... Íîâîñòè èç Äàëåêîé Ãàëàêòèêè - ïîïóëÿðíî îá Àñòðîíîìèè . ... Åñëè âû õîòèòå âûðàçèòü ñâîå ìíåíèå î ñàéòå "Äàëåêàÿ Ãàëàêòèêà", èëè ïðîñòî ïî÷èòàòü ìíåíèÿ äðóãèõ ïîñåòèòåëåé - ïîæàëóéñòà, çàõîäèòå â Ãîñòåâóþ êíèãó . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... In the late 1970s, jets were discovered in megaparsec-long radio galaxies. ... This involved the first quantitative analysis of jet warping, bending and disruption in galactic halos. ... Hot spots are created where a jet finally crashes into the surrounding medium. ... I extended the so-called Twin Exhaust Model, using numerical simulations to show that hot gas can be ejected in three forms: jets, bubbles and clouds. ...

... Space Research Institute . Main . ... Main results of the experimental and theoretical research completed in 2010 . ... Moon's topography is shown based on LOLA laser altimeter data, white contour shows a permanently shadowed region and a white rhomb indicates LCROSS spacecraft impact location. ... Ultra deep survey of the sky in hard X-rays, performed by INTEGRAL observatory . INTEGRAL observatory has completed the first and the most sensitive survey of the sky in hard X-ray energy band. ...

. Back to A.Zasov's homepage.

This session will provide a forum for a discussion of variety of topics in Astrostatistics following the Special Session "Lectures on Astrostatistics" held on Wednesday morning. It will also anticipate the "Time-Domain and Applicable Methodologies" session scheduled for Thursday morning. ... 111.02 - Andreas Hans Wilhelm Kupper -- Exploding Satellites - The Tidal Debris of the Ultra-Faint Dwarf Galaxy Hercules . ... Moderators: Aneta Siemiginowska (CfA) and Vinay Kashyap (CfA) . ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 19 - 25.05.2014, Forecast on 26.05 - 01.06.2014, Carrington Rotation 2150, 2151 (04,62.05; 31,83.05.2014) SUNSPOT-FORMING ACTIVITY OF THE SUN REMAINED ON THE AVERAGE LEVEL. ... ON THE VISIBLE SOLAR DISK CONSTANTLY OBSERVED 9-6 SMALL SUNSPOT GROUPS. NEXT WEEK IS EXPECTED THE AVERAGE LEVEL OF SUNSPOT-FORMING ACTIVITY. ... FLARE ACTIVITY WAS AT THE MIDDLE LEVEL 24.05 AND AT THE LOW-IN OTHER DAYS. ...

... In this paper we present the results of detailed B, V, R, I, and H study of the isolated nearby blue compact dwarf (BCD) galaxy NGC6789. Judging from the literature the observed galaxy has not been resolved into stars up to now. ... The distance of the galaxy, estimated from the tip of the red giant branch (TRGB) is 2.1 Mpc which places NGC6789 close to the Local Group. ... Key words: nearby galaxies: dwarf galaxies (NGC 6789): distance moduli: star content . ... Distance. ...

... The Co­Addition Technique Applied to Images of Galaxy Cores W. W. Zeilinger Institut f˜ur Astronomie, University of Vienna, T˜urkenschanzstraúe 17, A­1180 Wien, Austria P. Crane, P. GrosbÜl and A. Renzini European Southern Observatory, Karl­Schwarzschild Straúe 2, D­85748 Garching, Germany Abstract. ... One may therefore take full advantage of the high resolution FOC images by co­adding them with (high signal­to­noise) ground­ based data. ... References Crane, P. et al. ...

Îáùàÿ Àñòðîíîìè÷åñêàÿ Êîíôåðåíöèÿ > Òîâàðû äëÿ àñòðîíîìîâ > Ïîëåçíîå äëÿ àñòðîíîìèè . Galaxies And How To Observe Them+ Êðîññ-èíäåêñ . ... Ïîèñê . ... R.Bak . ... Ñàáæåâàÿ êíèãà âåñüìà äîñòîéíîå ðóêîâîäñòâî ïî íàáëþäåíèþ ãàëàêòèê, èìååò ñóùåñòâåííûé íåäîñòàòîê - ó íåå íåò êðîññ-èíäåêñà îáúåêòîâ, ÷òî çàòðóäíÿåò ïîèñê âíóòðè êíèãè. ... AÍÄÐÅÉ= . ... Ñîçâåçäèÿ (ïîèñê è îïèñàíèå) .. Ñîçâåçäèÿ þæíîãî íåáà (ïîèñê è îïèñàíèå) .. Îñåííèå ñîçâåçäèÿ (ïîèñê è îïèñàíèå) .. ...

Blackholes2 Forum Message . ... Post . ... Shifts Are As Would Be Expected. ... Post Message | ... Red and blue shifts can be caused by velocities also. ... The expectd result would be a red or blue shift proportional to the aparent distance an object is from the observer. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... About ATMoB . ... The Observing Committee is starting an Observing Awards Program to promote observing among the membership of the Amateur Telescope Makers of Boston. ... Participant must be a current member of the Amateur Telescope Makers of Boston . ... To qualify for your Observing Award Certificate, turn in your worksheet and drawings to an ATMoB Observing Committee member or observing@atmob.org . ... This Excel sheet has useful macros. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... CI ) - Cm (I )) ( = 2 (I) N 2 2 PKS0558-504 simultaneous fitting The Chi-Squared is the most common statistic in use to fit a function f to data {x, y} : = 2 N ( yi - f ( xi )) 2 2 i N = number of data points i2 = variance (related to the measurement error for yi ) y = independet variable x = dependet variable f = assumed relationship between x and y yi = observed mean f(x i ) = predicted mean Statistical concepts relevant to data ... 2 * < 1 { (I) OVERESTIMATED} BAD FITTING!! ...

Estimating the NEO Population and Impact Risk: Past, Present and Future . ... Since most of the risk resides in the largest impactors, finding that fraction of the largest bodies, and that none of them has a significant chance of impacting in the next century or so, "retires" more than 90 % of the impact risk, including most of the risk of a globally catastrophic impact event. ... In the mid-size range, from ~150 m to ~1 km, the main risk is from tsunami generated by an ocean impact. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Sometimes whole galaxies can be hidden away from us, yet so close we could practically stub our toes on them. ... Now look around: you can clearly see people a few meters away, fuzzily see them 10 meters away, and only barely see them 50 meters away. ... We have detectors that can see colors of light our eyes cannot, like ultraviolet, infrared (also known as IR) and radio waves. ...

The giant planet Jupiter has four large moons, discovered by Galileo and visible through good binoculars. ... A dynamo is created in a magnetic field by an electric circuit, part of which is moving relative to the rest (additional conditions must also be met). ... Furthermore, the plasma between them conducts electricity very well along its magnetic field lines, which act as if they were wires connecting Io and the planet (drawing). ... Exploration" home page (index) Glossary . ...

Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

... In the table given at a separate sheet enumerate in growing order (from 1 to 13) the size and the mass of each object: Milky Way Galaxy, Andromeda Galaxy, Neutron star, Electron, Mercury, The first satellite "Sputnik I", Venus, Pluto, Proton, Red dwarf, Black cat, White (Polar) bear, the Sun. ... Star setting. ... Comet Lovejoy. ... Radio- (operating wavelength is about 21 cm) and optical (operating in the light visible to the naked eye) telescopes have been used to study an astrophysical object. ...

... We suggest simple method of the selection of distant galaxies based on their radio properties. ... RC0015+0503a , RC0015+0503b , RC0015+0501 , RC0034+0513 , RC0038+0449 , RC0042+0504 . ... RC0105+0501 , RC0110+0500 , RC0117+0503 , RC0126+0502 , RC0133+0459 , RC0135+0450 , RC0137+0539 , RC0143+0505 , RC0152+0453 , RC0154+0459 , RC0159+0448 . ... RC0209+0501b , RC0213+0516 , RC0226+0512 , RC0250+0512 . ... RC0302+0456 , RC0308+0454 , RC0311+0507 , RC0318+0456 , RC0355+0449 . ...