... , 2014 Talks by Daniel Colin · · · · · 26 simulations with identical initial conditions halo masses of 1011­1012 M at z~2 stellar masses of 2x109­6x1010 M at z~2 maximal AMR resolution of ~25 pc thermal radiative feedback from stellar winds and SNe no shutdown of cooling no AGNs June 12, 2015 Sandro Tacchella , ETH 10 Evolution of Density Profiles in Simulations Tacchella , Dekel, Carollo+ (in prep) June 12, 2015 ...

... Massive Star Forming Region DR21 in Infrared . ... JPL , Caltech , NASA Explanation: Deep in the normally hidden recesses of giant molecular cloud DR21, a stellar nursery has been found creating some of the most massive stars yet recorded. The orbiting Spitzer Space Telescope 's Infrared Array Camera opened the window into the cloud last year in mid- infrared light. The cloud is opaque to visible light because of dense interstellar dust . ... A Galactic Star Forming Region in Infrared . ...

... Suppose that a NS having a rotational magnetic   luminosity forms a binary system (with semi-major axis a ) with a normal star losing matter in the form of stellar wind (with a loss rate ). ... This means that while deriving the formula for a cavern in the general case, we must take into account the proximity of the normal star. ... It follows from the symmetry considerations that at the anterior point of the cavern (i.e. the point closest to the normal star), . ... If , the cavern is closed. ...

... 2004 April 14 . Massive Star Forming Region DR21 in Infrared . ... Explanation: Deep in the normally hidden recesses of giant molecular cloud DR21, a stellar nursery has been found creating some of the most massive stars yet recorded. The orbiting Spitzer Space Telescope 's Infrared Array Camera opened the window into the cloud last year in mid- infrared light. The cloud is opaque to visible light because of dense interstellar dust . ... About APOD | ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

AN X-RAY TOUR OF MASSIVE STAR-FORMING REGIONS WITH CHANDRA Not Your Grandmother's HII Regions Leisa Townsley Patrick Broos Eric Feigelson Gordon Garmire Konstantin Getman Junfeng Wang The Penn State Chandra/ACIS Star Formation Group Orion: Chandra Orion Ultradeep Project (COUP, PI Feigelson) 2005, ApJS 160 30 Doradus diffuse: Townsley et al. ... 14 O stars, several form a 1 ring. 15 в 15 2MASS image The 40-ksec Chandra/ACIS-I observation of M17 (17 в 17): 0.5­2 keV; 2­8 keV. ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

... As a new Puerto Rican resident, you have a complicated tax status. The short answer for US citizens coming from the US is that you file 1040 claiming all your income for the year you moved, but with form(s) 1116 (credit for foreign tax paid) to reclaim the portion of your Federal tax attributable to income earned (and tax paid) in Puerto Rico. ... Form 1040 and Instructions. ... Publication 514 ``Foreign Tax Credit'', which contains the real instructions for form 1116. ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... Star Atlas . ... solar system . ... stars . ... Observe the Solar System . ... What factors determine if a massive star (say, 100 solar masses) forms instead of a Sun-like star? ... Stars of all masses form from dense clumps within exceptionally cold molecular clouds. ... Massive stars tend to form at the centers of high-mass reservoirs of gas. Get instant access to subscriber content on Astronomy.com! ... A gamma-ray burst hints that LIGO's double black holes started as one massive star . ...

... Inside IDL, STARTABLE is in the table format. ... STAR (string) Identifier of form CCCNNNNNN/CCCNNNN . ... RA (double) Right Ascension [h] . ... BAT (short int) Number in Batten's Catalogue . ... BSC (short int) Number in Bright Star Catalogue . ... ADS (short int) Number in Aitken Double Star Catalogue . ... WDS (long int) Number in Washington Double star catalog . MV (float) Johnson V magnitude (for combined system if multiple) . ... TYPE1 (float) Floating point spectral type of component 1 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Space Flight . ... A glorious cosmic butterffly imaged by the HST (Image credit: NASA/ESA) . This dramatic image looks like some vast cosmic eruption, and that impression is entirely correct. ... Designated NGC 6302 and often called the Butterfly Nebula, this is an example of a planetary nebula. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

... GSAOI Home . ... Science . ... Deep imaging at J , H , and K is required to identify all stellar objects, brown dwarfs, and planetary mass objects in the central region of the Orion Nebula Cluster down to masses comparable to that of Jupiter. This is required to establish the initial mass function, i.e., the number of stars of each mass that have formed, in this region of intense massive star formation. ... The fields of the GSAOI detectors are shown as four green squares in each frame. ...

... The event horizon is the boundary of a black hole) . ... When the supermassive star implodes (collapses under it?s own gravity) a black hole is formed. Many black holes have been found in the centres of galaxies. ... It was thought that black holes don?t give out any energy at all (except when engulfing stars). ... It is thought that as the stars pass near to the centre, they are pulled in by the black hole and forced to remain orbiting around the black hole. ...

As an obligatory preparing for the application to participate in the IAO a short report of National Olympiad of the current year with a set of all problems used on the Olympiad has to be presented by the applicating team. ... The final minutes (protocols written in Latin or Cyrillic in form of tables) of the Olympiad (evaluating of solutions of the students participated in the last stage of the Olympiad) should be included as well. ... Historical data of the National Astronomy Olympiad: . ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

... Bispectrum Speckle Interferometry of the Massive Protostellar Object S140 IRS 1: Evidence for Multiple Outflows . ... P21W Bispectrum speckle interferometry is emplyed to explore the deeply embedded young stellar object S140 IRS 1 and its environment. ... The diffuse structures around IRS 1 seem to trace the interaction of energetic outflows from IRS 1 with the circumstellar material. ...

This document describes how number input can be given to tasks which request numbers from Hermes. ... list selection The following constants are implemented: pi 3.14159.... c speed of light (SI) h Planck (SI) k Boltzmann (SI) g gravitation (SI) s Stefan-Boltzman (SI) m mass of sun (SI) p parsec (SI) BLANK Universal undefined value The following mathematical functions are implemented: abs(x) absolute value of x sqrt(x) square root of x sin(x) sine of x asin(x) inverse sine ...

3) Planets and Brown Dwarfs . ... By its nature, this method is most sensitive to massive planets orbiting close to their stars. ... That means that some of the more massive extrasolar planets could actually be brown dwarfs (although the statistics of the finds suggest that most of them are not). ... Another possible difference between brown dwarfs and massive planets is how they are born. ... They would base the fundamental definition on the mode of formation: a planet is built from planetesimals. ...

... Posts tagged ?massive data? ... Tags: bimodality , chi-square minimization , Classification , CMD , Estimation , machine learning , massive data , model based , PCA , spectral analysis , spectroscopic , survey , VO . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...