... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

The Astronomical Catalog portion of CDBS contains several atlases consisting of both observed and model stellar,galactic, and emission line object spectra as well as HST standard stars spectra are available in STSDAS table format for use in the calibration of HST instruments, with synphot, with the exposure time simulators, or for any other purpose. this is it There are two independent directories containing the spectra of ultraviolet and optical standard stars. ... For details see K93MODELS . ...

ARCSAT ID NUMBER: AS06 DESCRIPTIVE TITLE: Stromgren Photometry of Galactic Peripherys and Streams PI: Dmitry Bizyaev OBSERVER(S): Dmitry Bizyaev UNCERTIFIED/UNTRAINED OBSERVERS: N/A COLLABORATORS: CONTACT INFORMATION: dmbiz@apo.nmsu.edu TIME REQUESTED: 1 week in the dark time between April 17 and July 3, 2016 INSTRUMENT: SurveyCam FILTERS : Stromgren uvby, 2 square COMMENTS: remote observations BRIEF SCIENCE JUSTIFICATION: Last decade numerous faint ... 2014). ... 2014, ApJ, 787, 24 ...

... Using the self-consistent 3D hydrodynamical code in Kobayashi et al. (2007) , we simulate the star formation and chemical enrichment history of the Universe. ... We also predict the rates of supernovae and gamma-ray bursts, and the properties of the host galaxies, which will be observed with the ANU's new SkyMapper telescope. ... Supernova feedback on galaxy formation. ... Feedback from active-galactic nuclei (AGN). ... COALA : Universe Galaxy AGN Star Planet ...

HI spectral-line observations of galaxies (Karen O'Neil) . Measuring the width, flux, etc. of the HI profile of two galaxies, using some combination of : dwarf emission line, HVC emission line, spiral emission line, and spiral absorption line. This project was designed to demonstrate the fundamentals of spectral line observing and position switching. ... The types of galaxies observed in this project are being kept open and will be determined when the project LST is known. ...

... Posts tagged ?standard candle? ... In addition to Bayesian methodologies, like this week?s astro-ph, studies on characterizing empirical spatial distributions of voids and galaxies frequently appear, which I believe can be enriched further with the ideas from stochastic geometry and spatial statistics. Click for what was appeared in arXiv this week. ... 1 Comment . ... If you find any problems of viewing the slog, please notify me. ... Entries RSS . ... Entries (RSS) and Comments (RSS) . ...

... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

... Tonight's Sky . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . The Golden Earring, planetary nebula NGC 2867, and barred spiral galaxy NGC 3109 . Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Dwarf galaxies donт??t fit standard model . ... DWARF GALAXIES | ...

... Data of obs. ... Reduced (Paper I) . NGC 0023 . VIII.1998 . ... NGC 0132 . ... Reduced . NGC 0157 . ... NGC 0615 . ... NGC 0753 . ... NGC 0945 . ... Bad data (clouds); . NGC 0972 . ... II.1998 . ... NGC 1024 . ... NGC 1058 . ... NGC 1073 . ... NGC 1084 . ... NGC 1134 . ... NGC 1637 . ... NGC 2276 . ... NGC 2608 . ... NGC 2964 . ... NGC 3184 . ... Bad data (low S/N) . NGC 3338 . ... Bad data (IFP failure) . NGC 3344 . ... Reduced (bad data) . ... Back to Project Vortex. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Tips on holding a viewing night . ... Gas and Galaxy Formation . ...

Next: Transparency of the Stochastic Up: Model of the Galaxy Previous: Frequency distribution of galactic . ... The parameters of the model resulted from a numerical fitting of various data, such as the observed distribution of the young star population and neutral hydrogen, the density of population II stars in the vicinity of the Sun, the galactic rotation curve and the dynamics and distribution of globular clusters   and dwarf irregular satellites of the Galaxy. ...

... Unexpected Galaxy String in the Early Universe . ... 20.01.2004 . ... NSF , NASA Explanation: How could such a long string of galaxies form so early in the universe? Several new measurements of galaxies and clusters in the early universe are reporting structures involving galaxies and clusters that are larger than expected with the new standard "dark-energy" cosmology . ... Publications with keywords: galaxies - early universe . Publications with words: galaxies - early universe . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

Observed maximum rotation velocity uncorrected for inclination effect. This quantity is calculated from 21-cm line widths at different levels and/or rotation curves (generally in H_alpha). ... These data are characterized by some secondary parameters: telescope, velocity resolution, level of the 21-cm line width and bibliographic reference. ... we start from a standard sample (a set of measurements giving a large and homogeneous sample). ... HyperLeda . ...

... 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. ...

... Science . ... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Properties of kinematically decoupled structures in Early-Type Galaxies . ... Science Users Information . ... ESO-MIDAS . ... ESO Science Newsletter . ... The project consists in measuring the stellar kinematics, stellar populations, dynamics, and morphological properties of the kinematically decoupled structures observed in the inner regions of Early-Type Galaxies. ... Return to list of thesis topics...

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The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...

... The study of the Large-scale structure of the Universe and measurements of the Dark Energy equation of state; The exploration of the growth and cosmological evolution of supermassive Black holes in the Universe. ... In course of the all sky survey SRG will discover about 100 000 galaxy clusters and 3 million AGNs. Galaxy clusters are the largest gravitationally bounded objects in the Universe and are best explored through the study of X-ray emission from the hot intergalactic gas. ... 2016 IKI RAN ...

... 2004 January 20 . Unexpected Galaxy String in the Early Universe . ... Explanation: How could such a long string of galaxies form so early in the universe? Several new measurements of galaxies and clusters in the early universe are reporting structures involving galaxies and clusters that are larger than expected with the new standard "dark-energy" cosmology . The controversy centers on the inability of a dark-energy dominated universe to create such large structures. ... About APOD | ...