Jul y 9- 11,
... central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnants of the first massive stars rather than via direct gas collapse. Consequently, measurement of the local occupation fraction provides an observational discriminator b ...
... central supermassive black holes (SMBHs) will be more often present even in smaller galaxies when seeds are generated from the remnants of the first massive stars rather than via direct gas collapse. Consequently, measurement of the local occupation fraction provides an observational discriminator b ...
SherwoodWA_1973redux - Edinburgh Research Archive
... 1970; Gottesman and Davis, 1970) found that the HII regions and blue supergiants (in associations) lie within the ...
... 1970; Gottesman and Davis, 1970) found that the HII regions and blue supergiants (in associations) lie within the ...
Lecture 2
... the ISM in these galaxies and…study in detail the spacially resolved kinematic structure of most of the gas…which resides in the cold phase” (Carilli & Blain ...
... the ISM in these galaxies and…study in detail the spacially resolved kinematic structure of most of the gas…which resides in the cold phase” (Carilli & Blain ...
Clusters as laboratories for the study of galaxy evolution
... published cluster galaxies suggests a more recent formation epoch, around z=1.5 for field galaxies compared to z>2.0 for cluster galaxies. The magnitude difference implies that the field early-type galaxies are about 2 Gyr younger than the cluster ellipticals using standard single-burst models. Howe ...
... published cluster galaxies suggests a more recent formation epoch, around z=1.5 for field galaxies compared to z>2.0 for cluster galaxies. The magnitude difference implies that the field early-type galaxies are about 2 Gyr younger than the cluster ellipticals using standard single-burst models. Howe ...
Article PDF - IOPscience
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
Stars & Galaxies - newmanlib.ibri.org
... Lifespan of a G Star • When it uses up the H in its core, it expands to form a red giant, burning H in an outer shell & He in the core. • When the He is gone, the star collapses to form a white dwarf. • The dwarf gradually cools till it ceases to shine, becoming a ...
... Lifespan of a G Star • When it uses up the H in its core, it expands to form a red giant, burning H in an outer shell & He in the core. • When the He is gone, the star collapses to form a white dwarf. • The dwarf gradually cools till it ceases to shine, becoming a ...
Binarity in carbon-enhanced metal-poor stars
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
Galactic Stellar and Substellar Initial Mass Function Invited Review Gilles Chabrier
... and to be well described by a power-law form for m ! 1 M, and a lognormal form below, except possibly for early star formation conditions. The disk IMF for single objects has a characteristic mass around mc ∼ 0.08 M, and a variance in logarithmic mass j ∼ 0.7 , whereas the IMF for multiple systems h ...
... and to be well described by a power-law form for m ! 1 M, and a lognormal form below, except possibly for early star formation conditions. The disk IMF for single objects has a characteristic mass around mc ∼ 0.08 M, and a variance in logarithmic mass j ∼ 0.7 , whereas the IMF for multiple systems h ...
Portable CDK Alt-Az Telescope.qxp
... of alt-az telescopes do not change their orientation with respect to local gravity, while their optical tube assemblies (OTAs) only change their orientation in one plane (altitude) instead of two (right ascension and declination). As a result, the cost of large alt-az telescopes and their enclosures ...
... of alt-az telescopes do not change their orientation with respect to local gravity, while their optical tube assemblies (OTAs) only change their orientation in one plane (altitude) instead of two (right ascension and declination). As a result, the cost of large alt-az telescopes and their enclosures ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... 2. A reliable distance (i.e., determined from stellar constituents, such as Cepheids and the tip of the RGB [TRGB]). ...
... 2. A reliable distance (i.e., determined from stellar constituents, such as Cepheids and the tip of the RGB [TRGB]). ...
Super-solar Metal Abundances in Two Galaxies at ζ ∼ 3.57
... We report on the surprisingly high metallicity measured in two absorption systems at high redshift, detected in the Very Large Telescope spectrum of the afterglow of the gamma-ray burst GRB 090323. The two systems, at redshift z = 3.5673 and z = 3.5774 (separation ∆v ≈ 660 km s−1 ), are dominated by ...
... We report on the surprisingly high metallicity measured in two absorption systems at high redshift, detected in the Very Large Telescope spectrum of the afterglow of the gamma-ray burst GRB 090323. The two systems, at redshift z = 3.5673 and z = 3.5774 (separation ∆v ≈ 660 km s−1 ), are dominated by ...
A Search for Extrasolar Planets Using Echoes Produced in Flare
... emitted from the star. An implicit assumption is that the pulse of light propagates in all directions equally and simultaneously; that the pulse radiates isotropically. For the observer on Earth the pulse follows two paths: one directly to the observer, the other to the nearby object where the pulse ...
... emitted from the star. An implicit assumption is that the pulse of light propagates in all directions equally and simultaneously; that the pulse radiates isotropically. For the observer on Earth the pulse follows two paths: one directly to the observer, the other to the nearby object where the pulse ...
azu_etd_13224_sip1_m
... Within the last 20 years, and particularly during the time I have been in graduate school, the search for and discovery of planets outside of our Solar System has accelerated dramatically, exposing the great diversity in the outcomes of planet formation and evolution within our Galaxy. The raw mater ...
... Within the last 20 years, and particularly during the time I have been in graduate school, the search for and discovery of planets outside of our Solar System has accelerated dramatically, exposing the great diversity in the outcomes of planet formation and evolution within our Galaxy. The raw mater ...
Hubble Space Telescope Imaging of Post
... At HSTs resolution (∼0.0500 ) and an average redshift of hzi ∼ 0.319, an galaxy with a 500 diameter corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributio ...
... At HSTs resolution (∼0.0500 ) and an average redshift of hzi ∼ 0.319, an galaxy with a 500 diameter corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributio ...
Hunting for Substructure in the Milky Way
... direction of the North Galactic Pole. In order to conserve angular momentum, over time this orbit remains approximately circular. Astronomers measure the velocity and distances of stars to analyse the angular momentum, and from this they can determine how circular the orbit of each star is. In previ ...
... direction of the North Galactic Pole. In order to conserve angular momentum, over time this orbit remains approximately circular. Astronomers measure the velocity and distances of stars to analyse the angular momentum, and from this they can determine how circular the orbit of each star is. In previ ...
THE MORPHOLOGICAL DEMOGRAPHICS OF GALAXIES IN THE
... We present a morphological analysis of distant field galaxies using the deep ACS images from the public parallel NICMOS observations of the Hubble Ultra Deep Field obtained in the F435W (B 435 ), F606W (V606 ), F775W (i775 ) and F850LP (z850 ) filters. We morphologically segregate galaxies using a c ...
... We present a morphological analysis of distant field galaxies using the deep ACS images from the public parallel NICMOS observations of the Hubble Ultra Deep Field obtained in the F435W (B 435 ), F606W (V606 ), F775W (i775 ) and F850LP (z850 ) filters. We morphologically segregate galaxies using a c ...
The Life and Work of Edward Emerson Barnard
... his sick bed long enough to note that the ring was still visible in the 40-inch telescope, though 'very thin' and with a satellite at each end. 'Without occultation it was almost impossible to see any trace of the ring on the sky,' he noted 'The condensations were feebly seen as slightly brighter pa ...
... his sick bed long enough to note that the ring was still visible in the 40-inch telescope, though 'very thin' and with a satellite at each end. 'Without occultation it was almost impossible to see any trace of the ring on the sky,' he noted 'The condensations were feebly seen as slightly brighter pa ...
The Revolution in Telescope Aperture
... fabrication of large, high quality mirrors with short focal lengths, and sophisticated computercontrolled telescopes and instruments. Lastly, advances in adaptive optics at near-infrared wavelengths should soon allow us to build large telescopes that are essentially diffraction limited. This will re ...
... fabrication of large, high quality mirrors with short focal lengths, and sophisticated computercontrolled telescopes and instruments. Lastly, advances in adaptive optics at near-infrared wavelengths should soon allow us to build large telescopes that are essentially diffraction limited. This will re ...
Stars and Planets Credits and Acknowledgements
... learn about the discoveries of Jupiter-like planets around other stars and make scale models of several of these planetary systems to compare to our own solar system. The students are also be introduced to current planet hunting efforts, and future projects ...
... learn about the discoveries of Jupiter-like planets around other stars and make scale models of several of these planetary systems to compare to our own solar system. The students are also be introduced to current planet hunting efforts, and future projects ...
Annual Report 2006/2007
... when the Universe was less than 5% of its present age. The theme of the NOVA Program is to unravel the history of the universe and to further develop the understanding of the life cycle of stars and galaxies. The NOVA research program concentrates on the following three interconnected areas: • Netw ...
... when the Universe was less than 5% of its present age. The theme of the NOVA Program is to unravel the history of the universe and to further develop the understanding of the life cycle of stars and galaxies. The NOVA research program concentrates on the following three interconnected areas: • Netw ...
Document
... the estimated position, brightness, colour and other parameters of each source are locked into a consistent and coherent framework. However, in the first data release, based on less than a quarter of the total amount of data that will be collected by Gaia over its entire mission, this iterative loop ...
... the estimated position, brightness, colour and other parameters of each source are locked into a consistent and coherent framework. However, in the first data release, based on less than a quarter of the total amount of data that will be collected by Gaia over its entire mission, this iterative loop ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
Reflecting Telescopes
... image distortions, but these are removed by means of a glass corrector plate fixed at the upper end of the tube. The SCHMIDT TELESCOPE corrector has a complex aspheric profile, the Maksutov corrector has spherical surfaces. The detector, say a photographic plate, a photographic film, or a mosaic of ...
... image distortions, but these are removed by means of a glass corrector plate fixed at the upper end of the tube. The SCHMIDT TELESCOPE corrector has a complex aspheric profile, the Maksutov corrector has spherical surfaces. The detector, say a photographic plate, a photographic film, or a mosaic of ...
The Tools of Astronomy
... striking the lens parallel to the axis are refracted to pass through the focus. Astronomical telescopes are often used to make images of their field of view (simply, the portion of the sky that the telescope “sees”). Figure 5.3 illustrates how that is accomplished, in this case by the mirror in a re ...
... striking the lens parallel to the axis are refracted to pass through the focus. Astronomical telescopes are often used to make images of their field of view (simply, the portion of the sky that the telescope “sees”). Figure 5.3 illustrates how that is accomplished, in this case by the mirror in a re ...
Distance determination for RAVE stars using stellar models
... Our method requires a set of model stars. As was discussed in Sect. 2.1, we have chosen to use the Y 2 models (Demarque et al. 2004). We generate our set of isochrones using the YYmix2 interpolation code. The set consists of 600 isochrones, with 40 different ages, spaced logarithmically between 0.01 ...
... Our method requires a set of model stars. As was discussed in Sect. 2.1, we have chosen to use the Y 2 models (Demarque et al. 2004). We generate our set of isochrones using the YYmix2 interpolation code. The set consists of 600 isochrones, with 40 different ages, spaced logarithmically between 0.01 ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.