FY12 - National Optical Astronomy Observatory
... frontiers defined by the Astro2010 decadal survey report New Worlds, New Horizons in Astronomy and Astrophysics (NWNH), including characterization of the nature of dark energy, mapping the 3dimensional distribution of dark matter at cosmological distances, exploration and characterization of the tim ...
... frontiers defined by the Astro2010 decadal survey report New Worlds, New Horizons in Astronomy and Astrophysics (NWNH), including characterization of the nature of dark energy, mapping the 3dimensional distribution of dark matter at cosmological distances, exploration and characterization of the tim ...
CoRoT III programme
... CoRoT is working perfectly. In space for more than 1800 days, it has generated 1 Terabyte of scientific data, in 22 periods of quasi-uninterrupted observation. Its photometric accuracy is only a few percent above the photon noise in the seismology channel and twice the photon noise in the exoplanet ...
... CoRoT is working perfectly. In space for more than 1800 days, it has generated 1 Terabyte of scientific data, in 22 periods of quasi-uninterrupted observation. Its photometric accuracy is only a few percent above the photon noise in the seismology channel and twice the photon noise in the exoplanet ...
Galaxy Assembly through Mergers
... another challenge, even though, given their massive nature, they may be responsible for the high mass end of the mass function. Understanding the latter in the local universe, dubbed dry mergers, constitutes the basis of this work. With the availability of large dedicated surveys such as the Sloan D ...
... another challenge, even though, given their massive nature, they may be responsible for the high mass end of the mass function. Understanding the latter in the local universe, dubbed dry mergers, constitutes the basis of this work. With the availability of large dedicated surveys such as the Sloan D ...
Unfolding the Milky Way bulge - International Max Planck Research
... et al. (1998), as a function of Galactic latitude, for 1000 randomly distributed 30′ × 30′ regions between (−8◦ < b < −1◦ ). . . . . . . . . . . . . . . . . . . . 5.8 The upper panel shows the inner ∼ ±2◦ region around the Galactic plane of our VVV extinction map. AKs values are based on Cardelli et ...
... et al. (1998), as a function of Galactic latitude, for 1000 randomly distributed 30′ × 30′ regions between (−8◦ < b < −1◦ ). . . . . . . . . . . . . . . . . . . . 5.8 The upper panel shows the inner ∼ ±2◦ region around the Galactic plane of our VVV extinction map. AKs values are based on Cardelli et ...
my dissertation (PhD. Thesis) - Argelander
... • Galaxies at cosmological distances may show us how they are actually forming and how early stages of galaxies looked like long (several Gigayear) ago. However these objects are very far away, and thus appear very small and faint, so that observational constrictions blur the picture severely. Thusf ...
... • Galaxies at cosmological distances may show us how they are actually forming and how early stages of galaxies looked like long (several Gigayear) ago. However these objects are very far away, and thus appear very small and faint, so that observational constrictions blur the picture severely. Thusf ...
ROSAT Ian R. Stevens* and David K. Strickland*
... We note that the detection of a broad He II l4686 feature can be difficult even with high signal-to-noise ratio (S/N) data. This does mean that our sample of WR galaxies will tend to be rather heterogenous. Future studies will have to focus on broader samples of starburst galaxies and starburst regi ...
... We note that the detection of a broad He II l4686 feature can be difficult even with high signal-to-noise ratio (S/N) data. This does mean that our sample of WR galaxies will tend to be rather heterogenous. Future studies will have to focus on broader samples of starburst galaxies and starburst regi ...
Type Ia supernova spectral features in the context of their host
... Kitt Peak National Observatory 4-metre telescope and the Ritchey– Chretien Spectrograph, and the University of Hawaii 88-inch and the Supernova Integral Field Spectrograph (SNIFS; Lantz et al. 2004). All of the spectra used in this paper are available from the WISeREP archive (Yaron & Gal-Yam 2012), ...
... Kitt Peak National Observatory 4-metre telescope and the Ritchey– Chretien Spectrograph, and the University of Hawaii 88-inch and the Supernova Integral Field Spectrograph (SNIFS; Lantz et al. 2004). All of the spectra used in this paper are available from the WISeREP archive (Yaron & Gal-Yam 2012), ...
harlow shapley - National Academy of Sciences
... of delivering a message to a group of colonists. The boy apparently made the trip across the river and back safely and did deliver the message. There is an old "Shapley House" somewhere in Connecticut facing the ocean. To return to the Shapleys in Missouri. Horace was not interested in being properl ...
... of delivering a message to a group of colonists. The boy apparently made the trip across the river and back safely and did deliver the message. There is an old "Shapley House" somewhere in Connecticut facing the ocean. To return to the Shapleys in Missouri. Horace was not interested in being properl ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... these heavily reddened clusters remained surprisingly poor, and even today there are still a few clusters with exceptionally high reddenings embedded deep in the Galactic bulge about which we know almost nothing (see the listings in Harris 1996a). However, progress over the years has been steady and ...
... these heavily reddened clusters remained surprisingly poor, and even today there are still a few clusters with exceptionally high reddenings embedded deep in the Galactic bulge about which we know almost nothing (see the listings in Harris 1996a). However, progress over the years has been steady and ...
environmental effects on galaxy evolution in nearby clusters
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
... and on these scales the density fluctuations are small in size (rms fluctuations of the order ∼ 0.1 at 1 Gpc). However, on scales of the order of 10 Mpc, the density fluctuations are large (∼ 1). The most apparent overdensities are therefore on small scales, less than 10 Mpc which are the typical sc ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... Mark Brodwin, for a great project. Mike McDonald, for his insights during the latter half of this thesis. Dan McIntosh, for introducing me to the world universe of astrophysics. My thesis defense committee (Stéphane Courteau, David Hanes, Danilo Marchesini, Alastair McLean) for their time and effort ...
... Mark Brodwin, for a great project. Mike McDonald, for his insights during the latter half of this thesis. Dan McIntosh, for introducing me to the world universe of astrophysics. My thesis defense committee (Stéphane Courteau, David Hanes, Danilo Marchesini, Alastair McLean) for their time and effort ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... or obscured optical-to-infrared (IR) SEDs instead, practically indistinguishable from those of spiral/starburst galaxies (Alonso-Herrero et al. 2004, 2008; Rigby et al. 2006; Trump et al. 2009). The star formation activity in the hosts of AGN at z ∼ 1 has been studied by several authors using mid-in ...
... or obscured optical-to-infrared (IR) SEDs instead, practically indistinguishable from those of spiral/starburst galaxies (Alonso-Herrero et al. 2004, 2008; Rigby et al. 2006; Trump et al. 2009). The star formation activity in the hosts of AGN at z ∼ 1 has been studied by several authors using mid-in ...
... concentrate on one important consequence: the buildup of dense central components that look like classical, i.e., merger-built bulges but that were made slowly by disks out of disk material. These are called pseudobulges. Our discussion updates a review by Kormendy (1993). The relative importance of ...
The Pupil mapping Exoplanet Coronagraphic Observer
... bandpass with predicted PIAA performance in the PECO observatory (1.4-m aperture). Photon noise and 16 electrons total detector noise (for an electron-multiplying CCD) have been added. This and other RV planets are very easy detections for PECO even in the presence of significant exozodiacal dust, d ...
... bandpass with predicted PIAA performance in the PECO observatory (1.4-m aperture). Photon noise and 16 electrons total detector noise (for an electron-multiplying CCD) have been added. This and other RV planets are very easy detections for PECO even in the presence of significant exozodiacal dust, d ...
Report from the Subaru Telescope for External
... proto-planetary disks with various morphologies. In addition, frontier pieces of research ...
... proto-planetary disks with various morphologies. In addition, frontier pieces of research ...
CHANDRA X-ray Center Ping Zhao
... Figures 10 and 11 show the optical axis and aimpoint positions on HRC-I and HRC-S. The blue diamonds show the optical axis positions. The red arrows show the aimpoint position drift. While the optical axis is relatively stable, the aimpoint has been drifting in the SIM [−Y,−Z] direction since the Ch ...
... Figures 10 and 11 show the optical axis and aimpoint positions on HRC-I and HRC-S. The blue diamonds show the optical axis positions. The red arrows show the aimpoint position drift. While the optical axis is relatively stable, the aimpoint has been drifting in the SIM [−Y,−Z] direction since the Ch ...
The correlation between galaxy morphology and star
... using large data sets combined in 4 different fields, COSMOS, UDS, GOODS-South and North. Although the Sérsic index, measured by fitting a single Sérsic profile to a galaxy, is the most common approach to analyzing galaxy morphology, it is also useful to study morphologies with non-parametric meas ...
... using large data sets combined in 4 different fields, COSMOS, UDS, GOODS-South and North. Although the Sérsic index, measured by fitting a single Sérsic profile to a galaxy, is the most common approach to analyzing galaxy morphology, it is also useful to study morphologies with non-parametric meas ...
CHANDRA X-ray Center Ping Zhao
... relative position between the aimpoint and optical axis is the intrinsic property of the HRMA and ACA, independent of the detectors. One can therefore calculate the optical axis position on other detectors based on its relative position to the aimpoint. Figures 10 and 11 show the optical axis and ai ...
... relative position between the aimpoint and optical axis is the intrinsic property of the HRMA and ACA, independent of the detectors. One can therefore calculate the optical axis position on other detectors based on its relative position to the aimpoint. Figures 10 and 11 show the optical axis and ai ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other scenarios span a broad range: a young mean age, less dust, a lower metallicity, perhaps ...
... poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other scenarios span a broad range: a young mean age, less dust, a lower metallicity, perhaps ...
THE STAR FORMATION AND NUCLEAR ACCRETION HISTORIES OF NORMAL GALAXIES
... spectroscopic signatures of AGNs, both obvious broadlined systems and those with emission-line ratios characteristic of Type II optical AGNs. We also carried out a principal component analysis of the optical spectra (e.g., Formiggini & Brosch 2004, Ferreras et al. 2006). In our analysis, the level o ...
... spectroscopic signatures of AGNs, both obvious broadlined systems and those with emission-line ratios characteristic of Type II optical AGNs. We also carried out a principal component analysis of the optical spectra (e.g., Formiggini & Brosch 2004, Ferreras et al. 2006). In our analysis, the level o ...
User`s Manual for the 84cm and 1.5m Telescopes
... Figure 4: The main window of the telescope console's graphical interface at the command prompt in any terminal window. The graphical interface opens the window shown in Figure 4. There are two tabs: TELESCOPIO and CATALOGO. The TELESCOPIO page is the console interface proper while the CATALOGO page ...
... Figure 4: The main window of the telescope console's graphical interface at the command prompt in any terminal window. The graphical interface opens the window shown in Figure 4. There are two tabs: TELESCOPIO and CATALOGO. The TELESCOPIO page is the console interface proper while the CATALOGO page ...
11 01 04 Portable M Class Astro
... tracking or autoguiding. Because they are alt-az telescopes, their fields rotate, so accurate instrument de-rotation is required. Operating out in the open, general purpose imaging telescopes need to be resistant to wind gusts. This can be achieved by designing inherently stiff telescopes with low a ...
... tracking or autoguiding. Because they are alt-az telescopes, their fields rotate, so accurate instrument de-rotation is required. Operating out in the open, general purpose imaging telescopes need to be resistant to wind gusts. This can be achieved by designing inherently stiff telescopes with low a ...
A Universal Stellar Initial Mass Function? A Critical Look Further
... specific local and extragalactic environments clearly warrant further study. However, there is no clear evidence that the IMF varies strongly and systematically as a function of initial conditions after the first few generations of stars. ...
... specific local and extragalactic environments clearly warrant further study. However, there is no clear evidence that the IMF varies strongly and systematically as a function of initial conditions after the first few generations of stars. ...
The most metal-poor galaxies
... 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Schechter 1974). Because dwarf galaxies condense from smaller perturbations than giants, the Cold Dark Matter models (CDM) predict that low mass galaxies could still be forming at the ...
... 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Schechter 1974). Because dwarf galaxies condense from smaller perturbations than giants, the Cold Dark Matter models (CDM) predict that low mass galaxies could still be forming at the ...
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.