2 Justification and benefits in joining TMT
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
Science with the Constellation
... Since their discovery, quasars and active galactic nuclei (AGN) have stood out as uniquely luminous objects in the Universe. Today we are confident that their ultimate power source is the release of gravitational energy sustained by an accretion disk, which is feeding matter directly into a central ...
... Since their discovery, quasars and active galactic nuclei (AGN) have stood out as uniquely luminous objects in the Universe. Today we are confident that their ultimate power source is the release of gravitational energy sustained by an accretion disk, which is feeding matter directly into a central ...
The Terrestrial Planet Finder Mission
... ing through the pupil plane from a plane pupil plane given direction at a certain point on the focal plane, say (0, 0). However, the wave nature of light makes it impossible to concentrate all of the light at a point. Instead, a small disk, called the Airy disk, with diffraction rings around it appe ...
... ing through the pupil plane from a plane pupil plane given direction at a certain point on the focal plane, say (0, 0). However, the wave nature of light makes it impossible to concentrate all of the light at a point. Instead, a small disk, called the Airy disk, with diffraction rings around it appe ...
The Habitability of Proxima Centauri b I: Evolutionary Scenarios
... Centauri are known, the mass MP rox , age, effective temperature T , and composition are not. The spectra and luminosity suggest the mass of Proxima is ∼ 0.12 M (Delfosse et al. 2000). If we adopt this value, then the semi-major axis of b’s orbit is 0.0485 AU and the planet receives 65% of the inst ...
... Centauri are known, the mass MP rox , age, effective temperature T , and composition are not. The spectra and luminosity suggest the mass of Proxima is ∼ 0.12 M (Delfosse et al. 2000). If we adopt this value, then the semi-major axis of b’s orbit is 0.0485 AU and the planet receives 65% of the inst ...
A New Science Strategy for Space Astronomy and Astrophysics
... The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the respo ...
... The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the respo ...
variation in the pre-transit balmer line signal around
... handful of hot planet systems, namely, WASP-12 b (Fossati et al. 2010), HD 189733 b (Ben-Jaffel & Ballester 2013; Bourrier et al. 2013; Cauley et al. 2015), and GJ 436 b (Ehrenreich et al. 2015; see Section 1 of Cauley et al. 2015, for a brief overview). Most recently, Ehrenreich et al. (2015) repor ...
... handful of hot planet systems, namely, WASP-12 b (Fossati et al. 2010), HD 189733 b (Ben-Jaffel & Ballester 2013; Bourrier et al. 2013; Cauley et al. 2015), and GJ 436 b (Ehrenreich et al. 2015; see Section 1 of Cauley et al. 2015, for a brief overview). Most recently, Ehrenreich et al. (2015) repor ...
Chemical analysis of 24 dusty (pre-) main
... Despite the broad wavelength coverage, for several program stars only a few lines turned out to be appropriate for detailed abundance analyses. Such a circumstance is not unusual for A/B-type stars, where the condition that spectral lines with equivalent widths higher than 150 mÅ should be avoided i ...
... Despite the broad wavelength coverage, for several program stars only a few lines turned out to be appropriate for detailed abundance analyses. Such a circumstance is not unusual for A/B-type stars, where the condition that spectral lines with equivalent widths higher than 150 mÅ should be avoided i ...
Kepler Mission
... An update about the Kepler Mission was released on January 17, 2013. NASA reported that one of three remaining reaction wheels, the fourth already out of commission on the spacecraft, was using more torque than it should to spin the instrument. This increase in friction was noticed when the spacecra ...
... An update about the Kepler Mission was released on January 17, 2013. NASA reported that one of three remaining reaction wheels, the fourth already out of commission on the spacecraft, was using more torque than it should to spin the instrument. This increase in friction was noticed when the spacecra ...
Jul y 10-12,
... Almost all Galactic black hole (BH) binaries with low mass donors are transient X-ray sources; we expect most of the X-ray transients (XRTs) observed in external galaxies to be BH binaries also. Obtaining period estimates for extra-galactic XRTs is challenging, but the resulting period distribution ...
... Almost all Galactic black hole (BH) binaries with low mass donors are transient X-ray sources; we expect most of the X-ray transients (XRTs) observed in external galaxies to be BH binaries also. Obtaining period estimates for extra-galactic XRTs is challenging, but the resulting period distribution ...
Long-term monitoring of the short period SU UMa
... of the plateau stage. In order to examine the long-term behavior of V844 Her, we analyzed archival data over the past ten years since the discovery of this binary. Although photometry is not satisfactory in some superoutbursts, we found that V844 Her showed no precursors and rebrightenings. Based on ...
... of the plateau stage. In order to examine the long-term behavior of V844 Her, we analyzed archival data over the past ten years since the discovery of this binary. Although photometry is not satisfactory in some superoutbursts, we found that V844 Her showed no precursors and rebrightenings. Based on ...
Quantitative constraints on starburst cycles in galaxies with stellar
... libraries contain models with burst fractions very close to zero, which are essentially identical to the models in the continuous library, so the new minimum χ2 is guaranteed to be equal to or smaller than the old one. If the new χ2min /Nd lies in the range 2.37-6.25, the probability that the model ...
... libraries contain models with burst fractions very close to zero, which are essentially identical to the models in the continuous library, so the new minimum χ2 is guaranteed to be equal to or smaller than the old one. If the new χ2min /Nd lies in the range 2.37-6.25, the probability that the model ...
Article PDF - IOPscience
... ago, the time delay required for SMBHs to merge (Begelman et al. 1984). This is also comparable to the timescale for driving gas to the center of the merger suggested by other simulations (Di Matteo et al. 2005, 2008; Hopkins et al. 2005; Springel et al. 2005a, 2005b). While this timescale supports ...
... ago, the time delay required for SMBHs to merge (Begelman et al. 1984). This is also comparable to the timescale for driving gas to the center of the merger suggested by other simulations (Di Matteo et al. 2005, 2008; Hopkins et al. 2005; Springel et al. 2005a, 2005b). While this timescale supports ...
The physics and modes of star cluster formation: observations
... phase of early stellar evolution. As many as 50 per cent of all members of a young cluster may have lost their discs and any other accretion signatures at an age of 2–3 Myr. Observations made from space with X-ray observatories, such as the Chandra X-ray Observatory, have shown that young stars emit ...
... phase of early stellar evolution. As many as 50 per cent of all members of a young cluster may have lost their discs and any other accretion signatures at an age of 2–3 Myr. Observations made from space with X-ray observatories, such as the Chandra X-ray Observatory, have shown that young stars emit ...
Studies of molecular clouds at the Galactic centre Roland Karlsson DECLINATION (B1950)
... PAPER I: I contributed to the preparation of the proposal to NRAO, as well as the full procedure for preparing and performing the observations, together with Aage Sandqvist, John Whiteoak and Frank Gardner. The post-observational calibration of the data was made at the VLA together with Aage Sandqvi ...
... PAPER I: I contributed to the preparation of the proposal to NRAO, as well as the full procedure for preparing and performing the observations, together with Aage Sandqvist, John Whiteoak and Frank Gardner. The post-observational calibration of the data was made at the VLA together with Aage Sandqvi ...
Galaxy Evolution Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mauro Giavalisco
... while a star like the Sun keeps burning its hydrogen nuclear fuel for about 10 billion years, one hundred thousand times longer. Thus, about one million years or so after the end of the star formation, when all the massive stars have died out, the luminosity of the galaxy eventually becomes again do ...
... while a star like the Sun keeps burning its hydrogen nuclear fuel for about 10 billion years, one hundred thousand times longer. Thus, about one million years or so after the end of the star formation, when all the massive stars have died out, the luminosity of the galaxy eventually becomes again do ...
Galaxy Evolution
... while a star like the Sun keeps burning its hydrogen nuclear fuel for about 10 billion years, one hundred thousand times longer. Thus, about one million years or so after the end of the star formation, when all the massive stars have died out, the luminosity of the galaxy eventually becomes again do ...
... while a star like the Sun keeps burning its hydrogen nuclear fuel for about 10 billion years, one hundred thousand times longer. Thus, about one million years or so after the end of the star formation, when all the massive stars have died out, the luminosity of the galaxy eventually becomes again do ...
The science case for - Astrophysics
... dominated by poorly understood dark matter and a mysterious vacuum energy density. This progress poses new, and more fundamental, questions, the answers to some of which will perhaps unite astrophysics with elementary particle physics in a new approach to the nature of matter. Some discoveries, made ...
... dominated by poorly understood dark matter and a mysterious vacuum energy density. This progress poses new, and more fundamental, questions, the answers to some of which will perhaps unite astrophysics with elementary particle physics in a new approach to the nature of matter. Some discoveries, made ...
N-Body/SPH simulations of induced star formation in dwarf galaxies
... out that dark matter is necessary to explain large scale structure formation and the origin of galaxies. Structure in the universe is believed to originate hierarchically. Primarily, small density perturbations arise. Pressureless dark matter clumps together in these density perturbations and dark m ...
... out that dark matter is necessary to explain large scale structure formation and the origin of galaxies. Structure in the universe is believed to originate hierarchically. Primarily, small density perturbations arise. Pressureless dark matter clumps together in these density perturbations and dark m ...