Final Stages of Stellar Evolution - supernovae and the synthesis of
... extraordinarily stable rotation → astronomical clocks measurement of gravitational waves ...
... extraordinarily stable rotation → astronomical clocks measurement of gravitational waves ...
Gamma-Ray Bursts and Puzzles of Core
... galaxies are corrected for the Galactic extinction. Effects of observational selection are as follows: the decrease of amount of measured spectroscopic z after z ≈ 1.2; the z values of host galaxies are mainly obtained by spectra of brighter galaxies. With regard to these effects, the R distribution ...
... galaxies are corrected for the Galactic extinction. Effects of observational selection are as follows: the decrease of amount of measured spectroscopic z after z ≈ 1.2; the z values of host galaxies are mainly obtained by spectra of brighter galaxies. With regard to these effects, the R distribution ...
The Processing and Classification for the Spectra of Six Comets
... classification of comets is relatively rare, one of the reasons is the complexity of the comet’s composition, at a short distance from the sun, there will be the structures such as the coma, comet tail, and so on. The spectroscopic characteristics may differ with different structures[2] . However, from ...
... classification of comets is relatively rare, one of the reasons is the complexity of the comet’s composition, at a short distance from the sun, there will be the structures such as the coma, comet tail, and so on. The spectroscopic characteristics may differ with different structures[2] . However, from ...
Mapping the Pathways of Galaxy Transformation Across Time and
... the connections among mergers, star formation history, and the evolution of the nucleus as a galaxy evolves onto the red sequence. Surprisingly, we have discovered that many these galaxies, which are not currently forming stars, have significant reservoirs of molecular gas, which may fuel the centra ...
... the connections among mergers, star formation history, and the evolution of the nucleus as a galaxy evolves onto the red sequence. Surprisingly, we have discovered that many these galaxies, which are not currently forming stars, have significant reservoirs of molecular gas, which may fuel the centra ...
Type Ia supernovae as stellar endpoints and cosmological tools
... because dark energy is so dilute (1 m3 contains the energy equivalent to a few atoms of hydrogen), its effects can only be seen on vast scales. We must compare supernovae across ~10 Gyr of cosmic time, during which stars and galaxies have undergone substantial evolution. Therefore, it is critical to ...
... because dark energy is so dilute (1 m3 contains the energy equivalent to a few atoms of hydrogen), its effects can only be seen on vast scales. We must compare supernovae across ~10 Gyr of cosmic time, during which stars and galaxies have undergone substantial evolution. Therefore, it is critical to ...
Mercury Flyby 3 - Messenger - The Johns Hopkins University
... focused on compositional measurements will get their third opportunity to observe Mercury during the flyby. The MASCS sensors, both UVVS and the Visible and Infrared Spectrograph (VIRS), will spend ~30 seconds on each of eleven targeted observations, two on locations also targeted for photometry, fo ...
... focused on compositional measurements will get their third opportunity to observe Mercury during the flyby. The MASCS sensors, both UVVS and the Visible and Infrared Spectrograph (VIRS), will spend ~30 seconds on each of eleven targeted observations, two on locations also targeted for photometry, fo ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
Volatiles in protoplanetary disks
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
... a young pre-main sequence star. The gas-rich disk persists during planetesimal and giant planet formation, but not necessarily during the final assembly of terrestrial planets. During the lifetime of a protoplanetary disk, both solidand gas-phase chemistry is active, shaping the initial composition ...
Pulsed Accretion in the Young Binary &
... A Chinese legend transcribed by Denise Kaisler (kaisler@astro .ucla.edu) Since the universe began, there has existed on the edge of the Eastern Sea, a place known as Tanggu. In that place, there is a tree. Fusang is its name. Fusang is a mighty tree ten thousand rods tall. At its very tip, a jade co ...
... A Chinese legend transcribed by Denise Kaisler (kaisler@astro .ucla.edu) Since the universe began, there has existed on the edge of the Eastern Sea, a place known as Tanggu. In that place, there is a tree. Fusang is its name. Fusang is a mighty tree ten thousand rods tall. At its very tip, a jade co ...
Full Text - Departement Natuurkunde en Sterrenkunde
... stars evolve and change, and that one day, they will die and fade, some very quietly, some explosively. We do not have to wait an evolutionary long time to see stellar changes, however. One can detect stellar variability over a wide variety of time scales and amplitudes. In fact, at micromagnitude l ...
... stars evolve and change, and that one day, they will die and fade, some very quietly, some explosively. We do not have to wait an evolutionary long time to see stellar changes, however. One can detect stellar variability over a wide variety of time scales and amplitudes. In fact, at micromagnitude l ...
The low-mass dispersed population around the Lupus clouds
... for the classification of stars in the range of temperatures expected from the spectral energy distribution fits carried out by CSL (T eff . 3700 K in Lupus 1, T eff . 3400 K in Lupus 3 and 4), providing diagnostic features of temperature and surface gravity as well as accretion/outflow diagnostic l ...
... for the classification of stars in the range of temperatures expected from the spectral energy distribution fits carried out by CSL (T eff . 3700 K in Lupus 1, T eff . 3400 K in Lupus 3 and 4), providing diagnostic features of temperature and surface gravity as well as accretion/outflow diagnostic l ...
PDF File
... In the Sun, abundance deviations due to non-LTE effects are generally small, as can be seen from former calculations: +0.05 dex for Fe I (Steenbock 1985), −0.07 dex for C I (Stürenburg & Holweger 1991) and −0.05 dex (−0.01 ... − 0.06 dex) for N I/II (Rentzsch-Holm 1996). Nevertheless, exact solar v ...
... In the Sun, abundance deviations due to non-LTE effects are generally small, as can be seen from former calculations: +0.05 dex for Fe I (Steenbock 1985), −0.07 dex for C I (Stürenburg & Holweger 1991) and −0.05 dex (−0.01 ... − 0.06 dex) for N I/II (Rentzsch-Holm 1996). Nevertheless, exact solar v ...
the comet`s tale - Institute of Astronomy
... of Astronomy in Cambridge, has recently stripped out its “common terminal area” to turn it into offices, on the grounds that these days everyone has their own laptop or desktop. An aim of the meeting was to give potential imagers the opportunity to work through techniques with mentors on hand, all u ...
... of Astronomy in Cambridge, has recently stripped out its “common terminal area” to turn it into offices, on the grounds that these days everyone has their own laptop or desktop. An aim of the meeting was to give potential imagers the opportunity to work through techniques with mentors on hand, all u ...
Tidal Effects on the Oort Cloud Comets and Dynamics of the Sun in
... The Solar System presents a complex dynamical structure and is not isolated from the Galaxy. In particular the comet reservoir of our planetary system, the Oort cloud, is extremely sensitive to the the galactic environment due to its peripheral collocation inside the Solar System. In this framework, ...
... The Solar System presents a complex dynamical structure and is not isolated from the Galaxy. In particular the comet reservoir of our planetary system, the Oort cloud, is extremely sensitive to the the galactic environment due to its peripheral collocation inside the Solar System. In this framework, ...
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... Bedding & Kjeldsen (2003)). Theoretical calculations result in an overestimation of their amplitudes (see Kjeldsen & Bedding, 2001; Houdek & Gough, 2002). For instance, using Gough’s (1976; 1977) non-local and time dependent treatment of convection, Houdek et al. (1999) have calculated expected valu ...
... Bedding & Kjeldsen (2003)). Theoretical calculations result in an overestimation of their amplitudes (see Kjeldsen & Bedding, 2001; Houdek & Gough, 2002). For instance, using Gough’s (1976; 1977) non-local and time dependent treatment of convection, Houdek et al. (1999) have calculated expected valu ...
Science with the Constellation
... 1.2 The Ultimate Limits of Gravity 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 fee ...
... 1.2 The Ultimate Limits of Gravity 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 fee ...
IRAM Annual Report 2012
... degraded, and IRAM is forced to adapt with very tight budget constraints. It is remarkable that IRAM can pursue in such difficult times ambitious projects like NOEMA, a further proof of the outstanding support from the partner organizations CNRS, MPG and IGN. Although numerous investments on new ins ...
... degraded, and IRAM is forced to adapt with very tight budget constraints. It is remarkable that IRAM can pursue in such difficult times ambitious projects like NOEMA, a further proof of the outstanding support from the partner organizations CNRS, MPG and IGN. Although numerous investments on new ins ...
p of the Sky
... 16 – outside field of view, 4 limits better than others GRB 040916B, >13m for t > t0+17min (publ. GCN 2725) GRB 041217, >11.5m for t > t0+30min (publ. GCN 2862) GRB 050123, >12m for t < t0-108min (publ. GCN 2970) GRB 050326, >11m for t < t0-33min (publ. GCN 3146) 2 – within FOV: GRB 040825A (publish ...
... 16 – outside field of view, 4 limits better than others GRB 040916B, >13m for t > t0+17min (publ. GCN 2725) GRB 041217, >11.5m for t > t0+30min (publ. GCN 2862) GRB 050123, >12m for t < t0-108min (publ. GCN 2970) GRB 050326, >11m for t < t0-33min (publ. GCN 3146) 2 – within FOV: GRB 040825A (publish ...
Physics of the Interstellar Medium
... ISM plays a crucial role in many areas of astronomy. Galaxy formation and evolution, the formation of stars, cosmic nucleosynthesis, the origin of large complex, prebiotic molecules and the abundance, structure and growth of dust grains which constitute the fundamental building blocks of planets, al ...
... ISM plays a crucial role in many areas of astronomy. Galaxy formation and evolution, the formation of stars, cosmic nucleosynthesis, the origin of large complex, prebiotic molecules and the abundance, structure and growth of dust grains which constitute the fundamental building blocks of planets, al ...
Galaxies
... around peaks in the dark matter density distribution. Within this framework, astronomers have made great progress in understanding the large-scale clustering of galaxies, as biased tracers of the underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cool ...
... around peaks in the dark matter density distribution. Within this framework, astronomers have made great progress in understanding the large-scale clustering of galaxies, as biased tracers of the underlying dark matter. We have started to understand how baryonic gas within the dark matter halos cool ...