Chapter 6 in the LSST Science Book
... systems, which in turn imply higher space velocities. Specifically, the LMC and SMC may not have begun bound to one another, and both may be on their first approach to the Milky Way, not already bound to it. Attempts to model the motion of the Clouds together with a formation model for the Magellani ...
... systems, which in turn imply higher space velocities. Specifically, the LMC and SMC may not have begun bound to one another, and both may be on their first approach to the Milky Way, not already bound to it. Attempts to model the motion of the Clouds together with a formation model for the Magellani ...
Article PDF - IOPscience
... the WFPC2/HST data. A number of initial pre-processing steps are required before running the photometry procedure. First, image defects such as bad columns and saturated pixels are identified using the information provided in the data quality files. They are then masked by setting them to the bad da ...
... the WFPC2/HST data. A number of initial pre-processing steps are required before running the photometry procedure. First, image defects such as bad columns and saturated pixels are identified using the information provided in the data quality files. They are then masked by setting them to the bad da ...
Cooling neutron stars: Theory and observations
... • Warmest observed stars are low-massive; their neutrino luminosity seems to be <= 1/30 of modified Urca • Coldest observed stars are more massive; their neutrino luminosity should be > 30 of modified Urca (any enhanced neutrino emission would do) • Neutron star masses at which neutrino cooling is e ...
... • Warmest observed stars are low-massive; their neutrino luminosity seems to be <= 1/30 of modified Urca • Coldest observed stars are more massive; their neutrino luminosity should be > 30 of modified Urca (any enhanced neutrino emission would do) • Neutron star masses at which neutrino cooling is e ...
Chapter 7 Elliptical Galaxies Chapter 16 Elliptical Galaxies
... So far, no assumption has been made as to whether or not the potential Φ is only due to the particles themselves or has further contributions from other sources. If the potential is only due to the particles described by f, then self-consistency is fulfilled: ...
... So far, no assumption has been made as to whether or not the potential Φ is only due to the particles themselves or has further contributions from other sources. If the potential is only due to the particles described by f, then self-consistency is fulfilled: ...
Multiple Jets from the High-Mass (Proto) stellar Cluster AFGL5142
... at 225 GHz and 8.4 GHz. The 225 GHz continuum emission reveals three prominent peaks MM-1, MM-2 and MM-3 with estimated circumstellar material of 3, 3, and 2 M⊙ , respectively. MM-1 and MM-2 are associated with strong CH3 CN emission with temperatures of 90 ± 20 and 250 ± 40 K, respectively, while b ...
... at 225 GHz and 8.4 GHz. The 225 GHz continuum emission reveals three prominent peaks MM-1, MM-2 and MM-3 with estimated circumstellar material of 3, 3, and 2 M⊙ , respectively. MM-1 and MM-2 are associated with strong CH3 CN emission with temperatures of 90 ± 20 and 250 ± 40 K, respectively, while b ...
The Galactic Environment of the Sun
... deceiving. Over the course of millions of years, interstellar clouds form and dissipate as stars and supernovae stir up the interstellar matter. Fierce stellar winds produced during star formation evacuate cavities in the molecular clouds in which the stars are born. When subsequent supernovae explo ...
... deceiving. Over the course of millions of years, interstellar clouds form and dissipate as stars and supernovae stir up the interstellar matter. Fierce stellar winds produced during star formation evacuate cavities in the molecular clouds in which the stars are born. When subsequent supernovae explo ...
Chapter 5 Stellar Energy Production
... very first generation of stars that formed (Pop III). – No CNO isotopes produced in the big bang. – Thus the first generation of stars must have operated by the PP chain until some of those stars could produce carbon by triple-α (see below). • These considerations are important for understanding the ...
... very first generation of stars that formed (Pop III). – No CNO isotopes produced in the big bang. – Thus the first generation of stars must have operated by the PP chain until some of those stars could produce carbon by triple-α (see below). • These considerations are important for understanding the ...
Pleiades Mythology
... The Iroquois pray to them for happiness. The Cree came to have come to Earth from the stars in spirit form first and then became flesh and blood. They believe that Mythic Mountain is actually the home of the Kachinas [Gods]. This mountain top is sacred. Being the home of the Kachina spirits it is th ...
... The Iroquois pray to them for happiness. The Cree came to have come to Earth from the stars in spirit form first and then became flesh and blood. They believe that Mythic Mountain is actually the home of the Kachinas [Gods]. This mountain top is sacred. Being the home of the Kachina spirits it is th ...
Project Description - SDSS-III
... expansion of the Universe. Large-scale imaging and spectroscopic surveys have revealed rich, complex structure in the outer Milky Way, residual traces of the Galaxy’s hierarchical formation history. These surveys have discovered more than a dozen new members of the Local Group of galaxies and identi ...
... expansion of the Universe. Large-scale imaging and spectroscopic surveys have revealed rich, complex structure in the outer Milky Way, residual traces of the Galaxy’s hierarchical formation history. These surveys have discovered more than a dozen new members of the Local Group of galaxies and identi ...
Constraining planet structure from stellar chemistry: the cases of
... It is thus interesting to see whether for the planets analyzed by Dressing et al. (2015), a compositional correlation between the host stars and their planets is possible, suggesting that it may not be restricted to the solar system case. This is predicted by planet formation models that include equ ...
... It is thus interesting to see whether for the planets analyzed by Dressing et al. (2015), a compositional correlation between the host stars and their planets is possible, suggesting that it may not be restricted to the solar system case. This is predicted by planet formation models that include equ ...
Red Supergiants and Extinction Law in the Large Magelanic Cloud
... the large surface granulation presented in these stars affects broad-band colors and that, due primarily to metallicity, there is a shift in average RSG spectral type: the LMC M-type supergiants scales being cooler than the Galactic scale by 50 K. When compared to distributions of nearby OB stars th ...
... the large surface granulation presented in these stars affects broad-band colors and that, due primarily to metallicity, there is a shift in average RSG spectral type: the LMC M-type supergiants scales being cooler than the Galactic scale by 50 K. When compared to distributions of nearby OB stars th ...
The ATLAS3D Project – XXX. Star formation histories and stellar
... actually rekindled their star formation in recent times, or contrarily, are in the process of recently shutting down star formation for the first time. The role of environment is also somewhat unclear. Previously considered as important for ETGs in general (Thomas et al. 2005; Schawinski et al. 2007 ...
... actually rekindled their star formation in recent times, or contrarily, are in the process of recently shutting down star formation for the first time. The role of environment is also somewhat unclear. Previously considered as important for ETGs in general (Thomas et al. 2005; Schawinski et al. 2007 ...
Observing transiting planets with JWST-
... JWST may shed light on the nature of these planetary classes, by detecting molecular features in the NIR transmission spectra for cloudy super-Earths, or by identifying cloud resonance features in the MIR for hot jupiters. For the hottest planets we study how well JWST can distinguish between variou ...
... JWST may shed light on the nature of these planetary classes, by detecting molecular features in the NIR transmission spectra for cloudy super-Earths, or by identifying cloud resonance features in the MIR for hot jupiters. For the hottest planets we study how well JWST can distinguish between variou ...
15 Years of Science with XMM-Newton
... The large length suggests an origin due to magnetic interaction between the star and the close-in planet. The magnetic field associated with the planet exerts a force on the plasma and the coronal loop when the planet passes close to regions of the stellar surface ...
... The large length suggests an origin due to magnetic interaction between the star and the close-in planet. The magnetic field associated with the planet exerts a force on the plasma and the coronal loop when the planet passes close to regions of the stellar surface ...
cosmic microwave background and foregrounds
... the main physical processes activating them, but their emission is calibrated mainly through observations Unlike CMB, the Galactic emission is strongly inhomogeneous, concentrated on the Galactic plane Unlike CMB, the foregrounds do not possess a black body frequency spectrum Unlike CMB, the foregro ...
... the main physical processes activating them, but their emission is calibrated mainly through observations Unlike CMB, the Galactic emission is strongly inhomogeneous, concentrated on the Galactic plane Unlike CMB, the foregrounds do not possess a black body frequency spectrum Unlike CMB, the foregro ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.