black body temperature - Herschel Space Observatory
... – Neutral hydrogen Multiwavelength Astronomy ...
... – Neutral hydrogen Multiwavelength Astronomy ...
PDF hosted at the Radboud Repository of the Radboud University
... It should be noted that despite the general homogeneity of type Ia supernova explosions, there is growing observational evidence of a number of distinctive sub-groups (e.g. several subclasses of sub- and super-luminous events) which exhibit small, yet noticeable and systematic spectroscopic and phot ...
... It should be noted that despite the general homogeneity of type Ia supernova explosions, there is growing observational evidence of a number of distinctive sub-groups (e.g. several subclasses of sub- and super-luminous events) which exhibit small, yet noticeable and systematic spectroscopic and phot ...
Structure of Hot Molecular Cores
... 3.7 Modeling procedure: Lines . . . . . . . . . . . . . . . . 3.7.1 Line radiative transfer . . . . . . . . . . . . . . 3.7.2 Fitting strategy . . . . . . . . . . . . . . . . . . 3.7.3 The ’final’ model . . . . . . . . . . . . . . . . . 3.8 Modeling results . . . . . . . . . . . . . . . . . . . . . ...
... 3.7 Modeling procedure: Lines . . . . . . . . . . . . . . . . 3.7.1 Line radiative transfer . . . . . . . . . . . . . . 3.7.2 Fitting strategy . . . . . . . . . . . . . . . . . . 3.7.3 The ’final’ model . . . . . . . . . . . . . . . . . 3.8 Modeling results . . . . . . . . . . . . . . . . . . . . . ...
Project T-REX: Italian technologies for E
... project and realization of spectrographs for both ground based and space telescopes. Her participation to such activities have evolved from simple participant, to roles of increasing responsibility, involving coordination of research groups internal to her Institute, at national level and internatio ...
... project and realization of spectrographs for both ground based and space telescopes. Her participation to such activities have evolved from simple participant, to roles of increasing responsibility, involving coordination of research groups internal to her Institute, at national level and internatio ...
Observationes Cometarvm Anni 1618
... comet holds the distinction of being the first recorded comet to be observed with a telescope, on 6 September. This observation was made by Kepler, who described the comet as a large object that resembled a cloud. Those orbital elements of direct interest here are listed in Table ...
... comet holds the distinction of being the first recorded comet to be observed with a telescope, on 6 September. This observation was made by Kepler, who described the comet as a large object that resembled a cloud. Those orbital elements of direct interest here are listed in Table ...
Astronomy 201 Cosmology
... • White holes - a phenomenon analogous to a black hole from which light can only escape. No obvious way to make or power one • Wormholes - conduits between two points in spacetime. Unstable, difficult to avoid singularity without going faster than c, solutions with timelike paths only size of elemen ...
... • White holes - a phenomenon analogous to a black hole from which light can only escape. No obvious way to make or power one • Wormholes - conduits between two points in spacetime. Unstable, difficult to avoid singularity without going faster than c, solutions with timelike paths only size of elemen ...
harlow shapley - National Academy of Sciences
... variables found in these clusters. Curtis favored much reduced distances for these stars, based on intrinsically very much fainter absolute brightnesses. Shapley clearly came out the winner in the first part of the debate; however, there was a second side. Shapley and Curtis each discussed their vie ...
... variables found in these clusters. Curtis favored much reduced distances for these stars, based on intrinsically very much fainter absolute brightnesses. Shapley clearly came out the winner in the first part of the debate; however, there was a second side. Shapley and Curtis each discussed their vie ...
Strongly suggested reading: The stellar halo of the Galaxy
... In Sect. 4, we describe our current knowledge of the metallicity distribution of halo stars, and particularly focus on what it reveals about star formation in the early Universe. We also discuss what chemical abundance patterns tell us about the process of formation of the Galaxy. Not only halo fiel ...
... In Sect. 4, we describe our current knowledge of the metallicity distribution of halo stars, and particularly focus on what it reveals about star formation in the early Universe. We also discuss what chemical abundance patterns tell us about the process of formation of the Galaxy. Not only halo fiel ...
N-Body/SPH simulations of induced star formation in dwarf galaxies
... are formed. After the decoupling of baryonic matter and radiation, baryons fall into the gravitational potentials of the dark matter halos. When the clumps of dark and baryonic matter are sufficiently large, gravity will have increased and will attract other clumps. These clumps will start moving, a ...
... are formed. After the decoupling of baryonic matter and radiation, baryons fall into the gravitational potentials of the dark matter halos. When the clumps of dark and baryonic matter are sufficiently large, gravity will have increased and will attract other clumps. These clumps will start moving, a ...
A Universal Stellar Initial Mass Function? A Critical Look Further
... Way! Elmegreen & Scalo (2006) provide a detailed exploration of the degeneracies involved in inferring a stellar population’s IMF from its measured PDMF and adopted SFH. It is somewhat disconcerting that the break from the Salpeter law identified in many IMF studies needs to be invoked near the plac ...
... Way! Elmegreen & Scalo (2006) provide a detailed exploration of the degeneracies involved in inferring a stellar population’s IMF from its measured PDMF and adopted SFH. It is somewhat disconcerting that the break from the Salpeter law identified in many IMF studies needs to be invoked near the plac ...
David AJ Seargent
... day in the Sun as evidence in their favor mounts and/or attitudes change within the scientific community. A sample of such leftfield hypotheses is included here. Together with the other books of this series, several projects are provided for readers who may like to be more hands-on with this subject ...
... day in the Sun as evidence in their favor mounts and/or attitudes change within the scientific community. A sample of such leftfield hypotheses is included here. Together with the other books of this series, several projects are provided for readers who may like to be more hands-on with this subject ...
Earth Centered Universe Pro V6.0
... use one copy of the Software on one computer for use by any one person at a time. You are additionally permitted to install and use the Software on a second computer, provided this second computer is owned by the licensee or used exclusively by the licensee (for example, a notebook computer used in ...
... use one copy of the Software on one computer for use by any one person at a time. You are additionally permitted to install and use the Software on a second computer, provided this second computer is owned by the licensee or used exclusively by the licensee (for example, a notebook computer used in ...
preprint, pdf version - LESIA
... events observed in Brazil and Chile (4 June 2011) and in Hawaii (23 June 2011). These last two events, as in 22 June 2008, were double events in which Charon and Pluto occulted the same star. In the 4 June 2011 event in particular, both occultations could be recorded at each site. The population of ...
... events observed in Brazil and Chile (4 June 2011) and in Hawaii (23 June 2011). These last two events, as in 22 June 2008, were double events in which Charon and Pluto occulted the same star. In the 4 June 2011 event in particular, both occultations could be recorded at each site. The population of ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... the X axis). (3) The fundamental distance scale used by Shapley { essentially, the luminosity of the RR Lyraes or the tip of the red-giant branch { was about one magnitude brighter than the value adopted today; again, the result was to overestimate distances for almost all clusters. Nevertheless, th ...
... the X axis). (3) The fundamental distance scale used by Shapley { essentially, the luminosity of the RR Lyraes or the tip of the red-giant branch { was about one magnitude brighter than the value adopted today; again, the result was to overestimate distances for almost all clusters. Nevertheless, th ...
the stebbins galaxy: the origins of interstellar medium studies
... the inclination of many astronomers to understand the spiral nebulae as vast stellar structures (‗island universes‘ as they said) and perhaps even galaxies comparable to our own. Moreover, between about 1928 and 1930, the work of Bertil Lindblad (1895 –1965), Jan Oort (1900 –1992), and John Plaskett ...
... the inclination of many astronomers to understand the spiral nebulae as vast stellar structures (‗island universes‘ as they said) and perhaps even galaxies comparable to our own. Moreover, between about 1928 and 1930, the work of Bertil Lindblad (1895 –1965), Jan Oort (1900 –1992), and John Plaskett ...
The physics and modes of star cluster formation: observations
... independent information. Since embedded clusters are very young stellar systems, independent indicators of stellar youth, such as the presence of circumstellar discs, variable emission lines, X-ray emission, etc., can be employed to ascertain membership of individual stars. For typical embedded-clus ...
... independent information. Since embedded clusters are very young stellar systems, independent indicators of stellar youth, such as the presence of circumstellar discs, variable emission lines, X-ray emission, etc., can be employed to ascertain membership of individual stars. For typical embedded-clus ...
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 ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.