Measurement of the earthshine polarization in the B, V, R, and I
... the Moon is a bright and large target for modern astronomical instrumentation and because the contrast between the bright crescent and the dark side of the Moon is very high. It is therefore not straightforward to disentangle the earthshine from the disturbing contributions of the variable atmospher ...
... the Moon is a bright and large target for modern astronomical instrumentation and because the contrast between the bright crescent and the dark side of the Moon is very high. It is therefore not straightforward to disentangle the earthshine from the disturbing contributions of the variable atmospher ...
Star Formation in the Milky Way and Nearby Galaxies Further
... The term dense gas refers generally to gas above some threshold of surface density, as determined by extinction or dust-continuum emission, or of volume density, as indicated by emission from molecular lines that trace densities higher than does CO. Although not precisely defined, suggestions includ ...
... The term dense gas refers generally to gas above some threshold of surface density, as determined by extinction or dust-continuum emission, or of volume density, as indicated by emission from molecular lines that trace densities higher than does CO. Although not precisely defined, suggestions includ ...
kdtalk_jun2005 - The HST Treasury Program on Eta Carinae
... by dust. Result: The stellar wind is essentially polar -- a fairly revolutionary result for wind theory in general. · STIS 1998-2001: [ Sr II ] and other weird emission lines. · STIS 2000: Three-dimensional shape and orientation of the Homunculus. Found that the equatorial debris was ejected in two ...
... by dust. Result: The stellar wind is essentially polar -- a fairly revolutionary result for wind theory in general. · STIS 1998-2001: [ Sr II ] and other weird emission lines. · STIS 2000: Three-dimensional shape and orientation of the Homunculus. Found that the equatorial debris was ejected in two ...
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 ...
Clusters as laboratories for the study of galaxy evolution
... “Clusters…are laboratories for the study of galaxy evolution and may become as useful as star clusters are in the study of stellar evolution” -- Dressler, 1984 Annual Reviews Back in 1984, (and still?) the prevalent view was that clusters were themselves agents that influenced the evolution of gala ...
... “Clusters…are laboratories for the study of galaxy evolution and may become as useful as star clusters are in the study of stellar evolution” -- Dressler, 1984 Annual Reviews Back in 1984, (and still?) the prevalent view was that clusters were themselves agents that influenced the evolution of gala ...
SPIE Astronomical Telescopes and Instrumentation Technical
... MIRI is one of four instruments to be built for JWST, James Webb Space Telescope. It provides imaging, coronography and integral field spectroscopy over the 5-28.5um wavelength range. MIRI is the only instrument which is cooled to 7K by a dedicated cooler, much lower than the passively cooled 40K of ...
... MIRI is one of four instruments to be built for JWST, James Webb Space Telescope. It provides imaging, coronography and integral field spectroscopy over the 5-28.5um wavelength range. MIRI is the only instrument which is cooled to 7K by a dedicated cooler, much lower than the passively cooled 40K of ...
Modern Optical Design
... Study morphological details of most distant galaxies (cosmology) Study details for star and planet formation Study stellar evolution in globular clusters Quasars and Active Galactic Nuclei (black holes) Solar system objects ...
... Study morphological details of most distant galaxies (cosmology) Study details for star and planet formation Study stellar evolution in globular clusters Quasars and Active Galactic Nuclei (black holes) Solar system objects ...
Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
SOHO`s Frequently Asked Questions
... tremendous amount of energy. The temperature at the center of the Sun is about 15 million degrees Celsius! The energy released in this way makes its way outwards towards the surface in the form of radiation (light) and gas motions (just as when you boil a pot of water on your stove, the hot water st ...
... tremendous amount of energy. The temperature at the center of the Sun is about 15 million degrees Celsius! The energy released in this way makes its way outwards towards the surface in the form of radiation (light) and gas motions (just as when you boil a pot of water on your stove, the hot water st ...
Giant molecular clouds in the Local Group galaxy M 33⋆⋆⋆
... at a distance of 840 kpc, is close enough for individual giant molecular clouds (GMCs) to be identified. The goal of this work is to study the properties of the GMCs in this subsolar metallicity galaxy. The CPROPS (Cloud PROPertieS) algorithm was used to identify 337 GMCs in M 33, the largest sample ...
... at a distance of 840 kpc, is close enough for individual giant molecular clouds (GMCs) to be identified. The goal of this work is to study the properties of the GMCs in this subsolar metallicity galaxy. The CPROPS (Cloud PROPertieS) algorithm was used to identify 337 GMCs in M 33, the largest sample ...
Lecture 2
... A typical LBG at z=1-3 has 0.15 magnitudes of dust in E(B-V) => a factor of 5 extinction at 1500Å. This is determined by a combination of SED fitting and line ratios (e.g. H to Ly, or OII to OIII) Current Topics: Lyman Break Galaxies - Lecture 2 ...
... A typical LBG at z=1-3 has 0.15 magnitudes of dust in E(B-V) => a factor of 5 extinction at 1500Å. This is determined by a combination of SED fitting and line ratios (e.g. H to Ly, or OII to OIII) Current Topics: Lyman Break Galaxies - Lecture 2 ...
FY12 - National Optical Astronomy Observatory
... time domain, and exoplanet characterization and the study of their parent stars. Such leadership is exercised through a range of project size, from a few nights to tens of nights per year over several years, and general-purpose instrumentation on world-class facilities. To enable scientific and tech ...
... time domain, and exoplanet characterization and the study of their parent stars. Such leadership is exercised through a range of project size, from a few nights to tens of nights per year over several years, and general-purpose instrumentation on world-class facilities. To enable scientific and tech ...
Landsat program
... procure funding for follow on Landsats and continued operations, but by the end of the year EOSAT ceased processing Landsat data. Landsat 6 was finally launched on October 5, 1993, but was lost in a launch failure. Processing of Landsat 4 and 5 data was resumed by EOSAT in 1994. NASA finally launche ...
... procure funding for follow on Landsats and continued operations, but by the end of the year EOSAT ceased processing Landsat data. Landsat 6 was finally launched on October 5, 1993, but was lost in a launch failure. Processing of Landsat 4 and 5 data was resumed by EOSAT in 1994. NASA finally launche ...
Lichtenknecker- Database of the BAV
... 2 The „ Lichtenknecker -Database of the BAV“ an O ver view The Lichtenknecker-Database of the BAV (LkDB) contains only data of eclipsing binaries – in the meantime more than 173.000 observed times of minima of more than 2.100 stars. The exact number can be found on the starting page of the (O-C)-Ge ...
... 2 The „ Lichtenknecker -Database of the BAV“ an O ver view The Lichtenknecker-Database of the BAV (LkDB) contains only data of eclipsing binaries – in the meantime more than 173.000 observed times of minima of more than 2.100 stars. The exact number can be found on the starting page of the (O-C)-Ge ...
Strongly suggested reading: The Milky Way`s stellar disk
... McMillan 2011; McMillan and Binney 2012), we place more emphasis two aspects that we deem crucial in Galactic disk modeling: – The consideration of ‘mono-abundance’ stellar sub-populations (MAPs), asking the question of ‘what our Milky Way disk would look like if we had eyes for stars of only a narr ...
... McMillan 2011; McMillan and Binney 2012), we place more emphasis two aspects that we deem crucial in Galactic disk modeling: – The consideration of ‘mono-abundance’ stellar sub-populations (MAPs), asking the question of ‘what our Milky Way disk would look like if we had eyes for stars of only a narr ...
G030184-00 - DCC
... Measurements showed that the light from these stars was bent as it grazed the Sun, by the exact amount of Einstein's predictions. ...
... Measurements showed that the light from these stars was bent as it grazed the Sun, by the exact amount of Einstein's predictions. ...
THE MORPHOLOGICAL DEMOGRAPHICS OF GALAXIES IN THE
... galaxy residuals, small variations in the image background can appear even in the most symmetric objects, consequently we add a factor b to√correct for this artificial A signal introduced, such as b = 2σsky Npix , where Npix is the area inside the ellipse mask and σsky is the sky mean standard devia ...
... galaxy residuals, small variations in the image background can appear even in the most symmetric objects, consequently we add a factor b to√correct for this artificial A signal introduced, such as b = 2σsky Npix , where Npix is the area inside the ellipse mask and σsky is the sky mean standard devia ...
Downloaded - Royal Society Open Science
... Decades of unsuccessful attempts to find planets around other Sun-like stars preceded the unexpected 1992 discovery of planetary bodies orbiting a pulsar [1,2]. The three planets around the millisecond pulsar PSR B1257+12 were the first confidently reported extrasolar planets to withstand enduring s ...
... Decades of unsuccessful attempts to find planets around other Sun-like stars preceded the unexpected 1992 discovery of planetary bodies orbiting a pulsar [1,2]. The three planets around the millisecond pulsar PSR B1257+12 were the first confidently reported extrasolar planets to withstand enduring s ...
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 ...
A spectroscopic study of detached binary systems using precise radial velocities
... components and orbital characteristics whose study should be possible with present groundbased interferometers. All eight of the binary systems have had their mass ratio and the masses of their components estimated. The following comments summarize the motivation for getting these results, and the m ...
... components and orbital characteristics whose study should be possible with present groundbased interferometers. All eight of the binary systems have had their mass ratio and the masses of their components estimated. The following comments summarize the motivation for getting these results, and the m ...
Communications in Asteroseismology
... When he expressed an interest in astronomy, I volunteered to take him to the Royal Observatory. I rode on the back of Mike’s Vespa scooter, introduced him to Dick Stoy and David Evans, and the rest is history!” Mike was impressed particularly with Stoy, who was then the director of the observatory. ...
... When he expressed an interest in astronomy, I volunteered to take him to the Royal Observatory. I rode on the back of Mike’s Vespa scooter, introduced him to Dick Stoy and David Evans, and the rest is history!” Mike was impressed particularly with Stoy, who was then the director of the observatory. ...
from z=0 to z=1
... 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0. ...
... 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0. ...
Where stars form: inside-out growth and coherent star formation from
... for a large sample of galaxies. An ideal dataset would also contain broadband optical imaging with the same high spatial resolution to allow for robust comparison of the spatial distribution of ionized gas and stellar continuum emission. This has now become possible with the WFC3 grism capability on ...
... for a large sample of galaxies. An ideal dataset would also contain broadband optical imaging with the same high spatial resolution to allow for robust comparison of the spatial distribution of ionized gas and stellar continuum emission. This has now become possible with the WFC3 grism capability on ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.