Project Description - SDSS-III
... into dark-time (moonless) and bright-time surveys. The main dark-time survey, which takes five years, is a precision measurement of the cosmic distance scale and the effects of dark energy (BOSS). The first year of dark time will be devoted to a spectroscopic study of the structure and chemical evol ...
... into dark-time (moonless) and bright-time surveys. The main dark-time survey, which takes five years, is a precision measurement of the cosmic distance scale and the effects of dark energy (BOSS). The first year of dark time will be devoted to a spectroscopic study of the structure and chemical evol ...
Chapter 15 Stars, Galaxies and Universe
... • The apparent magnitude is the brightness of a star as seen from Earth. The absolute magnitude is the brightness that a star would have at a distance of 32.6 light-years from Earth. • If all stars were the same distance away, their absolute magnitudes would be the same as their apparent magnitudes. ...
... • The apparent magnitude is the brightness of a star as seen from Earth. The absolute magnitude is the brightness that a star would have at a distance of 32.6 light-years from Earth. • If all stars were the same distance away, their absolute magnitudes would be the same as their apparent magnitudes. ...
X-ray sources in the starburst spiral galaxy M 83
... of the galaxy. A point source with Lx ≈ 3 × 1038 erg s−1 in the 0.3–8.0 keV band is found to coincide with the infra-red nuclear photometric peak, one of the two dynamical nuclei of the galaxy. No point-like sources are resolved (at a 2.5-σ level) at the centre of symmetry of the outer optical isoph ...
... of the galaxy. A point source with Lx ≈ 3 × 1038 erg s−1 in the 0.3–8.0 keV band is found to coincide with the infra-red nuclear photometric peak, one of the two dynamical nuclei of the galaxy. No point-like sources are resolved (at a 2.5-σ level) at the centre of symmetry of the outer optical isoph ...
EROs and submm galaxies: Expectations for FMOS in the
... K20 galaxies have R-K>5 and the average colour is R-K=5.2. ...
... K20 galaxies have R-K>5 and the average colour is R-K=5.2. ...
T3-Cosmic Star Formation History
... global history of star formation and heavy element production of the Universe, independently of the complex evolutionary phases of individual galaxy subpopulations. The modern version of this technique relies on some basic properties of stellar populations and dusty starburst galaxies: 1. The UV-con ...
... global history of star formation and heavy element production of the Universe, independently of the complex evolutionary phases of individual galaxy subpopulations. The modern version of this technique relies on some basic properties of stellar populations and dusty starburst galaxies: 1. The UV-con ...
The isotopic mixture of barium in the metal-poor
... Next, we fit the profile of the Ba II 4554 Å line by changing the barium abundance, and f odd . Our ultra-high resolution spectra can easily distinguish the effects of the two parameters; at the metallicity of HD 140283, the equivalent width is almost independent of f odd . We found that a linear r ...
... Next, we fit the profile of the Ba II 4554 Å line by changing the barium abundance, and f odd . Our ultra-high resolution spectra can easily distinguish the effects of the two parameters; at the metallicity of HD 140283, the equivalent width is almost independent of f odd . We found that a linear r ...
The old globular cluster system of the dIrr galaxy NGC 1427A in the
... sky images were cleaned from all detected sources with a SExtractor object map, and object residuals were manually replaced with nearby empty sky patches. Then, these cleaned sky images were subtracted from the associated object exposures to obtain a background corrected science frame. Before combin ...
... sky images were cleaned from all detected sources with a SExtractor object map, and object residuals were manually replaced with nearby empty sky patches. Then, these cleaned sky images were subtracted from the associated object exposures to obtain a background corrected science frame. Before combin ...
– 1 – 1. Galaxy Observations 1.1.
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
... rate affecting the UV continuum, and the calibration for UV stellar photospheric features or UV ISM absorption to metallicity is not well understood at present (see Erb 2010 for details). So the best approach is to move into the near-IR, where the normal optical low redshift techniques and calibrati ...
Michell, Laplace and the Origin of the Black Hole Concept
... Sun spin the seven planets in almost circular orbits. However, Laplace did not consider comets to be part of the Solar System as some travelled in highly eccentric orbits, and while they moved into the Sun’s domain they also moved far beyond the planetary sphere. ...
... Sun spin the seven planets in almost circular orbits. However, Laplace did not consider comets to be part of the Solar System as some travelled in highly eccentric orbits, and while they moved into the Sun’s domain they also moved far beyond the planetary sphere. ...
High ions towards white dwarfs: circumstellar line shifts and stellar
... in DA white dwarf UV spectra should be identifiable by an accurate measurement of their interstellar, photospheric and circumstellar velocities (Vism , Vphot and Vcirc ). This is especially true for nearby targets where the interstellar sight-lines have a simple absorption structure (i.e. few interv ...
... in DA white dwarf UV spectra should be identifiable by an accurate measurement of their interstellar, photospheric and circumstellar velocities (Vism , Vphot and Vcirc ). This is especially true for nearby targets where the interstellar sight-lines have a simple absorption structure (i.e. few interv ...
GALAXIES 626
... The bulge is not a dominant feature of our Galaxy - only about 25% of the light. The bulge is probably an evolutionary structure of the disk, rather than a feature of galaxy formation in the early universe. Structure and kinematics are well represented by the product of disk instability. The α-enhan ...
... The bulge is not a dominant feature of our Galaxy - only about 25% of the light. The bulge is probably an evolutionary structure of the disk, rather than a feature of galaxy formation in the early universe. Structure and kinematics are well represented by the product of disk instability. The α-enhan ...
IAC_L2_thindisk
... the disk, e.g. via Jeans equation. Is there more matter in the disk that we can account for from census of visible objects ? The tracer sample must be in equilibrium so the stars need to be older than a few Gyr. The last few estimates have used K dwarfs and K giants - probably OK but they do include ...
... the disk, e.g. via Jeans equation. Is there more matter in the disk that we can account for from census of visible objects ? The tracer sample must be in equilibrium so the stars need to be older than a few Gyr. The last few estimates have used K dwarfs and K giants - probably OK but they do include ...
nexstar_gt_60,80114.. - Downloads
... the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have ...
... the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have ...
FLARE SWG theme 3: high
... Eddington limit: the challenge in quickly growing to MBH>109 solar Eddington limited growth time: ...
... Eddington limit: the challenge in quickly growing to MBH>109 solar Eddington limited growth time: ...
ancient cultures 114 - Stellenbosch University
... The earliest texts indicating Babylonian interest in celestial bodies dates to approximately 1700 BCE (Bienkowski & Millard 2000: 40). The interest during this time, however, seems to be purely astrological; the texts all being what are known as “omen” texts. A standard series of these omen texts wa ...
... The earliest texts indicating Babylonian interest in celestial bodies dates to approximately 1700 BCE (Bienkowski & Millard 2000: 40). The interest during this time, however, seems to be purely astrological; the texts all being what are known as “omen” texts. A standard series of these omen texts wa ...
Document
... • Energetic argument: the release of isotropic energy in the form of gamma-rays is a real theoretical nightmare • Evidence of jet-like emission in the optical afterglow lightcurve (but not so widespread): ...
... • Energetic argument: the release of isotropic energy in the form of gamma-rays is a real theoretical nightmare • Evidence of jet-like emission in the optical afterglow lightcurve (but not so widespread): ...
SUB-KILOPARSEC IMAGING OF COOL MOLECULAR GAS IN
... these galaxies in low-J CO (either CO(1–0) or CO(2–1)). In this paper, we present high-resolution observations of low-J CO emission in two DSFGs from the SPT sample performed with the Australia Telescope Compact Array (ATCA). Both objects have been observed at comparable (∼0.5”) resolution by ALMA a ...
... these galaxies in low-J CO (either CO(1–0) or CO(2–1)). In this paper, we present high-resolution observations of low-J CO emission in two DSFGs from the SPT sample performed with the Australia Telescope Compact Array (ATCA). Both objects have been observed at comparable (∼0.5”) resolution by ALMA a ...
OBSERVATIONS OF DISINTEGRATING, EVAPORATING AND HOT
... or a temperature inversion (increasing with altitude). For typical gases in exoplanet atmospheres, the altitude variation between wavelengths that are relatively opaque and transparent is about L ≈ 5 H Burrows & Orton (2009). Plugging this into equation 1.2, the change in transit depth with wavelen ...
... or a temperature inversion (increasing with altitude). For typical gases in exoplanet atmospheres, the altitude variation between wavelengths that are relatively opaque and transparent is about L ≈ 5 H Burrows & Orton (2009). Plugging this into equation 1.2, the change in transit depth with wavelen ...
Master thesis
... N e in the stellar atmosphere, called the second dredge-up. These convective mixing transfers heavy materials from the core into the shells, that are later accelerated and blasted off as stellar wind. This wind enriches the interstellar medium with metals. On the contrary, also heavier materials pro ...
... N e in the stellar atmosphere, called the second dredge-up. These convective mixing transfers heavy materials from the core into the shells, that are later accelerated and blasted off as stellar wind. This wind enriches the interstellar medium with metals. On the contrary, also heavier materials pro ...
Stars: Stellar Evol & “death” Galaxies Astronomy 1 — Elementary Astronomy
... deduced that they were observing very rapidly rotating neutron stars -pulsars. ...
... deduced that they were observing very rapidly rotating neutron stars -pulsars. ...
A Budget and Accounting of Metals at z~ 0: Results from the COS
... for high-ionization gas and in Werk et al. (2013) for lowionization gas. Tumlinson et al. (2011) reported that the mass of oxygen traced by the highly ionized O VI in the CGM of star-forming galaxies is comparable to the mass of oxygen in their ISM. COS-Halos has specifically addressed the metal con ...
... for high-ionization gas and in Werk et al. (2013) for lowionization gas. Tumlinson et al. (2011) reported that the mass of oxygen traced by the highly ionized O VI in the CGM of star-forming galaxies is comparable to the mass of oxygen in their ISM. COS-Halos has specifically addressed the metal con ...
A Determination of the Deflection of Light by the Sun`s Gravitational
... African coast near Cape Palmas, passing through the Island of Principe, then across Africa to the western shores of Lake Tanganyika. Enquiry as to the suitable sites and probableweather conditions was kindly made by Mr.HINKS. It appearedthat a station in North Brazil, the Island of Principe, and a s ...
... African coast near Cape Palmas, passing through the Island of Principe, then across Africa to the western shores of Lake Tanganyika. Enquiry as to the suitable sites and probableweather conditions was kindly made by Mr.HINKS. It appearedthat a station in North Brazil, the Island of Principe, and a s ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.