Sparse aperture masking at the VLT II. Detection limits for the eight
... a debris disk, a proto-planetary disk or a planetary system. The understanding of such formation process requires the study of debris disks. These targets are substantial and particularly suitable for optical and infrared observations. Sparse Aperture masking (SAM) is a high angular resolution techn ...
... a debris disk, a proto-planetary disk or a planetary system. The understanding of such formation process requires the study of debris disks. These targets are substantial and particularly suitable for optical and infrared observations. Sparse Aperture masking (SAM) is a high angular resolution techn ...
GRAVITY: Observing the Universe in Motion
... with the Very Large Telescope Interferometer (VLTI) substantially. An overview of the key experiments that will become possible with GRAVITY is illustrated on the Telescopes and Instrumentation section page (p. 6, lower panel). A unique combination with the VLTI The VLTI is the largest array of 8-me ...
... with the Very Large Telescope Interferometer (VLTI) substantially. An overview of the key experiments that will become possible with GRAVITY is illustrated on the Telescopes and Instrumentation section page (p. 6, lower panel). A unique combination with the VLTI The VLTI is the largest array of 8-me ...
flyer
... these objects exist ever since they were first observed as pulsars. They are the collapsed cores of massive stars that have run out of fuel and undergone a supernova explosion. With a mass of slightly more than the Sun's (∼2.8×1030 kg) packed into a sphere of radius ∼10 km, neutron stars are about 4 ...
... these objects exist ever since they were first observed as pulsars. They are the collapsed cores of massive stars that have run out of fuel and undergone a supernova explosion. With a mass of slightly more than the Sun's (∼2.8×1030 kg) packed into a sphere of radius ∼10 km, neutron stars are about 4 ...
Chapter15- Our Galaxy-pptx - SFA Physics and Astronomy
... The Milky Way Galaxy appears in our sky as a faint band of light. © 2015 Pearson Education, Inc. ...
... The Milky Way Galaxy appears in our sky as a faint band of light. © 2015 Pearson Education, Inc. ...
2.4 Statistical properties of radial velocity planets
... therefore better suited to detect multiple planets in a system. On the other hand a giant planet search program which surveys a large number of stars but only with a restricted number of measurements per star, say 20, is more successful in detecting only the most prominent planet in a system. Multip ...
... therefore better suited to detect multiple planets in a system. On the other hand a giant planet search program which surveys a large number of stars but only with a restricted number of measurements per star, say 20, is more successful in detecting only the most prominent planet in a system. Multip ...
Indications for an influence of Hot Jupiters
... testing for tidal or magnetic interaction effects in samples of planet-hosting stars is difficult because stellar activity hinders exoplanet detection, so that stellar samples with detected exoplanets show a bias towards low activity for small exoplanets. Aims. We aim to test if exoplanets in close ...
... testing for tidal or magnetic interaction effects in samples of planet-hosting stars is difficult because stellar activity hinders exoplanet detection, so that stellar samples with detected exoplanets show a bias towards low activity for small exoplanets. Aims. We aim to test if exoplanets in close ...
Measuring distances to the edge of the local group
... Scientific Justification Be sure to include overall significance to astronomy. For standard proposals limit text to one page with figures, captions and references on no more than two additional pages. We propose to measure the distance to the nearby dwarf irregular galaxies Sextans A, B, and NGC 310 ...
... Scientific Justification Be sure to include overall significance to astronomy. For standard proposals limit text to one page with figures, captions and references on no more than two additional pages. We propose to measure the distance to the nearby dwarf irregular galaxies Sextans A, B, and NGC 310 ...
Testing - uwyo.edu
... that formed the first stars had to be considerably warmer than today’s molecular clouds. • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure. © 2010 Pearson Education, Inc. ...
... that formed the first stars had to be considerably warmer than today’s molecular clouds. • The first stars must therefore have been more massive than most of today’s stars, for gravity to overcome pressure. © 2010 Pearson Education, Inc. ...
Beyond simple depletion: phase behaviour of colloid–star polymer
... In this paper, we report experiments that go systematically beyond the idealized model: the nearly ideal linear polymer is replaced by star-branched polymers of increasing functionality (number of arms). To simplify the terminology, we will refer to the model system and the more complex systems just ...
... In this paper, we report experiments that go systematically beyond the idealized model: the nearly ideal linear polymer is replaced by star-branched polymers of increasing functionality (number of arms). To simplify the terminology, we will refer to the model system and the more complex systems just ...
FIELD ASTRONOMY
... The solar day, or the time corresponding to one rotation of the earth with respect to the direction of the sun, is the most natural unit of time for ordinary purposes. If time was regulated by stars, sidereal noon would occur at night during half the year. For obvious reasons, this would not be a sa ...
... The solar day, or the time corresponding to one rotation of the earth with respect to the direction of the sun, is the most natural unit of time for ordinary purposes. If time was regulated by stars, sidereal noon would occur at night during half the year. For obvious reasons, this would not be a sa ...
Survey of Astrophysics A110 The Milky Way Galaxy
... 3. Found in the Galactic disk. 4. Spectral analysis shows that they have chemical compositions like the Sun (Population I type stars). – 5. They have long main sequences on the HR diagram which indicate that they are young (e.g., many contain young hot O and B type Population I stars). ...
... 3. Found in the Galactic disk. 4. Spectral analysis shows that they have chemical compositions like the Sun (Population I type stars). – 5. They have long main sequences on the HR diagram which indicate that they are young (e.g., many contain young hot O and B type Population I stars). ...
Neutrinos and Supernovae
... But there is one exception They occur on average to the neutrino’s demure only once every 50 years role. It occurs in the heart of or so within a given massive stars, deep within galaxy. The inhabitants of the stellar core. When a masthe northern hemisphere sive star dies, it does not go have not be ...
... But there is one exception They occur on average to the neutrino’s demure only once every 50 years role. It occurs in the heart of or so within a given massive stars, deep within galaxy. The inhabitants of the stellar core. When a masthe northern hemisphere sive star dies, it does not go have not be ...
Mass loss of massive stars near the Eddington luminosity by core
... One of the characteristics of massive stars shortly before the explosion is their huge neutrino luminosities. Neutrinos are constantly emitted from the stellar core throughout the evolution because of the nuclear reactions. However, after the onset of the carbon burning, the thermal neutrino emissio ...
... One of the characteristics of massive stars shortly before the explosion is their huge neutrino luminosities. Neutrinos are constantly emitted from the stellar core throughout the evolution because of the nuclear reactions. However, after the onset of the carbon burning, the thermal neutrino emissio ...
Nucleosynthesis and Chemical Evolution of Oxygen
... Galactic chemical evolution is the primary versus secondary nature of the different isotopes. 16O is a primary isotope, that is, an isotope that can be synthesized in a star initially composed only of hydrogen, while 17O and 18O are secondary isotopes, which means their formation requires pre-existi ...
... Galactic chemical evolution is the primary versus secondary nature of the different isotopes. 16O is a primary isotope, that is, an isotope that can be synthesized in a star initially composed only of hydrogen, while 17O and 18O are secondary isotopes, which means their formation requires pre-existi ...
Are planetary systems flat?
... • orbital period P = 5.2 days • two curious features: • sinusoidal brightness variations at fundamental and first harmonic • transit (U shape) is shallower than occultation (square well) • both can be explained if the companion is a white dwarf rather than a planet: • occultation is deeper because t ...
... • orbital period P = 5.2 days • two curious features: • sinusoidal brightness variations at fundamental and first harmonic • transit (U shape) is shallower than occultation (square well) • both can be explained if the companion is a white dwarf rather than a planet: • occultation is deeper because t ...
Program and Abstract Book - European Southern Observatory
... are among the current open questions in this research area. ...
... are among the current open questions in this research area. ...
ROTATION CURVES OF HIGH-LUMINOSITY SPIRAL GALAXIES
... to distances as great as r=49 kpc. This implies a significant mass at large r. Rotational velocities increase about 20 km/s across a spiral arm, as predicted by the density wave theory. By analogy, it is sug gested that our Galaxy has a flat rotation curve out to r^60 k p C j with V ^ constant at n ...
... to distances as great as r=49 kpc. This implies a significant mass at large r. Rotational velocities increase about 20 km/s across a spiral arm, as predicted by the density wave theory. By analogy, it is sug gested that our Galaxy has a flat rotation curve out to r^60 k p C j with V ^ constant at n ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... stellar distributions which suggests that passive evolution of the stellar population could result in morphological evolution from one dwarf classification to the other (e.g., Lin & Faber 1983; Kormendy 1985; Davies & Phillipps 1988). In fact, many of the key morphological differences between dwarf ...
... stellar distributions which suggests that passive evolution of the stellar population could result in morphological evolution from one dwarf classification to the other (e.g., Lin & Faber 1983; Kormendy 1985; Davies & Phillipps 1988). In fact, many of the key morphological differences between dwarf ...
Metal-poor Stars
... at the tail of the MDF is extremely sparsely populated (Figure 2). All those stars are fainter, and hence further away, than those among which Bond was searching (B = 10.5 to 11.5). As will be shown in this review, the current lowest metallicity has well surpassed [Fe/H] ∼ −3.0 although it is still ...
... at the tail of the MDF is extremely sparsely populated (Figure 2). All those stars are fainter, and hence further away, than those among which Bond was searching (B = 10.5 to 11.5). As will be shown in this review, the current lowest metallicity has well surpassed [Fe/H] ∼ −3.0 although it is still ...
Starlight Natal Report
... Bull, thereby having power over the waters or blood of life, and thus it can symbolise a great and terrible weapon. This is a potentially destructive skill that can be used to destroy or used to give life. With El Nath making a contact in your chart, then at some level of your life there will be iss ...
... Bull, thereby having power over the waters or blood of life, and thus it can symbolise a great and terrible weapon. This is a potentially destructive skill that can be used to destroy or used to give life. With El Nath making a contact in your chart, then at some level of your life there will be iss ...
Chapter18.1
... • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more massive than 1.4MSun, the white dwarf limit (or Chandrasekhar limit). © 2010 Pearson Education, Inc. ...
... • As a white dwarf’s mass approaches 1.4MSun, its electrons must move at nearly the speed of light. • Because nothing can move faster than light, a white dwarf cannot be more massive than 1.4MSun, the white dwarf limit (or Chandrasekhar limit). © 2010 Pearson Education, Inc. ...
Nebulae.The Lagoon and Dumbbell Nebulae
... a remnant of a dying star which is approximately 2 times smaller than the Sun. The star is hot and blue with temperature of 85000K (Most of these stars usually turn into red giants. They lose their mass by ejection of the outer gas layers. These layers expand in space, forming a temporary wrap aroun ...
... a remnant of a dying star which is approximately 2 times smaller than the Sun. The star is hot and blue with temperature of 85000K (Most of these stars usually turn into red giants. They lose their mass by ejection of the outer gas layers. These layers expand in space, forming a temporary wrap aroun ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.