ASTRONOMY AND ASTROPHYSICS (ASTRO)
... ASTRO 125L: The Sky and the Solar System Laboratory (0-2) Cr. 1. F.S. Prereq: Concurrent or previous enrollment in ASTRO 120 Laboratory course to accompany Astro 120. Students carry out practical exercises involving naked eye and telescopic observing to explore and reinforce ideas covered in Astro 1 ...
... ASTRO 125L: The Sky and the Solar System Laboratory (0-2) Cr. 1. F.S. Prereq: Concurrent or previous enrollment in ASTRO 120 Laboratory course to accompany Astro 120. Students carry out practical exercises involving naked eye and telescopic observing to explore and reinforce ideas covered in Astro 1 ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... Moutou et al. 2015). An example of a Jupiter-analog planet orbiting a solar twin is presented in Bedell et al. (2015). While the Kepler mission has revolutionized exoplanetary science and provided a first estimate of the frequency of Earth-size planets in Earth-like orbits, long-term RV surveys compl ...
... Moutou et al. 2015). An example of a Jupiter-analog planet orbiting a solar twin is presented in Bedell et al. (2015). While the Kepler mission has revolutionized exoplanetary science and provided a first estimate of the frequency of Earth-size planets in Earth-like orbits, long-term RV surveys compl ...
10-Jets and outflows
... the youngest stars in star formation regions. Originally, these were mainly associated with high mass stars. The outflows were found to be split into two lobes, one on each side of the young stellar object. Most significantly, the material on one side was found to be predominantly blue shifted and o ...
... the youngest stars in star formation regions. Originally, these were mainly associated with high mass stars. The outflows were found to be split into two lobes, one on each side of the young stellar object. Most significantly, the material on one side was found to be predominantly blue shifted and o ...
Turbulence-driven Polar Winds from T Tauri Stars Energized by
... What sets the Sun’s mass loss? • Coronal heating must be ultimately responsible for the solar wind. • A fraction of the “coronal heating” is channeled downward by conduction. • Hammer (1982) & Withbroe (1988) suggested a balance between conduction (downward), enthalpy (upward), and radiation losses ...
... What sets the Sun’s mass loss? • Coronal heating must be ultimately responsible for the solar wind. • A fraction of the “coronal heating” is channeled downward by conduction. • Hammer (1982) & Withbroe (1988) suggested a balance between conduction (downward), enthalpy (upward), and radiation losses ...
Chapter 20 Notes
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. ...
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. ...
arXiv:astro-ph/9701131v1 18 Jan 1997
... quietly fade from prominence as helium white dwarfs. This general evolutionary scenario is detailed in Figure 1 (adapted from Laughlin et al., 1996), which charts the path in the Hertzsprung-Russell diagram followed by low mass stars of several different masses in the range 0.08M⊙ ≤ M∗ ≤ 0.25M⊙. Upo ...
... quietly fade from prominence as helium white dwarfs. This general evolutionary scenario is detailed in Figure 1 (adapted from Laughlin et al., 1996), which charts the path in the Hertzsprung-Russell diagram followed by low mass stars of several different masses in the range 0.08M⊙ ≤ M∗ ≤ 0.25M⊙. Upo ...
A Revised DDO Abundance Calibration for Population I Red Giants
... The DDO photometric data were taken from several papers, mainly by McClure (1976), Dean (1981), Hartkopf & Yoss (1982). and Norris et al. (1985), whilst the (R-I) indices come essentially from Taylor (1986), Cousins (1980), and Norris et al. (1985). The abundance information was mainly taken from Ca ...
... The DDO photometric data were taken from several papers, mainly by McClure (1976), Dean (1981), Hartkopf & Yoss (1982). and Norris et al. (1985), whilst the (R-I) indices come essentially from Taylor (1986), Cousins (1980), and Norris et al. (1985). The abundance information was mainly taken from Ca ...
PH607lec08
... signatures of major mergers involving one or more dynamically cold disk galaxies (Schweizer 1987). ...
... signatures of major mergers involving one or more dynamically cold disk galaxies (Schweizer 1987). ...
Article PDF - IOPscience
... indicators, the white dwarf population sampled must be as close as possible to being statistically complete. The white dwarf population is composed mainly of lowluminosity stars that are rather difficult to study as we move further away from the Sun. Candidates are mainly discovered from either prop ...
... indicators, the white dwarf population sampled must be as close as possible to being statistically complete. The white dwarf population is composed mainly of lowluminosity stars that are rather difficult to study as we move further away from the Sun. Candidates are mainly discovered from either prop ...
The science case for - Astrophysics
... stretching space-time, accelerating the expansion of the Universe. The nature of this force, which controls the future of the Universe, remains quite unknown. Astronomy is a technology-enabled science: progress in astronomy demands new technologies and new facilities. Astronomical telescopes and ass ...
... stretching space-time, accelerating the expansion of the Universe. The nature of this force, which controls the future of the Universe, remains quite unknown. Astronomy is a technology-enabled science: progress in astronomy demands new technologies and new facilities. Astronomical telescopes and ass ...
Article PDF - IOPscience
... height at both AMOR and Arecibo. On the other hand, radar data from Jodrell Bank and from Ottawa show that radar meteoroids detected by those systems also ablate at heights near 95 km (McKinley 1961), despite the fact that they have line densities q 1014 cm1, 6 orders of magnitude larger than the ...
... height at both AMOR and Arecibo. On the other hand, radar data from Jodrell Bank and from Ottawa show that radar meteoroids detected by those systems also ablate at heights near 95 km (McKinley 1961), despite the fact that they have line densities q 1014 cm1, 6 orders of magnitude larger than the ...
Superbubble Activity in Star-Forming Galaxies M. S. Oey
... emission has been detected within many objects, which is qualitatively consistent with the adiabatic evolution model. Two classes of X-ray emission have been identified: objects with X-ray luminosity Lx in excess of the model’s prediction (Chu & Mac Low 1990; Wang & Helfand 1991), and objects that r ...
... emission has been detected within many objects, which is qualitatively consistent with the adiabatic evolution model. Two classes of X-ray emission have been identified: objects with X-ray luminosity Lx in excess of the model’s prediction (Chu & Mac Low 1990; Wang & Helfand 1991), and objects that r ...
Stellar Evolution Nucleosynthesis
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements. (The sun is massive enough to fuse some He with C to make oxygen, but most of the C and O will be trapped forever in the white dwarf). • Degeneracy pressure supports ...
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements. (The sun is massive enough to fuse some He with C to make oxygen, but most of the C and O will be trapped forever in the white dwarf). • Degeneracy pressure supports ...
21_Testbank
... 21.3 Short Answer Questions 1) Give examples demonstrating the role of "nature" and "nurture" in galaxy evolution. Answer: Galaxies come in a wide variety of shapes and sizes. Protogalactic clouds that had low angular momentum may have formed spheroidal stellar systems (elliptical galaxies), while ...
... 21.3 Short Answer Questions 1) Give examples demonstrating the role of "nature" and "nurture" in galaxy evolution. Answer: Galaxies come in a wide variety of shapes and sizes. Protogalactic clouds that had low angular momentum may have formed spheroidal stellar systems (elliptical galaxies), while ...
here - Ira-Inaf
... The far infrared emissivity of the dust in the interstellar medium of the far outer Galaxy is smaller, and the pressure of the intercloud medium is much smaller (Brand and Wouterloot, 1996). Although these factors might be expected to negatively influence the cloud- and star-formation activity in th ...
... The far infrared emissivity of the dust in the interstellar medium of the far outer Galaxy is smaller, and the pressure of the intercloud medium is much smaller (Brand and Wouterloot, 1996). Although these factors might be expected to negatively influence the cloud- and star-formation activity in th ...
The chemical composition of solar-type stars and its impact on the
... period of time. One of these ideas is the trace a planet will leave in the composition of its host star: since both planet and host are formed from the same material and the composition of a planet can be very different from that of its host star, a planet host might look different in terms of eleme ...
... period of time. One of these ideas is the trace a planet will leave in the composition of its host star: since both planet and host are formed from the same material and the composition of a planet can be very different from that of its host star, a planet host might look different in terms of eleme ...
Tycho Brahe
... he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
... he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.