Astronomy 113 Laboratory Manual - UW
... It was Polaris that guided sailors around the globe, and not only by showing the way North. Using a sextant a European captain sailing to the New World could also accurately find the ship's latitude on any clear night by observing Polaris. While it is seldom still needed today, Polaris remains ever ...
... It was Polaris that guided sailors around the globe, and not only by showing the way North. Using a sextant a European captain sailing to the New World could also accurately find the ship's latitude on any clear night by observing Polaris. While it is seldom still needed today, Polaris remains ever ...
Tycho Brahe
... Scholastic dogma of the invariability of the heavens. The terms nova and supernova, which respectively refer to a “new” star and an extremely bright star, are misleading. These stars are not new, they are ancient and as far as brightness is concern, this is only relative to other stars. Around this ...
... Scholastic dogma of the invariability of the heavens. The terms nova and supernova, which respectively refer to a “new” star and an extremely bright star, are misleading. These stars are not new, they are ancient and as far as brightness is concern, this is only relative to other stars. Around this ...
Reassessing the formation of the inner Oort cloud
... either a Hernquist or Plummer potential – and chose other parameters based on the latest observations of embedded clusters from the literature. These other parameters result in the stars being on radial orbits and the cluster collapses. Similar to previous studies, in our simulations the inner Oort ...
... either a Hernquist or Plummer potential – and chose other parameters based on the latest observations of embedded clusters from the literature. These other parameters result in the stars being on radial orbits and the cluster collapses. Similar to previous studies, in our simulations the inner Oort ...
103-122
... An assumption that the intrinsic scatter in [α /Fe] for halo stars is small is not necessarily compatible with the theories of Galactic chemical evolution. If the αelements and the iron-group are synthesized in different stars, and gas clouds in the early Galaxy were poorly mixed, one may expect, as ...
... An assumption that the intrinsic scatter in [α /Fe] for halo stars is small is not necessarily compatible with the theories of Galactic chemical evolution. If the αelements and the iron-group are synthesized in different stars, and gas clouds in the early Galaxy were poorly mixed, one may expect, as ...
Astronomy 140 Lecture Notes, Spring 2008 c
... 0th magnitude flux F◦ is quite difficult, since it requires the comparison of a star with a laboratory standard light source. Stars are much fainter and hotter than lab standards, and are also much further away and observed through the atmosphere. Correcting for all these problems still leaves an un ...
... 0th magnitude flux F◦ is quite difficult, since it requires the comparison of a star with a laboratory standard light source. Stars are much fainter and hotter than lab standards, and are also much further away and observed through the atmosphere. Correcting for all these problems still leaves an un ...
The Paranatellonta in ancient Greek astrological literature
... semainousin), taken from one of his seven books he wrote19, according the Arab M ā-š ā -Allāh ibn Atharī (VII sec.). From Antiochus as from other poets were carried out several extensive prose paraphrases: and this one Porphirius used. Even if we do not want to leave a period of time - for Antiochus ...
... semainousin), taken from one of his seven books he wrote19, according the Arab M ā-š ā -Allāh ibn Atharī (VII sec.). From Antiochus as from other poets were carried out several extensive prose paraphrases: and this one Porphirius used. Even if we do not want to leave a period of time - for Antiochus ...
Spitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper
... with masses ranging from ∼0.1 to 20 M⊙ , Carpenter et al. (2006) find only 35 stars with emission in excess of photospheric values at 8 or 16 µm. The low-mass (0.1–1.2 M⊙ ) stars are associated with excess emission that is characteristic of optically thick disks found around classical T Tauri stars. ...
... with masses ranging from ∼0.1 to 20 M⊙ , Carpenter et al. (2006) find only 35 stars with emission in excess of photospheric values at 8 or 16 µm. The low-mass (0.1–1.2 M⊙ ) stars are associated with excess emission that is characteristic of optically thick disks found around classical T Tauri stars. ...
Correcting Systematic Poalrization Effects in Keck LRISp
... We describe here several methods to overcome instrumental error sources that are required to achieve these high SNRs on LRISp. We explore high SNR techniques such as defocusing and slit-stepping during integration with high spectral and spatial oversampling. We find that the instrument flexure and i ...
... We describe here several methods to overcome instrumental error sources that are required to achieve these high SNRs on LRISp. We explore high SNR techniques such as defocusing and slit-stepping during integration with high spectral and spatial oversampling. We find that the instrument flexure and i ...
INTRODUCTION TO CELESTIAL NAVIGATION
... With a sundial to tell us local noon, and the equation of time to tell us the difference between solar and mean noon, a simple clock could always be reset daily. We think we know what we mean when we speak of time, but how to measure it? If we use the Earth as a clock, we could set up a fixed telesc ...
... With a sundial to tell us local noon, and the equation of time to tell us the difference between solar and mean noon, a simple clock could always be reset daily. We think we know what we mean when we speak of time, but how to measure it? If we use the Earth as a clock, we could set up a fixed telesc ...
The Swift satellite lives up to its name, revealing cosmic
... prompt phase the canonical afterglow decays very steeply before flattening out to what is known as a plateau phase. The light curve then breaks to the steeper decay rate known from pre-Swift data and may steepen again at a day or so after the GRB began indicating the sideways spreading of the jet as ...
... prompt phase the canonical afterglow decays very steeply before flattening out to what is known as a plateau phase. The light curve then breaks to the steeper decay rate known from pre-Swift data and may steepen again at a day or so after the GRB began indicating the sideways spreading of the jet as ...
April 2016 - Central Arkansas Astronomical Society
... one‐half the speed of light and form a single more massive detected gravita onal waves were produced during the final black hole, conver ng a por on of the combined black holes' frac on of a second of the merger of two black holes to mass to energy, according to Einstein's formula E=mc2. This produce ...
... one‐half the speed of light and form a single more massive detected gravita onal waves were produced during the final black hole, conver ng a por on of the combined black holes' frac on of a second of the merger of two black holes to mass to energy, according to Einstein's formula E=mc2. This produce ...
Direct Imaging of Exoplanets - American Museum of Natural History
... β Pic is north, not northwest, so the planet is co-moving, and not a background object. The planet age is ~12 m.y., much younger than the HR 8799 or Fomalhaut planets. The mass is ~9 MJup, and the semimajor axis in the 8–15 AU range, with a period as short as 17 years. The star is at 19 pc, and the ...
... β Pic is north, not northwest, so the planet is co-moving, and not a background object. The planet age is ~12 m.y., much younger than the HR 8799 or Fomalhaut planets. The mass is ~9 MJup, and the semimajor axis in the 8–15 AU range, with a period as short as 17 years. The star is at 19 pc, and the ...
Variations in Integrated Galactic Initial Mass Functions due to
... Recently, Recchi et al. (2009) investigated the [α/Fe] versus velocity disper142 ...
... Recently, Recchi et al. (2009) investigated the [α/Fe] versus velocity disper142 ...
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. ...
ESA BR-170 - ESA Science
... This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what would more detailed observations reveal? In 1969 the first catalogue of infrared-bright objects was published, including thousands of intriguing objects never seen bef ...
... This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what would more detailed observations reveal? In 1969 the first catalogue of infrared-bright objects was published, including thousands of intriguing objects never seen bef ...
Preliminary Talk Abstract Book - MoCA
... Clusters of galaxies are the most massive virialised cosmic structures. The diversity of their environmental conditions, from the dense cores to the sparse outskirts, allows them to be used as observational laboratories for the study of the environmental drivers of galaxy evolution. Furthermore, the ...
... Clusters of galaxies are the most massive virialised cosmic structures. The diversity of their environmental conditions, from the dense cores to the sparse outskirts, allows them to be used as observational laboratories for the study of the environmental drivers of galaxy evolution. Furthermore, the ...
Missions
... This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what would more detailed observations reveal? In 1969 the first catalogue of infrared-bright objects was published, including thousands of intriguing objects never seen bef ...
... This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what would more detailed observations reveal? In 1969 the first catalogue of infrared-bright objects was published, including thousands of intriguing objects never seen bef ...
Introduction_to_pulsar_astronomy
... Russel Hulse and Joe Taylor discovered PSR B1913+16, in the constellation Aquila (the Eagle), during a systematic 430-MHz survey of the Galactic plane at Arecibo. ...
... Russel Hulse and Joe Taylor discovered PSR B1913+16, in the constellation Aquila (the Eagle), during a systematic 430-MHz survey of the Galactic plane at Arecibo. ...
On the Spiral Structure of the Milky Way Galaxy
... instability due to regular magnetic field directed along the arm. Observational indications for this assumption were recently found in the north-western fragment of the S4 spiral arm in the Andromeda galaxy, just the arm with regular wave-shaped magnetic field along it detected long ago [see 7, 8]. ...
... instability due to regular magnetic field directed along the arm. Observational indications for this assumption were recently found in the north-western fragment of the S4 spiral arm in the Andromeda galaxy, just the arm with regular wave-shaped magnetic field along it detected long ago [see 7, 8]. ...
A S T R O N O M Y 1 1 0 - the Home Page for Voyager2.DVC.edu.
... are doing the computation by hand, because it is easy to compute the powers of 10 and estimate the rest. In the computation about, the 3x7 part could be estimated as 21. That would not be final answer, but it would give a rough idea of the result. Solving Equations Often we have a formula where we k ...
... are doing the computation by hand, because it is easy to compute the powers of 10 and estimate the rest. In the computation about, the 3x7 part could be estimated as 21. That would not be final answer, but it would give a rough idea of the result. Solving Equations Often we have a formula where we k ...
A Determination of the Deflection of Light by the Sun`s Gravitational
... (Observers,Dr. A. C. I). CROMMELINand Mr. C. DAVIDSON.) 9. Sobral is the second town of the State of Ceara, in the north of Brazil. Its geographicalco-ordinates are: longitude 2h. 47m. 25s. west; latitude 30 41' 33"south; altitude 230 feet. Its climate is dry and though hot not unhealthy. The expedi ...
... (Observers,Dr. A. C. I). CROMMELINand Mr. C. DAVIDSON.) 9. Sobral is the second town of the State of Ceara, in the north of Brazil. Its geographicalco-ordinates are: longitude 2h. 47m. 25s. west; latitude 30 41' 33"south; altitude 230 feet. Its climate is dry and though hot not unhealthy. The expedi ...
Observational evidence for AGN feedback in early
... primarily in the likelihood of the surface-brightness profile resembling a de Vaucouleurs law and a high concentration index. This is a very efficient way of selecting large numbers of spheroids, but can fail to reject spiral galaxies with prominent bulges. In particular, spirals with face-on faint ...
... primarily in the likelihood of the surface-brightness profile resembling a de Vaucouleurs law and a high concentration index. This is a very efficient way of selecting large numbers of spheroids, but can fail to reject spiral galaxies with prominent bulges. In particular, spirals with face-on faint ...
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.