The evolution of low-metallicity massive stars - Argelander
... Since the speed of light is a physical constant, the light that we see today when looking at far-away stars or galaxies must have been emitted in the past. This also means that the the more distant objects we observe, the older the version of the Universe we see (as illustrated by Fig. 1.1). This is ...
... Since the speed of light is a physical constant, the light that we see today when looking at far-away stars or galaxies must have been emitted in the past. This also means that the the more distant objects we observe, the older the version of the Universe we see (as illustrated by Fig. 1.1). This is ...
environmental effects on galaxy evolution in nearby clusters
... This work represents the end point of my student career. After approximately twenty one years from my first entrance in a class room (it was September 1984 in Phoenix, AZ), I’m finally going to attend my last ”school” examination. Therefore I want to seize this opportunity in order to briefly rememb ...
... This work represents the end point of my student career. After approximately twenty one years from my first entrance in a class room (it was September 1984 in Phoenix, AZ), I’m finally going to attend my last ”school” examination. Therefore I want to seize this opportunity in order to briefly rememb ...
The chemical composition of solar-type stars and its impact on the
... grown at a pace that was unimaginable in the early 1990s. Missions like Spitzer, Corot, and especially Kepler helped to increase the number of confirmed exoplanets to more than 8501 and over 2000 candidates. Naturally, the detection of terrestrial planets is of special interest, and indeed it looks ...
... grown at a pace that was unimaginable in the early 1990s. Missions like Spitzer, Corot, and especially Kepler helped to increase the number of confirmed exoplanets to more than 8501 and over 2000 candidates. Naturally, the detection of terrestrial planets is of special interest, and indeed it looks ...
Halley`s Comet Strikes Back!
... • Halley is a “short period” comet (orbital period less than 200 years) • There are over 500 short period comets documented. • There are over 120 known non-periodic comets. • We keep finding new ones. • It is not unusual to see 10 visual comets in a year. • There are currently about 80 known comets ...
... • Halley is a “short period” comet (orbital period less than 200 years) • There are over 500 short period comets documented. • There are over 120 known non-periodic comets. • We keep finding new ones. • It is not unusual to see 10 visual comets in a year. • There are currently about 80 known comets ...
The redshift of extragalactic nebulae
... indicated how redshift promises to be of importance for the study of penetrating radiation. § 1 Introduction. It has been known for a long time that there are certain objects in space, which, if observed with small telescopes, appear as strongly blurred, luminous spots. These objects vary in structu ...
... indicated how redshift promises to be of importance for the study of penetrating radiation. § 1 Introduction. It has been known for a long time that there are certain objects in space, which, if observed with small telescopes, appear as strongly blurred, luminous spots. These objects vary in structu ...
Silicon isotopic abundance toward evolved stars and its application
... the local area and raises the pressure, which initiates an expansion and a series of convective and mixing events (Herwig 2005; Iben & Renzini 1983). During the so-called third dredgeup, the products of He burning and the s-process elements are brought to the surface, e.g., 12 C, which can lead to t ...
... the local area and raises the pressure, which initiates an expansion and a series of convective and mixing events (Herwig 2005; Iben & Renzini 1983). During the so-called third dredgeup, the products of He burning and the s-process elements are brought to the surface, e.g., 12 C, which can lead to t ...
the fixed stars
... Influence of the constellation: "It gives authority and a sober mind, sometimes making its natives judges or arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cephe ...
... Influence of the constellation: "It gives authority and a sober mind, sometimes making its natives judges or arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cephe ...
Astronomy
... originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. Astronomy is one of the oldest sciences. Prehistoric cul ...
... originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. Astronomy is one of the oldest sciences. Prehistoric cul ...
Untitled - METU Astrophysics Home Page
... The possibility of the existence of neutron stars first came to be with the discovery of the neutrons by Chadwick in 1930s. Afterwards, one of the first ideas regarding their formation was proposed in the work of Baade and Zwicky in 1934, whom foreseen the likelihood of neutron stars’ birth in super ...
... The possibility of the existence of neutron stars first came to be with the discovery of the neutrons by Chadwick in 1930s. Afterwards, one of the first ideas regarding their formation was proposed in the work of Baade and Zwicky in 1934, whom foreseen the likelihood of neutron stars’ birth in super ...
NICMOS Coronagraphic Observations of 55 Cancri
... reclassified it as G8II-III, although a search through the literature spanning more than four decades (e.g., Nikonov et al. (1957), Marlborough (1964), and others) reveals no evidence of any optical variability as may be expected at some level for a sub-giant. Gonzalez (1998) confirmed its sub-giant ...
... reclassified it as G8II-III, although a search through the literature spanning more than four decades (e.g., Nikonov et al. (1957), Marlborough (1964), and others) reveals no evidence of any optical variability as may be expected at some level for a sub-giant. Gonzalez (1998) confirmed its sub-giant ...
Instruction Manual #11007 / #11008 / #11009 ®
... CPC Computerized mount with its new EdgeHD optical system. The CPC series uses GPS (Global Positioning System) technology to take the guesswork and effort out of aligning and finding celestial objects in the sky. Simple and easy to use, the CPC with its SkyAlign sky modeling system, is up and runnin ...
... CPC Computerized mount with its new EdgeHD optical system. The CPC series uses GPS (Global Positioning System) technology to take the guesswork and effort out of aligning and finding celestial objects in the sky. Simple and easy to use, the CPC with its SkyAlign sky modeling system, is up and runnin ...
Analysis of Angular Momentum in Planetary Systems and Host Stars
... in particular for the several conversations that generated helpful insights and suggestions in the direction of the thesis. Huge thanks to my major advisor, Dr. Samuel Durrance, who gave me this topic and is a big part of why I started (and finished) in the first place. The life of a Ph.D. student p ...
... in particular for the several conversations that generated helpful insights and suggestions in the direction of the thesis. Huge thanks to my major advisor, Dr. Samuel Durrance, who gave me this topic and is a big part of why I started (and finished) in the first place. The life of a Ph.D. student p ...
the stebbins galaxy: the origins of interstellar medium studies
... the Galaxy, shows the Sun to be far from that center. 2) The measured distances to globular clusters show the Galaxy to be about 70,000 parsecs (200,000 light-years or so) in diameter (Shapley, 1930a: 221). This is about twice the modern figure for the luminous Galaxy. In his earlier publications, a ...
... the Galaxy, shows the Sun to be far from that center. 2) The measured distances to globular clusters show the Galaxy to be about 70,000 parsecs (200,000 light-years or so) in diameter (Shapley, 1930a: 221). This is about twice the modern figure for the luminous Galaxy. In his earlier publications, a ...
CHARACTERIZING PROPERTIES OF OPTICAL FIBERS AND
... Figure 3-1: Xenics NIR camera quantum efficiency. ................................................. 60 Figure 3-2: Vibrator attached to 200-µm multimode fiber. ........................................ 61 Figure 3-3: 635-nm single mode fiber test: (left) 635-nm single mode fiber (average of 10 frames ...
... Figure 3-1: Xenics NIR camera quantum efficiency. ................................................. 60 Figure 3-2: Vibrator attached to 200-µm multimode fiber. ........................................ 61 Figure 3-3: 635-nm single mode fiber test: (left) 635-nm single mode fiber (average of 10 frames ...
exploring anticorrelations and light element variations
... of GC color–magnitude diagrams. In fact, while some clusters seem to photometrically comply with the simple stellar population paradigm, a growing number of them are found to be characterized by multiple main sequences and/or subgiant and/or giant branches (Piotto et al. 2007; Milone et al. 2008, e. ...
... of GC color–magnitude diagrams. In fact, while some clusters seem to photometrically comply with the simple stellar population paradigm, a growing number of them are found to be characterized by multiple main sequences and/or subgiant and/or giant branches (Piotto et al. 2007; Milone et al. 2008, e. ...
I N S T
... Utility Features......................................................................................................................................................................................23 GPS On/Off ........................................................................................ ...
... Utility Features......................................................................................................................................................................................23 GPS On/Off ........................................................................................ ...
Structure in the first quadrant of the Galaxy: an analysis of TMGS star
... 25-mm source counts. However, it has been successfully compared with observations at many other wavelengths including the farultraviolet (Cohen 1994; Cohen et al. 1994). The model has already been compared with DENIS K star counts in small regions (Ruphy et al. 1997) for the magnitude range mK 10– ...
... 25-mm source counts. However, it has been successfully compared with observations at many other wavelengths including the farultraviolet (Cohen 1994; Cohen et al. 1994). The model has already been compared with DENIS K star counts in small regions (Ruphy et al. 1997) for the magnitude range mK 10– ...
T3-Cosmic Star Formation History
... The origin and evolution of galaxies are among the most intriguing and complex chapters in the formation of cosmic structure, and observations in this field have accumulated at an astonishing pace. Multiwavelength imaging surveys with the Hubble (HST) and Spitzer space telescopes and ground-based fac ...
... The origin and evolution of galaxies are among the most intriguing and complex chapters in the formation of cosmic structure, and observations in this field have accumulated at an astonishing pace. Multiwavelength imaging surveys with the Hubble (HST) and Spitzer space telescopes and ground-based fac ...
Understanding Variable Stars - Central Florida Astronomical Society
... Schematic picture of a simple eclipsing binary, and its light curve 104 Light curve of the ellipsoidal variable ψ Ori 108 The Lagrangian surfaces around a pair of stars in mutual orbit 109 Schematic view of mass transfer from one component to the other 111 Light and velocity curves for AI Phe, a ‘cl ...
... Schematic picture of a simple eclipsing binary, and its light curve 104 Light curve of the ellipsoidal variable ψ Ori 108 The Lagrangian surfaces around a pair of stars in mutual orbit 109 Schematic view of mass transfer from one component to the other 111 Light and velocity curves for AI Phe, a ‘cl ...
Starter Edition Handbook
... Once you can find you way around the sky you will be able to find bright double stars. The next step is to hunt down your first real deep sky objects: open star clusters. Open star clusters are fairly easy to find and make for a pleasing view in your binoculars or telescope. SkyTools will be able to ...
... Once you can find you way around the sky you will be able to find bright double stars. The next step is to hunt down your first real deep sky objects: open star clusters. Open star clusters are fairly easy to find and make for a pleasing view in your binoculars or telescope. SkyTools will be able to ...
Observations of Jets and Outflows from Young Stars
... of protostellar outflows, and the measurement of the emission and absorption spectra of some HH objects in the UV (Section 2). At visual and near-IR wavelengths, the formats of detectors has continued to increase with pixel counts doubling approximately every two years. This has led to the first com ...
... of protostellar outflows, and the measurement of the emission and absorption spectra of some HH objects in the UV (Section 2). At visual and near-IR wavelengths, the formats of detectors has continued to increase with pixel counts doubling approximately every two years. This has led to the first com ...
Consistent metallicity scale for cool dwarfs and giants
... giant planet. The clump giant HIP 20889 has a long period planet (∼ 594 days) with ∼ 7.6 M J (Sato et al. 2007). More recently, Quinn et al. (2014) reported the discovery of the first hot Jupiter orbiting a K dwarf HD 285507 in this cluster. Our sample was selected as follows. The dwarfs were select ...
... giant planet. The clump giant HIP 20889 has a long period planet (∼ 594 days) with ∼ 7.6 M J (Sato et al. 2007). More recently, Quinn et al. (2014) reported the discovery of the first hot Jupiter orbiting a K dwarf HD 285507 in this cluster. Our sample was selected as follows. The dwarfs were select ...
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.