Hubble Space Telescope Imaging of Post
... corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributions from both stellar and AGN components. Thus, some selected PSQs might be included in the sample th ...
... corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributions from both stellar and AGN components. Thus, some selected PSQs might be included in the sample th ...
A Revised DDO Abundance Calibration for Population I Red Giants
... correcting them for blanketing effect which introduces the first inconsistency. On the other hand, the cyanogen anomaly should be referred to the G and Κ giants in the solar neighbourhood (and not to the solar-abundance giants) because these first ones were used by Janes (1975) to define the δCN ind ...
... correcting them for blanketing effect which introduces the first inconsistency. On the other hand, the cyanogen anomaly should be referred to the G and Κ giants in the solar neighbourhood (and not to the solar-abundance giants) because these first ones were used by Janes (1975) to define the δCN ind ...
here - Ira-Inaf
... we observed, 59 are from the Wouterloot and Brand (1989) catalogue, 5 are from Digel et al. (1994), and 6 are from Bronfman et al. (1996). The 70 selected GMCs from the 3 sources described above cover a range in RG between 8.5 and 23.5 kpc, and a total of 75 lines of sight were observed. Sixty-nine ...
... we observed, 59 are from the Wouterloot and Brand (1989) catalogue, 5 are from Digel et al. (1994), and 6 are from Bronfman et al. (1996). The 70 selected GMCs from the 3 sources described above cover a range in RG between 8.5 and 23.5 kpc, and a total of 75 lines of sight were observed. Sixty-nine ...
Open clusters in the Third Galactic Quadrant III. Alleged binary
... can simultaneously obtain the color excess, the distance modulus and also the age of the cluster. In one case, given the large amount of internal reddening (see Sect. 4.2.1), the range of distance modulus is so large that we only indicate extreme values of the interval instead of the fitting uncerta ...
... can simultaneously obtain the color excess, the distance modulus and also the age of the cluster. In one case, given the large amount of internal reddening (see Sect. 4.2.1), the range of distance modulus is so large that we only indicate extreme values of the interval instead of the fitting uncerta ...
The beautiful rings of Saturn consist of countless centimeter
... planet under the influence of gravity. Chapter Goal: To use Newton’s theory of gravity to understand the motion of satellites and planets. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley. ...
... planet under the influence of gravity. Chapter Goal: To use Newton’s theory of gravity to understand the motion of satellites and planets. Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley. ...
PPT Version
... The past few days and the next few days If you can believe anything that we’re told…. It seems that when anything serious happens they turn off all the really important stuff so no-one can see anything. The first time it happened it may have been a genuine coincidental accident that the the three mo ...
... The past few days and the next few days If you can believe anything that we’re told…. It seems that when anything serious happens they turn off all the really important stuff so no-one can see anything. The first time it happened it may have been a genuine coincidental accident that the the three mo ...
How To Use Plastic Sextants - Starpath School of Navigation
... are labeled in degrees along the side of the arc. A worm gear at the base of the index arm presses into these notches as it moves along the arc. This gear is encased in the plastic of the Mark 15. A similar design on a metal sextant is shown in Figure 1-4. Large changes in sextant angle are made by ...
... are labeled in degrees along the side of the arc. A worm gear at the base of the index arm presses into these notches as it moves along the arc. This gear is encased in the plastic of the Mark 15. A similar design on a metal sextant is shown in Figure 1-4. Large changes in sextant angle are made by ...
Protoplanetary Discs
... Typical T Tauri star accretion rates: Ṁ ~ 10-8 Msun/yr ⇒ L* >> GM* Ṁ / R* In many T Tauri stars, irradiation dominates, and disc heating defines T d . In more massive stars, during eposides of burst-like accretion, accretion rates can achieve Ṁ ~ 10-4 Msun/yr ⇒ L* ≲ GM* Ṁ / R* During accretion burst ...
... Typical T Tauri star accretion rates: Ṁ ~ 10-8 Msun/yr ⇒ L* >> GM* Ṁ / R* In many T Tauri stars, irradiation dominates, and disc heating defines T d . In more massive stars, during eposides of burst-like accretion, accretion rates can achieve Ṁ ~ 10-4 Msun/yr ⇒ L* ≲ GM* Ṁ / R* During accretion burst ...
thick disk - asteroSTEP
... galaxies) vary from satellite to satellite, and are different in detail from the more homogeneous overall properties of the disk stars. We can think of a chemical space of abundances of elements O, Na, Mg, Al, Ca, Mn, Fe, Cu, Sr, Ba, Eu for example. The dimensionality of this space is between about ...
... galaxies) vary from satellite to satellite, and are different in detail from the more homogeneous overall properties of the disk stars. We can think of a chemical space of abundances of elements O, Na, Mg, Al, Ca, Mn, Fe, Cu, Sr, Ba, Eu for example. The dimensionality of this space is between about ...
PHY 104 Introduction to Astronomy - Missouri Western State University
... This course is an introduction to our modern view of the universe, its contents, and how they got to be the way they are. Among the topics we will discuss are galaxies, quasars, stars, and black holes. For each of these objects, we will talk about what they are, how they are observed, how they form, ...
... This course is an introduction to our modern view of the universe, its contents, and how they got to be the way they are. Among the topics we will discuss are galaxies, quasars, stars, and black holes. For each of these objects, we will talk about what they are, how they are observed, how they form, ...
Circumstellar dust emission from nearby Solar
... et al. 2003). Furthermore, Lagrange et al. (2009) were able to directly image a giant planet using the Very Large Telescope (VLT). They inferred a mass of 8 MJup 1 with an orbit semimajor axis of ∼ 8 AU. (See also the review by Artymowicz 1997 on β Pic.) More indications of circumstellar dust were f ...
... et al. 2003). Furthermore, Lagrange et al. (2009) were able to directly image a giant planet using the Very Large Telescope (VLT). They inferred a mass of 8 MJup 1 with an orbit semimajor axis of ∼ 8 AU. (See also the review by Artymowicz 1997 on β Pic.) More indications of circumstellar dust were f ...
Timescales for the evolution of oxygen isotope compositions in the
... terrestrial Sun. The Sun is apparently 16O-rich; although it is not known at the present time whether the composition lies along the CAI mixing line because of uncertainties in mass-dependent corrections to the data, we will assume hereafter that it does lie on this line. The self-shielding models a ...
... terrestrial Sun. The Sun is apparently 16O-rich; although it is not known at the present time whether the composition lies along the CAI mixing line because of uncertainties in mass-dependent corrections to the data, we will assume hereafter that it does lie on this line. The self-shielding models a ...
Stellar Structure and Evolution
... of Aarhus. The goal of the course and the notes is to show how many aspects of stellar evolution can be understood relatively simply in terms of basic physics. Apart from the intrinsic interest of the topic, the value of such a course is that it provides an illustration (within the syllabus in Aarhu ...
... of Aarhus. The goal of the course and the notes is to show how many aspects of stellar evolution can be understood relatively simply in terms of basic physics. Apart from the intrinsic interest of the topic, the value of such a course is that it provides an illustration (within the syllabus in Aarhu ...
PhD thesis - Hamburger Sternwarte
... First, a transformation equation was derived for the HRT S-intex to be the Mount Wilson S-index so that it is possible to compare the activity levels of stars observed at different observatories. Thereafter, new photospheric flux corrections which depend on the colour index B − V for Ca H+K lines we ...
... First, a transformation equation was derived for the HRT S-intex to be the Mount Wilson S-index so that it is possible to compare the activity levels of stars observed at different observatories. Thereafter, new photospheric flux corrections which depend on the colour index B − V for Ca H+K lines we ...
Evolution of low mass stars
... The HRD inspired an English astronomer, Sir Arthur Stanley Eddington (18821944), when Russell visited London and presented his diagram at a meeting of the Royal Astronomical Society in 1913 (Eisberg, 2002). At the time, Eddington was the chief assistant of the Royal Greenwich Observatory. In 1926 Ed ...
... The HRD inspired an English astronomer, Sir Arthur Stanley Eddington (18821944), when Russell visited London and presented his diagram at a meeting of the Royal Astronomical Society in 1913 (Eisberg, 2002). At the time, Eddington was the chief assistant of the Royal Greenwich Observatory. In 1926 Ed ...
Examiners` Report June 2012 GCSE Astronomy 5AS01 01
... write before putting pen to paper. There ought to be plenty of time to consider your response prior to writing it down, and this will probably mean that you are unlikely to miss out what might at first be an obvious point to include. ...
... write before putting pen to paper. There ought to be plenty of time to consider your response prior to writing it down, and this will probably mean that you are unlikely to miss out what might at first be an obvious point to include. ...
Pair instability supernovae: Evolution, explosion, nucleosynthesis
... only zero and extremely low metallicity evolutionary models computed for this particular supernovae type. The recent discovery of so called super-luminous supernovae in the local Universe revealed the need for corresponding models at higher metallicity. This thesis is based on the self-consistent ev ...
... only zero and extremely low metallicity evolutionary models computed for this particular supernovae type. The recent discovery of so called super-luminous supernovae in the local Universe revealed the need for corresponding models at higher metallicity. This thesis is based on the self-consistent ev ...
Diapositive 1
... Aladin and Stellarium are available in the languages of the partners, Simplay is in English, French and Italian Massimo Ramella, WPMTL, INAF ...
... Aladin and Stellarium are available in the languages of the partners, Simplay is in English, French and Italian Massimo Ramella, WPMTL, INAF ...
The physics of star formation
... regions heated by luminous newly formed stars. In typical molecular clouds, cooling is due mostly to the emission of far-infrared radiation from molecules such as CO, which is usually the most important coolant (McKee et al 1982; Gilden 1984). However, in the densest collapsing cloud cores the gas b ...
... regions heated by luminous newly formed stars. In typical molecular clouds, cooling is due mostly to the emission of far-infrared radiation from molecules such as CO, which is usually the most important coolant (McKee et al 1982; Gilden 1984). However, in the densest collapsing cloud cores the gas b ...
– 1 – 1. Emission Lines in Nearby Galaxies 1.1.
... history), nucleosynthesis yields (ranging from just studying some total metallicity to following each element individually). See the earlier discussion of chemical evolution models, both analytical and numerical, as well as the semi-analytical models which combine these factors with a cosmological h ...
... history), nucleosynthesis yields (ranging from just studying some total metallicity to following each element individually). See the earlier discussion of chemical evolution models, both analytical and numerical, as well as the semi-analytical models which combine these factors with a cosmological h ...
Development of Iodine Cells for the Subaru HDS and the Okayama
... radial velocity (Jupiter imparts a velocity of 12.4 m s−1 on the Sun and the 5-min solar oscillation has a radial velocity amplitude of a few ten cm s−1 ) are very much smaller than the precision achieved by conventional techniques, such as determining a wavelength scale by other exposures of a refe ...
... radial velocity (Jupiter imparts a velocity of 12.4 m s−1 on the Sun and the 5-min solar oscillation has a radial velocity amplitude of a few ten cm s−1 ) are very much smaller than the precision achieved by conventional techniques, such as determining a wavelength scale by other exposures of a refe ...
The isotopic mixture of barium in the metal-poor
... et al. (2000) by the Unsöld approximation, our abundance estimate would increase by 0.04 dex. 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 metallici ...
... et al. (2000) by the Unsöld approximation, our abundance estimate would increase by 0.04 dex. 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 metallici ...
Educator`s Guide
... mentioned in Aratus’ poem) is centered on a place in the sky where the South Celestial Pole would have been located. - This coincides with the time of the Sumerians and the Babylonians. - It is highly likely that the Sumerians and the Babylonians originated the idea of the constellations and even th ...
... mentioned in Aratus’ poem) is centered on a place in the sky where the South Celestial Pole would have been located. - This coincides with the time of the Sumerians and the Babylonians. - It is highly likely that the Sumerians and the Babylonians originated the idea of the constellations and even th ...
Beyond simple depletion: phase behaviour of colloid–star polymer
... Colloids, polymers and surfactants almost always occur in the form of mixtures, whether in nature or as industrial products. One of the main tasks of soft condensed matter physics is to give generic (i.e. chemical-details-independent) insight into the structure, dynamics, phase behaviour and non-equ ...
... Colloids, polymers and surfactants almost always occur in the form of mixtures, whether in nature or as industrial products. One of the main tasks of soft condensed matter physics is to give generic (i.e. chemical-details-independent) insight into the structure, dynamics, phase behaviour and non-equ ...