Preview Sample 1
... 41. Is this result surprising or not, and why? a. Surprising; there is no reason why any object should be larger across because it weighs more b. Surprising; stars are such complex objects that such a simple relationship should not be expected c. Not surprising; most objects in nature are larger if ...
... 41. Is this result surprising or not, and why? a. Surprising; there is no reason why any object should be larger across because it weighs more b. Surprising; stars are such complex objects that such a simple relationship should not be expected c. Not surprising; most objects in nature are larger if ...
variation in the pre-transit balmer line signal around
... signal from the latest transit. We also demonstrate the use of the Ca II H and K residual core flux as a proxy for the stellar activity level throughout the transit. A moderate trend is found between the pre-transit absorption signal in the 2013 data and the Ca II H flux. This suggests that some of th ...
... signal from the latest transit. We also demonstrate the use of the Ca II H and K residual core flux as a proxy for the stellar activity level throughout the transit. A moderate trend is found between the pre-transit absorption signal in the 2013 data and the Ca II H flux. This suggests that some of th ...
Radio pulsars
... • New population of high-B pulsars and new SNR associations • Globular clusters contain many millisecond pulsars • Precision timing of binary millisecond pulsars measures many properties of binary stars and tests general relativity. • Discovery of highly relativistic binary pulsar significantly incr ...
... • New population of high-B pulsars and new SNR associations • Globular clusters contain many millisecond pulsars • Precision timing of binary millisecond pulsars measures many properties of binary stars and tests general relativity. • Discovery of highly relativistic binary pulsar significantly incr ...
abstracts book - Instituto de Astrofísica e Ciências do Espaço
... across the HR diagram with a level of detail that was in no way foreseen in 1985. In spite of the great science successes, astero- and helioseismic data still contain many secrets waiting to be uncovered. The opportunity to use the existing data and tools to clarify major questions of stellar physic ...
... across the HR diagram with a level of detail that was in no way foreseen in 1985. In spite of the great science successes, astero- and helioseismic data still contain many secrets waiting to be uncovered. The opportunity to use the existing data and tools to clarify major questions of stellar physic ...
Tracing the Evolution and Impact of the Stellar Winds
... There is one section not shown in Figure 1.2 that lies between the termination shock and the heliosphere: the heliosheath. In this region, the solar wind becomes turbulent and continues to slow. The next section of the heliosphere is the heliopause. This is the precise boundary where the winds of th ...
... There is one section not shown in Figure 1.2 that lies between the termination shock and the heliosphere: the heliosheath. In this region, the solar wind becomes turbulent and continues to slow. The next section of the heliosphere is the heliopause. This is the precise boundary where the winds of th ...
THE HELIACAL RISE OF SIRIUS- Algorithm
... The atmospheric extinction for a given place shows how many star-magnitudes are extinguished by one earth atmosphere. In the best case, in a dry mountain desert, the extinction will be around 0.10. In the worse case, around some sea coasts, it may reach 0.40 and even 0.50. There are some scholars wh ...
... The atmospheric extinction for a given place shows how many star-magnitudes are extinguished by one earth atmosphere. In the best case, in a dry mountain desert, the extinction will be around 0.10. In the worse case, around some sea coasts, it may reach 0.40 and even 0.50. There are some scholars wh ...
LACEwING: A New Moving Group Analysis Code
... ò Cha to η Cha, suggesting a common or at least related origin. The groups have ages between ∼5 Myr old (ò Cha) and 600–800 Myr old (Hyades). The fundamental assumption about these NYMGs and open clusters is that they are the products of single bursts of star formation. This means that every constit ...
... ò Cha to η Cha, suggesting a common or at least related origin. The groups have ages between ∼5 Myr old (ò Cha) and 600–800 Myr old (Hyades). The fundamental assumption about these NYMGs and open clusters is that they are the products of single bursts of star formation. This means that every constit ...
Stargazing For Beginners: A Binocular Tour of the Southern Night Sky
... nebulae, and star clusters. It assumes you are equipped with nothing more than a simple pair of binoculars, and that you know nothing of astronomy or the layout of the night sky. The course is inspired by the 19th century book entitled Astronomy with an Opera Glass by Garrett Serviss, but has been c ...
... nebulae, and star clusters. It assumes you are equipped with nothing more than a simple pair of binoculars, and that you know nothing of astronomy or the layout of the night sky. The course is inspired by the 19th century book entitled Astronomy with an Opera Glass by Garrett Serviss, but has been c ...
(a) Mean solar time
... • UTC = Coordinated Universal Time. Related to UT1, but leap seconds are introduced when required so that UTC differs from International Atomic Time by an integral number of seconds. ...
... • UTC = Coordinated Universal Time. Related to UT1, but leap seconds are introduced when required so that UTC differs from International Atomic Time by an integral number of seconds. ...
Mapping of the extinction in giant molecular clouds using optical star
... which depends only on one or two free parameters. The mass spectrum of interstellar clouds can also be understood assuming a fractal structure (Elmegreen & Falgarone, 1996). Larson (1995) went further, showing that the Taurus cloud also presents a fractal structure in the distribution of its young s ...
... which depends only on one or two free parameters. The mass spectrum of interstellar clouds can also be understood assuming a fractal structure (Elmegreen & Falgarone, 1996). Larson (1995) went further, showing that the Taurus cloud also presents a fractal structure in the distribution of its young s ...
How to Build an Astrolabe - St John`s College, Cambridge
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
How to Build an Astrolabe
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
... * accuracy of assembly - cutting out, hole placement etc. * levels of accuracy of various parts: e.g. to nearest degree on protractor round edge, to nearest 5 degrees of altitude. * the earth is not a perfect sphere and does not move perfectly regularly through the sky. This means that the astrolabe ...
Prospects for asteroseismic inference on the envelope helium
... the sound speed at the base of the convection zone (BCZ) are similar enough that both components must be studied simultaneously. However, in red giant stars, which are the main focus of this study, the base of the convection zone is located deep within the stellar interior (typically at a radius of ...
... the sound speed at the base of the convection zone (BCZ) are similar enough that both components must be studied simultaneously. However, in red giant stars, which are the main focus of this study, the base of the convection zone is located deep within the stellar interior (typically at a radius of ...
the PDF program book
... There are five meeting rooms in UKK (rooms K1 – K4, K6) that may be used for meetings or telecons. The rooms are located on level 3 and seat between 12 and 24 people. If you want to hold a small meeting, you can either speak to the LOC representative at the registration desk or reserve a meeting roo ...
... There are five meeting rooms in UKK (rooms K1 – K4, K6) that may be used for meetings or telecons. The rooms are located on level 3 and seat between 12 and 24 people. If you want to hold a small meeting, you can either speak to the LOC representative at the registration desk or reserve a meeting roo ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... 1. Detection of the [O iii] k4363 emission line for the determination of oxygen abundances. 2. A reliable distance (i.e., determined from stellar constituents, such as Cepheids and the tip of the RGB [TRGB]). ...
... 1. Detection of the [O iii] k4363 emission line for the determination of oxygen abundances. 2. A reliable distance (i.e., determined from stellar constituents, such as Cepheids and the tip of the RGB [TRGB]). ...
Protoplanetary Discs
... If accretion is the dominant source of luminosity, all light emitted from the disc has to be balanced by the accretion luminosity. Plausibility argument: - a particle of mass Δm accreted from infinity initially has E grav = 0 - at the surface of the star, the virial theorem demands that the same par ...
... If accretion is the dominant source of luminosity, all light emitted from the disc has to be balanced by the accretion luminosity. Plausibility argument: - a particle of mass Δm accreted from infinity initially has E grav = 0 - at the surface of the star, the virial theorem demands that the same par ...
The science case for - Astrophysics
... and dark energy have all been discovered through the development of a succession of ever larger and more sophisticated telescopes. In the last decade, satellite observatories and the new generation of 8- to 10-metre diameter ground based telescopes, have created a new view of our Universe, one domin ...
... and dark energy have all been discovered through the development of a succession of ever larger and more sophisticated telescopes. In the last decade, satellite observatories and the new generation of 8- to 10-metre diameter ground based telescopes, have created a new view of our Universe, one domin ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.