Main-Sequence Stars and the Sun
... absorption lines in the visible part of the spectrum with spectral class, and their relation to the surface temperature of the star is as follows. Hydrogen Balmer lines. Absorption lines caused by hydrogen atoms that are initially in the first excited state (see Chapter 1) are referred to as Balmer ...
... absorption lines in the visible part of the spectrum with spectral class, and their relation to the surface temperature of the star is as follows. Hydrogen Balmer lines. Absorption lines caused by hydrogen atoms that are initially in the first excited state (see Chapter 1) are referred to as Balmer ...
the article as PDF - Project VS
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
Export To Word
... Response Letter, Guiding Questions, Data Chart 1). These will be graded by the teacher at a later time (note: do not grade the H-R Diagram until the students have completed the full MEA parts 1 and 2). Using the projector or smartboard, review all of the information with the entire class. You esse ...
... Response Letter, Guiding Questions, Data Chart 1). These will be graded by the teacher at a later time (note: do not grade the H-R Diagram until the students have completed the full MEA parts 1 and 2). Using the projector or smartboard, review all of the information with the entire class. You esse ...
Astron 104 Laboratory #9 Cepheid Variable Stars
... Figure 1: How a Cepheid star changes brightness with time. function of time. Note that the vertical axis represents the apparent magnitude, which can be easily measured, not the absolute magnitude. Click anywhere on the plot to return to the view of the sky. To assist you in making accurate readings ...
... Figure 1: How a Cepheid star changes brightness with time. function of time. Note that the vertical axis represents the apparent magnitude, which can be easily measured, not the absolute magnitude. Click anywhere on the plot to return to the view of the sky. To assist you in making accurate readings ...
Do We Know of Any Maunder Minimum Stars?
... Baliunas & Jastrow (1990) suggested that the activity level of the sun during the Maunder Minimum corresponded to that of these low-activity stars, S = 0.1451. Zhang et al. (1994) applied this value to an analysis of the effects of stellar activity on brightness and concluded that the Sun was 0.2 − ...
... Baliunas & Jastrow (1990) suggested that the activity level of the sun during the Maunder Minimum corresponded to that of these low-activity stars, S = 0.1451. Zhang et al. (1994) applied this value to an analysis of the effects of stellar activity on brightness and concluded that the Sun was 0.2 − ...
Magnetic fields in O-, B- and A-type stars on the main sequence
... 2 Observational results obtained with current spectropolarimetry 2.1 Magnetic field properties of intermediate- and high-mass stars 2.1.1 Two classes of magnetism among A-type stars ...
... 2 Observational results obtained with current spectropolarimetry 2.1 Magnetic field properties of intermediate- and high-mass stars 2.1.1 Two classes of magnetism among A-type stars ...
Basic principles of celestial navigation
... horizon. These comments are applicable to all celestial objects for which '#!90°!%". Stars whose declinations meet this condition transit the observer’s meridian at intervals of exactly one sidereal day; but the intervals between the successive transits of planets, the Sun and the Moon vary, althoug ...
... horizon. These comments are applicable to all celestial objects for which '#!90°!%". Stars whose declinations meet this condition transit the observer’s meridian at intervals of exactly one sidereal day; but the intervals between the successive transits of planets, the Sun and the Moon vary, althoug ...
Mergers of massive main sequence binaries
... In this bachelor research project, we investigated mergers between close main-sequence binaries with the aim of determining whether they result in blue stragglers. We define blue stragglers to be hot and luminous stars that cannot be explained with canonical single star evolution models2 . Using a p ...
... In this bachelor research project, we investigated mergers between close main-sequence binaries with the aim of determining whether they result in blue stragglers. We define blue stragglers to be hot and luminous stars that cannot be explained with canonical single star evolution models2 . Using a p ...
Stellarium User Guide - Skolekonsulenterne.dk
... planetarium. It will calculate the positions of the Sun and Moon, planets and stars, and draw how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. S ...
... planetarium. It will calculate the positions of the Sun and Moon, planets and stars, and draw how the sky would look to an observer depending on their location and the time. It can also draw the constellations and simulate astronomical phenomena such as meteor showers, and solar or lunar eclipses. S ...
tut35 Magnitudes
... of asteroids, comets, and meteors. Factors such as color, albedo, and phase angles must, at times, be considered in their evaluation. The article will cover this topic with example calculations that can provide a firmer understanding of astronomical magnitudes. 1. SOME HISTORY Greek astronomers were ...
... of asteroids, comets, and meteors. Factors such as color, albedo, and phase angles must, at times, be considered in their evaluation. The article will cover this topic with example calculations that can provide a firmer understanding of astronomical magnitudes. 1. SOME HISTORY Greek astronomers were ...
Statistical analysis of stellar evolution
... its dominant position in a CMD, the evolved red giants, and the even older white dwarfs. Today the physical processes that govern stellar formation and evolution are studied with complex computer models that can be used to predict the plotted magnitudes on a set of CMDs as a function of stellar para ...
... its dominant position in a CMD, the evolved red giants, and the even older white dwarfs. Today the physical processes that govern stellar formation and evolution are studied with complex computer models that can be used to predict the plotted magnitudes on a set of CMDs as a function of stellar para ...
P1 topic 3 - WordPress.com
... *b While the origin of stars is well understood, there is still much debate about the origin of the Universe. Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By consider ...
... *b While the origin of stars is well understood, there is still much debate about the origin of the Universe. Two major theories about the origin of the Universe are the Big Bang and the Steady State theories. Some evidence supports both theories. Other evidence supports only one theory. By consider ...
Solutions
... On Dec 21 the Sun is at the Winter Solstice on the Ecliptic at -23½ dec. It is thus acting like a southern star. Southern stars rise S of E, reach a low max altitude, rest S of W and spend less than 12 hours above the horizon because most of their diurnal path is below the horizon (See Figure to ri ...
... On Dec 21 the Sun is at the Winter Solstice on the Ecliptic at -23½ dec. It is thus acting like a southern star. Southern stars rise S of E, reach a low max altitude, rest S of W and spend less than 12 hours above the horizon because most of their diurnal path is below the horizon (See Figure to ri ...
Astronomy Assignment #1
... On Dec 21 the Sun is at the Winter Solstice on the Ecliptic at -23½ dec. It is thus acting like a southern star. Southern stars rise S of E, reach a low max altitude, rest S of W and spend less than 12 hours above the horizon because most of their diurnal path is below the horizon (See Figure to ri ...
... On Dec 21 the Sun is at the Winter Solstice on the Ecliptic at -23½ dec. It is thus acting like a southern star. Southern stars rise S of E, reach a low max altitude, rest S of W and spend less than 12 hours above the horizon because most of their diurnal path is below the horizon (See Figure to ri ...
The Interstellar Medium White Paper
... Hydrogen is the dominant constituent in gas clouds, found as H and H2 in the atomic and molecular clouds. However, while hydrogen can readily be detected through its 21cm HI line, this does not provide a ready distinction as to whether the emitting gas comes from the cold neutral or warm neutral pha ...
... Hydrogen is the dominant constituent in gas clouds, found as H and H2 in the atomic and molecular clouds. However, while hydrogen can readily be detected through its 21cm HI line, this does not provide a ready distinction as to whether the emitting gas comes from the cold neutral or warm neutral pha ...
Rotation Periods of Wide Binaries in the Kepler Field
... on somewhat different photometric systems, each of the catalogs includes a red magnitude reasonably close to the SDSS r filter. While the tabulated proper motion uncertainties in these catalogs are typically a few milliarcseconds per year, the actual proper motion differences from one catalog to the ...
... on somewhat different photometric systems, each of the catalogs includes a red magnitude reasonably close to the SDSS r filter. While the tabulated proper motion uncertainties in these catalogs are typically a few milliarcseconds per year, the actual proper motion differences from one catalog to the ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.