The HERMES GALAH survey: overview
... Galactic bar or spiral structure. The Hercules group seen in Figure 3 is an example. Its stars are chemically a typical sample of the nearby disk, with a wide range of chemical abundances. These resonance groups are dynamically interesting but are of limited interest for Galactic archaeology. Some ...
... Galactic bar or spiral structure. The Hercules group seen in Figure 3 is an example. Its stars are chemically a typical sample of the nearby disk, with a wide range of chemical abundances. These resonance groups are dynamically interesting but are of limited interest for Galactic archaeology. Some ...
Part IV: Stars
... Instructor Guide for The Essential Cosmic Perspective, Sixth Edition 140 Sun is yellow, they can have trouble with the idea that the Sun would look nearly white if they were not seeing it through Earth’s atmosphere. However, when astronomers speak of “white stars,” they are usually talking about st ...
... Instructor Guide for The Essential Cosmic Perspective, Sixth Edition 140 Sun is yellow, they can have trouble with the idea that the Sun would look nearly white if they were not seeing it through Earth’s atmosphere. However, when astronomers speak of “white stars,” they are usually talking about st ...
17_Testbank
... A) The giant must once have been the more massive star but transferred some of its mass to its companion. B) Despite the low odds of finding a system with two such massive stars, there is nothing surprising about the fact that such systems exist. C) The two stars probably were once separate but beca ...
... A) The giant must once have been the more massive star but transferred some of its mass to its companion. B) Despite the low odds of finding a system with two such massive stars, there is nothing surprising about the fact that such systems exist. C) The two stars probably were once separate but beca ...
... 3. THE RR LYRAE STARS IN M15 In Clement’s (2002) data base of variables stars, a total of 158 variable stars are known, from which approximately 104 are RR Lyrae type stars. In this work, 33 known RR Lyrae stars, identified in Figs. 1 and 2 and listed in Table 4, have been studied. For all the stars ...
White dwarf binaries
... Flickering found in UX UMa (Linnell 1949, 1950) 71 s pulsations in DQ Her (Walker 1956) Identification of WD as primary in CVs AE Aqr secondary filling Roche lobe (Crawford and Kraft 1956) All CVs are binaries undergoing mass transfer onto WD (Kraft 1962) Accretion disk responsible for outburst ligh ...
... Flickering found in UX UMa (Linnell 1949, 1950) 71 s pulsations in DQ Her (Walker 1956) Identification of WD as primary in CVs AE Aqr secondary filling Roche lobe (Crawford and Kraft 1956) All CVs are binaries undergoing mass transfer onto WD (Kraft 1962) Accretion disk responsible for outburst ligh ...
black hole
... The first white dwarf discovered was the faint companion to the well-known star Sirius. Sirius, the brightest star in the sky, is a visual binary star, the most luminous member of which is Sirius A. The white dwarf, Sirius B, is 10,000 times fainter than Sirius A. ...
... The first white dwarf discovered was the faint companion to the well-known star Sirius. Sirius, the brightest star in the sky, is a visual binary star, the most luminous member of which is Sirius A. The white dwarf, Sirius B, is 10,000 times fainter than Sirius A. ...
StellarManual
... An incomplete sentence is presented that indicates the size and surface temperature a certain star has relative to the Sun. Students should determine how the stellar luminosity will compare with the Sun. Initially there is no equation displayed. Answer: Luminosity of a star is proportional to the sq ...
... An incomplete sentence is presented that indicates the size and surface temperature a certain star has relative to the Sun. Students should determine how the stellar luminosity will compare with the Sun. Initially there is no equation displayed. Answer: Luminosity of a star is proportional to the sq ...
Polaris
... While being honored as the North Star, Polaris enjoys the title of Lodestar and Cynosure as well. Polaris science. The single point of light that we see as Polaris is actually a triple star system, or three stars orbiting a common center of mass. The primary star, Polaris A, is a supergiant with abo ...
... While being honored as the North Star, Polaris enjoys the title of Lodestar and Cynosure as well. Polaris science. The single point of light that we see as Polaris is actually a triple star system, or three stars orbiting a common center of mass. The primary star, Polaris A, is a supergiant with abo ...
Lecture 14
... Alternative unit of distance “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
... Alternative unit of distance “1 Light Year is the distance traveled by light in one year.” Relation to other units: 1 light year (ly) is equivalent to 0.31 pc 63,270 AU ...
WHAT MAKES A STAR SO SPECIAL Abstract
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
... 1. The teacher introduces the physical characteristics of stars and the spectral classification to the students (you can use the information from the Introduction section as a supplement to the lesson about Star characteristics in the textbook you are using). 2. The teacher gives every student an en ...
Teacher`s Guide - Cornell Science Inquiry Partnerships
... Astronomy, Earth Science Audience This activity is aimed at a high school audience, but it could easily be modified for use with middle school students. Time Required The essential activities can be covered in 40 minutes, or the entire project can be stretched to 4 hours or even much longer. (In the ...
... Astronomy, Earth Science Audience This activity is aimed at a high school audience, but it could easily be modified for use with middle school students. Time Required The essential activities can be covered in 40 minutes, or the entire project can be stretched to 4 hours or even much longer. (In the ...
Star Formation in Bok Globules - European Southern Observatory
... is a huge, faintly luminous H 1I region spread over more than 30 degrees of the southern sky. At a distance of roughly 450 pc this corresponds to a radius of about 125 pc, making the Gum Nebula one of the largest structures known in our galaxy. Near its center are several objects which tagether prod ...
... is a huge, faintly luminous H 1I region spread over more than 30 degrees of the southern sky. At a distance of roughly 450 pc this corresponds to a radius of about 125 pc, making the Gum Nebula one of the largest structures known in our galaxy. Near its center are several objects which tagether prod ...
JHK standard stars for large telescopes: the UKIRT Fundamental
... capacitance. The observations were done through apertures of angular diameter 8 or 12 arcsec on the sky, with background removal by chopping with the secondary mirror. The observations were made relative to numerous stars from the CIT-based UKIRT ‘in-house’ standards, mentioned above. The results we ...
... capacitance. The observations were done through apertures of angular diameter 8 or 12 arcsec on the sky, with background removal by chopping with the secondary mirror. The observations were made relative to numerous stars from the CIT-based UKIRT ‘in-house’ standards, mentioned above. The results we ...
Cepheid
... That They Were All Identical …then life becomes very simple! Suppose, for example, that Henrietta later found a Cepheid in a more remote nebula (like M31, the Andromeda nebula) It would look much fainter than the ones she has been observing in the nearby LMC. This tells us the relative distance. [Fo ...
... That They Were All Identical …then life becomes very simple! Suppose, for example, that Henrietta later found a Cepheid in a more remote nebula (like M31, the Andromeda nebula) It would look much fainter than the ones she has been observing in the nearby LMC. This tells us the relative distance. [Fo ...
Stellar Masses
... called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps best called planets. Thus there is a natural lower limit to ...
... called brown dwarfs, and are ‘star like’ in the sense that nuclear burning of deuterium occurs in their core. Below a mass of 0.015M⊙ (roughly 16 times the mass of Jupiter) not even deuterium burning can occur, and these objects are perhaps best called planets. Thus there is a natural lower limit to ...
A very massive runaway star from Cygnus OB2⋆
... system is 58 84, very similar to the position angle of its resid- ...
... system is 58 84, very similar to the position angle of its resid- ...
