A Search for New Solar-Type Post-T Tauri Stars in
... near- and far-ultraviolet universe. One area of astronomical research that is not well-served by the AIS, due to avoidance of the galactic plane, is young stars. According to Fischer (1998; PhD Thesis, UCSC) only 1% (2/189) of a volume-limited (d < 25 pc) sample of K stars have lithium abundances an ...
... near- and far-ultraviolet universe. One area of astronomical research that is not well-served by the AIS, due to avoidance of the galactic plane, is young stars. According to Fischer (1998; PhD Thesis, UCSC) only 1% (2/189) of a volume-limited (d < 25 pc) sample of K stars have lithium abundances an ...
Document
... H-R diagrams are useful because they help astronomers categorize stars into groups: Main sequence stars, like the Sun, are in a very stable part of their life cycle. White dwarfs are hot and dim and cannot be seen without a telescope. Red giants are cool and bright and some can be seen witho ...
... H-R diagrams are useful because they help astronomers categorize stars into groups: Main sequence stars, like the Sun, are in a very stable part of their life cycle. White dwarfs are hot and dim and cannot be seen without a telescope. Red giants are cool and bright and some can be seen witho ...
stellar spectra instructor notes
... etc. Provisions were also made in the original scheme for subdwarfs (= VI) and white dwarfs (= VIII), but those classes never became popular. Subdwarfs are now recognized as metalpoor stars that are difficult to classify in any case, and white dwarfs are degenerate stars (D) that have since been giv ...
... etc. Provisions were also made in the original scheme for subdwarfs (= VI) and white dwarfs (= VIII), but those classes never became popular. Subdwarfs are now recognized as metalpoor stars that are difficult to classify in any case, and white dwarfs are degenerate stars (D) that have since been giv ...
The Star Finder Book - Starpath School of Navigation
... After teaching celestial navigation to over 3,000 students during the past 6 years, we have well learned the recurring questions. We especially appreciate questions and comments of former students after they navigate their first ocean crossing. Comments from new navigators are invaluable to the deve ...
... After teaching celestial navigation to over 3,000 students during the past 6 years, we have well learned the recurring questions. We especially appreciate questions and comments of former students after they navigate their first ocean crossing. Comments from new navigators are invaluable to the deve ...
Chapter 13 Measuring the properties of stars
... The amount of energy emitted by a star each second is the ____ and is measured in ____. A. Apparent brightness; degrees K B. Temperature; degrees K C. Apparent brightness; Watts D. Luminosity; Watts ...
... The amount of energy emitted by a star each second is the ____ and is measured in ____. A. Apparent brightness; degrees K B. Temperature; degrees K C. Apparent brightness; Watts D. Luminosity; Watts ...
printer-friendly version of benchmark
... For more information concerning the brightness of stars, please visit http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_luminosity.html. Absolute magnitude correlates with the luminosity of a star. Luminosity can be thought of as the quantity of energy released by the star per u ...
... For more information concerning the brightness of stars, please visit http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_luminosity.html. Absolute magnitude correlates with the luminosity of a star. Luminosity can be thought of as the quantity of energy released by the star per u ...
Lecture 12
... • Types of binary stars – Visual – Spectroscopic – Eclipsing • Only way to measure stellar masses: – Only ~150 stars ...
... • Types of binary stars – Visual – Spectroscopic – Eclipsing • Only way to measure stellar masses: – Only ~150 stars ...
Properties of Stars - Montana State University Extended University
... properties. The easiest way to do this is make a plot of one intrinsic property vs. another intrinsic property. An intrinsic property is one that does not depend on the distance the star is from the Earth (e.g., temperature, mass, diameter, composition, and luminosity). By the beginning of the 20th ...
... properties. The easiest way to do this is make a plot of one intrinsic property vs. another intrinsic property. An intrinsic property is one that does not depend on the distance the star is from the Earth (e.g., temperature, mass, diameter, composition, and luminosity). By the beginning of the 20th ...
Document
... them → know their distance (with ~6% uncertainty) • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
... them → know their distance (with ~6% uncertainty) • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
m/s
... the radial velocity variations are all accompained by changes in the shape of the spectral lines. Planets on the other hand cause an overall Doppler shift of the line without an accompanying change in the lines. Spectral line bisectors are a common way to measure line shapes ...
... the radial velocity variations are all accompained by changes in the shape of the spectral lines. Planets on the other hand cause an overall Doppler shift of the line without an accompanying change in the lines. Spectral line bisectors are a common way to measure line shapes ...
Star-S_Teacher_Guide - The University of Texas at Dallas
... o If your students have already done the Scale Model Solar System Activity, discuss the usefulness of the scale factor. Ask your students what the advantage would be of modeling stars on the same scale. By using the same scale factor of 1:10 billion, the students will more easily be able to make com ...
... o If your students have already done the Scale Model Solar System Activity, discuss the usefulness of the scale factor. Ask your students what the advantage would be of modeling stars on the same scale. By using the same scale factor of 1:10 billion, the students will more easily be able to make com ...
The Physical Properties of Normal A Stars
... main sequence between A2V and F0V. Why are only 1/3 of these stars variable? 28 And, for example, has solar abundances. Dor stars Abt & associates find for most A stars a rotational velocity of approximately 120 km/s separates the slower rotating peculiar A stars from the normal A stars. Howeve ...
... main sequence between A2V and F0V. Why are only 1/3 of these stars variable? 28 And, for example, has solar abundances. Dor stars Abt & associates find for most A stars a rotational velocity of approximately 120 km/s separates the slower rotating peculiar A stars from the normal A stars. Howeve ...
26.4 Groups of Stars
... Sometimes the smaller star in a binary star is too dim to be seen easily from Earth but can still be detected from the motion of the other star. If one star passes in front of the other, blocking some of the light from reaching Earth, the star system is called an eclipsing binary. The brightness of ...
... Sometimes the smaller star in a binary star is too dim to be seen easily from Earth but can still be detected from the motion of the other star. If one star passes in front of the other, blocking some of the light from reaching Earth, the star system is called an eclipsing binary. The brightness of ...
OSP2016Level 3 Map - Oregon Star Party
... What is it? V404 Cyg is a black hole (12+/- 3 solar masses) with late K or early G type stellar companion that’s slightly smaller than the Sun, orbiting each other in less than 6.5 days. They are approximately 7800 light years away. Why you want to see it: The stellar companion is distorted into a ...
... What is it? V404 Cyg is a black hole (12+/- 3 solar masses) with late K or early G type stellar companion that’s slightly smaller than the Sun, orbiting each other in less than 6.5 days. They are approximately 7800 light years away. Why you want to see it: The stellar companion is distorted into a ...
Nazwy gwiazd nieba północnego o etymologii arabskiej
... 2.8.1 GOMEISA (Beta Canis Minoris).......................................................................21 2.9 CASSIOPEIA............................................................................................................21 2.9.1 SCHEDAR (Alpha Cassiopeiae).................................. ...
... 2.8.1 GOMEISA (Beta Canis Minoris).......................................................................21 2.9 CASSIOPEIA............................................................................................................21 2.9.1 SCHEDAR (Alpha Cassiopeiae).................................. ...
HR Diagram Explorer Worksheet
... HR Diagram Explorer Worksheet Open the HR Diagram Explorer. Begin by familiarizing yourself with the capabilities of the HertzsprungRussell Diagram Explorer through experimentation. An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active ...
... HR Diagram Explorer Worksheet Open the HR Diagram Explorer. Begin by familiarizing yourself with the capabilities of the HertzsprungRussell Diagram Explorer through experimentation. An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active ...
Dancing with Stars 3 Dancing with Stars Binary Stellar Evolution 1
... For two stars in a binary system, each reaches out to gravitationally dominate some region beyond its own surface, as shown in Figure 3.1. The more massive star, the star on the left in Figure 3.1, has a larger sphere of influence. If one carefully maps the regions of influence of each star, account ...
... For two stars in a binary system, each reaches out to gravitationally dominate some region beyond its own surface, as shown in Figure 3.1. The more massive star, the star on the left in Figure 3.1, has a larger sphere of influence. If one carefully maps the regions of influence of each star, account ...
DTU_9e_ch12
... star ejected the gas we see in two episodes, 6000 and 4000 years ago. The gas from any previous ejections is so thinly spread now that we cannot see it. The nebula shown in the inset is more than 4 ly (1.25 pc) across—it would stretch from the Sun nearly to the closest star, Proxima Centauri. The im ...
... star ejected the gas we see in two episodes, 6000 and 4000 years ago. The gas from any previous ejections is so thinly spread now that we cannot see it. The nebula shown in the inset is more than 4 ly (1.25 pc) across—it would stretch from the Sun nearly to the closest star, Proxima Centauri. The im ...
My Constellation
... equivalent: Praesepe, which not only means a hive but also a crib, or manger. This is a bright open cluster clearly visible to the naked eye on a dark enough night, and best appreciated with binoculars or small scope. One of the largest clusters, its 1.5 degree size is equivalent to three full moons ...
... equivalent: Praesepe, which not only means a hive but also a crib, or manger. This is a bright open cluster clearly visible to the naked eye on a dark enough night, and best appreciated with binoculars or small scope. One of the largest clusters, its 1.5 degree size is equivalent to three full moons ...
June - Magic Valley Astronomical Society
... 14th. See http://www.lunar-occultations.com/iota/iotandx.htm for information on lunar occultations taking place this month. Visit http://saberdoesthestars.wordpress.com/2011/07/05/saber-does-the-stars/ for tips on spotting extreme crescent Moons. Times and dates for the lunar light rays predicted to ...
... 14th. See http://www.lunar-occultations.com/iota/iotandx.htm for information on lunar occultations taking place this month. Visit http://saberdoesthestars.wordpress.com/2011/07/05/saber-does-the-stars/ for tips on spotting extreme crescent Moons. Times and dates for the lunar light rays predicted to ...
Perseid Watch at Weiser State Forest August 12
... On 5 July Jerry Follet, Keith Potteiger and Jim Davis manned the observatory, but it clouded over and we did not open. On 12 July we opened, but the sky was mostly obscured. 17 people showed up. Jerry Follet was able to get the King building roof motor repaired. An electrical part had burned out, al ...
... On 5 July Jerry Follet, Keith Potteiger and Jim Davis manned the observatory, but it clouded over and we did not open. On 12 July we opened, but the sky was mostly obscured. 17 people showed up. Jerry Follet was able to get the King building roof motor repaired. An electrical part had burned out, al ...
Automated Detection and Analysis of Meteor Events Using Nightly
... by the Earth passing through the path of a comet and moving through the debris (Paschoff, ...
... by the Earth passing through the path of a comet and moving through the debris (Paschoff, ...
3P15.pdf
... the photosphere to the total surface flux emitted by the star. Fig. 4a to 7a show, for all the stars of the sample, the mean value of the excess emission of the Hα line vs. the mean value of the excess emission of other chromospheric lines (Ca II λ8542Å, Ca II K, Hβ and Hγ). Fig. 4b to 7b show the s ...
... the photosphere to the total surface flux emitted by the star. Fig. 4a to 7a show, for all the stars of the sample, the mean value of the excess emission of the Hα line vs. the mean value of the excess emission of other chromospheric lines (Ca II λ8542Å, Ca II K, Hβ and Hγ). Fig. 4b to 7b show the s ...
Notes 6 - University of Northern Iowa
... layer producing more carbon and oxygen. This goes on until the helium fusion layer reaches the base of the old hydrogen fusion layer. The presence of the hot helium fusion layer causes the hydrogen fusion to start up again, which has a stabilizing effect on the core. Since hydrogen fusion produces ...
... layer producing more carbon and oxygen. This goes on until the helium fusion layer reaches the base of the old hydrogen fusion layer. The presence of the hot helium fusion layer causes the hydrogen fusion to start up again, which has a stabilizing effect on the core. Since hydrogen fusion produces ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.