Spectral Variations of Three RV Tauri Stars Donald K. Walter
... these stars including observations from 2003 to the present. Changes on the order of several spectral types and luminosity classes are observed. We discuss each object’s shift in position on the L vs. T diagram as a function of the phase of their light curve. Our photometric data is taken from the A ...
... these stars including observations from 2003 to the present. Changes on the order of several spectral types and luminosity classes are observed. We discuss each object’s shift in position on the L vs. T diagram as a function of the phase of their light curve. Our photometric data is taken from the A ...
... aperture telescope, this galaxy can only be seen in long exposure photographs on very large telescopes. The stars that make up sculptor are relatively faint, with Alpha Sculptor is shining at magnitude 4.3, but there are a few worth a good look: Eplison (ε) Sculptoris is a binary system with the mai ...
Properties of Ellipticals and Spirals
... • They do Not have a Disk; • They are tri-axial (comparable to a football); • They do not have dust; • They do NOT have hot young stars; most stars have formed a long time ago; • Their colors are red not because of reddening by ...
... • They do Not have a Disk; • They are tri-axial (comparable to a football); • They do not have dust; • They do NOT have hot young stars; most stars have formed a long time ago; • Their colors are red not because of reddening by ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... planets- are not unique, but quite common for stars of solar type; also the phenomena characteristic of T Tauri stars and related objects are regarded as a clue to some of the events in the early history of our planetary system. II.-Some remarks on the existence of young stars below the main sequenc ...
... planets- are not unique, but quite common for stars of solar type; also the phenomena characteristic of T Tauri stars and related objects are regarded as a clue to some of the events in the early history of our planetary system. II.-Some remarks on the existence of young stars below the main sequenc ...
Archaeology of the Milky Way - Max-Planck
... close to a spiral arm, it is attracted by the stronger gravity and accelerated – like a surfer on a big wave. If that star rides in front of this spiral wave, the star moves farther away from the center of the Milky Way onto a larger orbit. If, after a few hundred million years, this star happens to ...
... close to a spiral arm, it is attracted by the stronger gravity and accelerated – like a surfer on a big wave. If that star rides in front of this spiral wave, the star moves farther away from the center of the Milky Way onto a larger orbit. If, after a few hundred million years, this star happens to ...
D109-08x
... and I CCD imaging obtained in 1985 using the Palomar 60 inch telescope allowed individual measurements to be made of some of the brighter knots. The average luminosity of these knots (with sizes of 2-5 kpc) was measured to be MV ~ -16.2 (substantially brighter than most dwarf galaxies) with individu ...
... and I CCD imaging obtained in 1985 using the Palomar 60 inch telescope allowed individual measurements to be made of some of the brighter knots. The average luminosity of these knots (with sizes of 2-5 kpc) was measured to be MV ~ -16.2 (substantially brighter than most dwarf galaxies) with individu ...
DTU_9e_ch12
... To the left of Alnitak is a bright, red emission nebula called NGC 2024. The glowing gases in emission nebulae are excited by UV radiation from young, massive stars. Dust grains obscure part of NGC 2024, giving the appearance of black streaks, while the distinctively shaped dust cloud, called the Ho ...
... To the left of Alnitak is a bright, red emission nebula called NGC 2024. The glowing gases in emission nebulae are excited by UV radiation from young, massive stars. Dust grains obscure part of NGC 2024, giving the appearance of black streaks, while the distinctively shaped dust cloud, called the Ho ...
A billion pixels, a billion stars
... One of the earliest successes for Einstein’s theory of general relativity was its ability to describe the precession of the (elliptical) orbit of Mercury. Another was the theory’s prediction (famously tested by Arthur Eddington and Frank Dyson during the 1919 solar eclipse) that light from distant s ...
... One of the earliest successes for Einstein’s theory of general relativity was its ability to describe the precession of the (elliptical) orbit of Mercury. Another was the theory’s prediction (famously tested by Arthur Eddington and Frank Dyson during the 1919 solar eclipse) that light from distant s ...
My Constellation
... The Crab plays a minor role in the Labors of Hercules (Heracles in Greek). The second task that Hercules had to accomplish was to slay the Hydra. The Hydra was a multiheaded snakelike monster. Hercules grappled with it and slashed at it with his sword, but as soon as Hercules cut off one head of the ...
... The Crab plays a minor role in the Labors of Hercules (Heracles in Greek). The second task that Hercules had to accomplish was to slay the Hydra. The Hydra was a multiheaded snakelike monster. Hercules grappled with it and slashed at it with his sword, but as soon as Hercules cut off one head of the ...
The Stars education kit - Student activities 11-20
... Lying between the Southern Cross and the False Cross is the most luminous and massive star in our Milky Way Galaxy – Eta Carinae. It radiates five million times more brightly than the Sun and is about 120 times more massive. It sheds about two Earth masses each day in its stellar wind. If the Sun ga ...
... Lying between the Southern Cross and the False Cross is the most luminous and massive star in our Milky Way Galaxy – Eta Carinae. It radiates five million times more brightly than the Sun and is about 120 times more massive. It sheds about two Earth masses each day in its stellar wind. If the Sun ga ...
The Transit Method
... 1. Grazing eclipse by a main sequence star: One should be able to distinguish these from the light curve shape and secondary eclipses, but this is often difficult with low signal to noise These are easy to exclude with Radial Velocity measurements as the amplitudes should be tens km/s (2–3 observati ...
... 1. Grazing eclipse by a main sequence star: One should be able to distinguish these from the light curve shape and secondary eclipses, but this is often difficult with low signal to noise These are easy to exclude with Radial Velocity measurements as the amplitudes should be tens km/s (2–3 observati ...
CHAPTER 7—ATOMS AND STARLIGHT
... a. As the train approaches, the horn will sound lower in pitch than when it is moving away. b. As the train approaches, the horn will sound higher in pitch than when it is moving away. c. There will be no change in the pitch of the horn as it moves by. d. The horn will get louder as the train moves ...
... a. As the train approaches, the horn will sound lower in pitch than when it is moving away. b. As the train approaches, the horn will sound higher in pitch than when it is moving away. c. There will be no change in the pitch of the horn as it moves by. d. The horn will get louder as the train moves ...
First Stars II
... (H burning via CN cycle at several x10Msun) Accretion continues in low Mdot cases, while the stellar ...
... (H burning via CN cycle at several x10Msun) Accretion continues in low Mdot cases, while the stellar ...
interactive.hr.diagram
... To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal axis of an H-R Diagram? ...
... To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal axis of an H-R Diagram? ...
Neutron Stars and Black Holes
... second 50 light years from Earth are discovered. How much fainter does the farther star appear to be? A. square root of 10 B. 10 C. 100 D. 1,000 E. the farther star does not appear fainter, since it is ...
... second 50 light years from Earth are discovered. How much fainter does the farther star appear to be? A. square root of 10 B. 10 C. 100 D. 1,000 E. the farther star does not appear fainter, since it is ...
What is a standard candle?
... second 50 light years from Earth are discovered. How much fainter does the farther star appear to be? A. square root of 10 B. 10 C. 100 D. 1,000 E. the farther star does not appear fainter, since it is ...
... second 50 light years from Earth are discovered. How much fainter does the farther star appear to be? A. square root of 10 B. 10 C. 100 D. 1,000 E. the farther star does not appear fainter, since it is ...
Document
... Solar bisectors take on a „C“ shape due to more flux and more area of rising part of convective cells. There is considerable variations with limb angle due to the change of depth of formation and the view angle. The line profiles themselves become shallower and wider towards the limb. ...
... Solar bisectors take on a „C“ shape due to more flux and more area of rising part of convective cells. There is considerable variations with limb angle due to the change of depth of formation and the view angle. The line profiles themselves become shallower and wider towards the limb. ...
A Collection of Curricula for the STARLAB Deep Sky Objects
... Nebulae absorb light from nearby stars and radiate it back into space. Most nebulae glow red, the color of hydrogen gas. The brightest nebula is the Orion Nebula (see slide #60) which can be seen with the unaided eye in a dark sky. Nebulae are very important in astronomy because they are the key to ...
... Nebulae absorb light from nearby stars and radiate it back into space. Most nebulae glow red, the color of hydrogen gas. The brightest nebula is the Orion Nebula (see slide #60) which can be seen with the unaided eye in a dark sky. Nebulae are very important in astronomy because they are the key to ...
Westerlund 1 : A Super-Star Cluster within the Milky Way
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.