Astrophysics Lab “A”
... A first series of spectra consists of observations performed with the IUE (International Ultraviolet Explorer) satellite, one of the most important (earlier) instruments for the wind diagnostics of hot stars, and displays Galactic objects. A second series displays UV-spectra from typical stars in th ...
... A first series of spectra consists of observations performed with the IUE (International Ultraviolet Explorer) satellite, one of the most important (earlier) instruments for the wind diagnostics of hot stars, and displays Galactic objects. A second series displays UV-spectra from typical stars in th ...
Our Local Group of Galaxies
... How complete is the list of Milky Way dSph companions? • Grey area shows region of the sky covered in Data Release 6 of the SDSS. Previously known MW satellites are marked in blue, new discoveries in red. Solid black line and middle grey stripe are at declination zero - inside is the region to be s ...
... How complete is the list of Milky Way dSph companions? • Grey area shows region of the sky covered in Data Release 6 of the SDSS. Previously known MW satellites are marked in blue, new discoveries in red. Solid black line and middle grey stripe are at declination zero - inside is the region to be s ...
HR Diagram
... In addition to the isoradius lines, check show luminosity classes. This green region (dwarfs V) is known as the main sequence and contains all stars that are fusing hydrogen into helium as their primary energy source. Over 90% of all stars fall in this region on the HR diagram. Move the active curso ...
... In addition to the isoradius lines, check show luminosity classes. This green region (dwarfs V) is known as the main sequence and contains all stars that are fusing hydrogen into helium as their primary energy source. Over 90% of all stars fall in this region on the HR diagram. Move the active curso ...
Summer 2004 ISP 205: Visions of the Universe Professor: ER Capriotti Sample Questions
... 14. Aristarchus decided that the Sun was bigger than the Moon because he knew that the sun A. appears much larger in the sky than the Moon. B. is farther than the moon, but appears the same size. C. is the center of the solar system. D. appears to move more slowly than the Moon. 15. Aristarchus est ...
... 14. Aristarchus decided that the Sun was bigger than the Moon because he knew that the sun A. appears much larger in the sky than the Moon. B. is farther than the moon, but appears the same size. C. is the center of the solar system. D. appears to move more slowly than the Moon. 15. Aristarchus est ...
Astronomy 112: The Physics of Stars Class 16 Notes: Post
... since the core collapses on a KH timescale. For this reason we only see fairly low mass stars on the sub-giant branch. More massive stars cross it too rapidly for us to have any chance of finding one. There is a limit to how red a star can get, which we encountered last time during our discussion of ...
... since the core collapses on a KH timescale. For this reason we only see fairly low mass stars on the sub-giant branch. More massive stars cross it too rapidly for us to have any chance of finding one. There is a limit to how red a star can get, which we encountered last time during our discussion of ...
2_ISM - UCT Astronomy Department
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
Milky Way inner halo reveals its age | COSMOS magazine
... Using this method, he estimated that the stars in the inner halo of the Milky Way are 11.4 billion years old, which is within the range of previous estimates of 10 to 14 billion years. The oldest reliably aged cluster of stars in the outer halo region to date is 13.5 billion years old. White dwarf s ...
... Using this method, he estimated that the stars in the inner halo of the Milky Way are 11.4 billion years old, which is within the range of previous estimates of 10 to 14 billion years. The oldest reliably aged cluster of stars in the outer halo region to date is 13.5 billion years old. White dwarf s ...
Exploration of the Milky Way and Nearby galaxies
... Many potentially interesting stars are too faint (V > 13) for current 8 -10m tel Relevant absorption lines are weak, High precision, high spectral resolution data (R ~ 50000, SNR ~ 100) Long exposure time, ( HE 1327-2326: with VLT/UVES, exp time ~ 18 hrs) ...
... Many potentially interesting stars are too faint (V > 13) for current 8 -10m tel Relevant absorption lines are weak, High precision, high spectral resolution data (R ~ 50000, SNR ~ 100) Long exposure time, ( HE 1327-2326: with VLT/UVES, exp time ~ 18 hrs) ...
1. Chapter 10
... tried to explain what they saw. To them, the sky looked like an upsidedown bowl and the stars were like points of light fixed on this bowl. They noticed that the stars made certain patterns. Those patterns are called constellations, from the Latin phrase meaning “with stars.” The people told stories ...
... tried to explain what they saw. To them, the sky looked like an upsidedown bowl and the stars were like points of light fixed on this bowl. They noticed that the stars made certain patterns. Those patterns are called constellations, from the Latin phrase meaning “with stars.” The people told stories ...
spie_poster1 - UMD Physics
... investigate the dynamics, physical and chemical properties of extended objects like supernova remnants, planetary nebula and h Carinae. We describe it's general properties and capabilities. ...
... investigate the dynamics, physical and chemical properties of extended objects like supernova remnants, planetary nebula and h Carinae. We describe it's general properties and capabilities. ...
... 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 ...
Supermassive Black Holes in Inactive Galaxies Encyclopedia of Astronomy & Astrophysics eaa.iop.org
... BH masses are M• ~ 106–109.5M⊙. A wide array of phenomena can be understood within this picture. However, the subject has had an outstanding problem: there was no dynamical evidence that BHs exist. The search for BHs has therefore become one of the hottest topics in extragalactic astronomy. Since mo ...
... BH masses are M• ~ 106–109.5M⊙. A wide array of phenomena can be understood within this picture. However, the subject has had an outstanding problem: there was no dynamical evidence that BHs exist. The search for BHs has therefore become one of the hottest topics in extragalactic astronomy. Since mo ...
PDF file - Memorie della SAIt
... are commonly observed in the galactic halo. At variance with the C(N) stars commonly observed in the galactic disk, the halo C-rich stars are usually also N-rich. They are dwarfs or giants, but not AGBs. Their composition is probably due to a mass transfer process from an AGB companion. Many of thes ...
... are commonly observed in the galactic halo. At variance with the C(N) stars commonly observed in the galactic disk, the halo C-rich stars are usually also N-rich. They are dwarfs or giants, but not AGBs. Their composition is probably due to a mass transfer process from an AGB companion. Many of thes ...
cohen_paris_v2_may2009 - Astronomy at Swarthmore College
... Conclusions, pt. 2 Magnetic massive stars have harder spectra with narrower lines and rotationally modulated variability, in general agreement with MHD simulations. Line ratio diagnostics are useful for localizing the hot plasma, and indicate that the MHD simulations predict a location that is too ...
... Conclusions, pt. 2 Magnetic massive stars have harder spectra with narrower lines and rotationally modulated variability, in general agreement with MHD simulations. Line ratio diagnostics are useful for localizing the hot plasma, and indicate that the MHD simulations predict a location that is too ...
File
... arms on the opposite side from the prominent arm are defined primarily by spiral dust lanes.” (“NGC 772, an unbarred spiral galaxy in Aries”). Also found within the borders of Aries is a pair of galaxies, NGC 678 and NGC 680 (image # 4) both are apart of the group called NGC 691 both galaxies are lo ...
... arms on the opposite side from the prominent arm are defined primarily by spiral dust lanes.” (“NGC 772, an unbarred spiral galaxy in Aries”). Also found within the borders of Aries is a pair of galaxies, NGC 678 and NGC 680 (image # 4) both are apart of the group called NGC 691 both galaxies are lo ...
Lecture17-ASTA01
... Kepler mission discovered numerous large, hot, Jupiter-like planets around their stars, is being used to confirm the Kepler telescope findings. ...
... Kepler mission discovered numerous large, hot, Jupiter-like planets around their stars, is being used to confirm the Kepler telescope findings. ...
Penentuan Jarak dalam Astronomi II
... (a) More massive star B evolves more quickly, it becomes a red giant and loses mass through L1 point; after a while it becomes the White Dwarf star (b) Main Sequence star A gains the mass and becomes more massive; after a while it loses its mass to WD satellite Mass transfer in a close binary syste ...
... (a) More massive star B evolves more quickly, it becomes a red giant and loses mass through L1 point; after a while it becomes the White Dwarf star (b) Main Sequence star A gains the mass and becomes more massive; after a while it loses its mass to WD satellite Mass transfer in a close binary syste ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.