1 The Hubble Story (10:56)
... Hubble has also measured the mass of a planet – only the second time such a calculation has been performed with any accuracy – by detecting the way in which the planet causes its star to wobble. Hubble also found the oldest planet so far discovered. The planet orbits a tiny stellar husk, which was o ...
... Hubble has also measured the mass of a planet – only the second time such a calculation has been performed with any accuracy – by detecting the way in which the planet causes its star to wobble. Hubble also found the oldest planet so far discovered. The planet orbits a tiny stellar husk, which was o ...
SUB-KILOPARSEC IMAGING OF COOL MOLECULAR GAS IN
... We present spatially-resolved imaging obtained with the Australia Telescope Compact Array (ATCA) of three CO lines in two high-redshift gravitationally lensed dusty star-forming galaxies, discovered by the South Pole Telescope. Strong lensing allows us to probe the structure and dynamics of the mole ...
... We present spatially-resolved imaging obtained with the Australia Telescope Compact Array (ATCA) of three CO lines in two high-redshift gravitationally lensed dusty star-forming galaxies, discovered by the South Pole Telescope. Strong lensing allows us to probe the structure and dynamics of the mole ...
Stellar evolution - Statistical Physics Group
... that clusters of stars which form physically homogeneous groups have much better defined H R diagrams than an arbitrary group of field stars. Furthermore, since the dimensions of the clusters are usually small compared with their distances from the Earth it is a good approximation to suppose that al ...
... that clusters of stars which form physically homogeneous groups have much better defined H R diagrams than an arbitrary group of field stars. Furthermore, since the dimensions of the clusters are usually small compared with their distances from the Earth it is a good approximation to suppose that al ...
AR2012 - Vatican Observatory
... from Star Cluster Ecology to Tracers of Galaxy Evolution. In 1985, the late Fr. Martin McCarthy S.J., an astronomer at the Observatory, recognized that there was too little contact between the astronomers at the Observatory and younger researchers. His solution was to open the observatory to student ...
... from Star Cluster Ecology to Tracers of Galaxy Evolution. In 1985, the late Fr. Martin McCarthy S.J., an astronomer at the Observatory, recognized that there was too little contact between the astronomers at the Observatory and younger researchers. His solution was to open the observatory to student ...
ROSAT Ian R. Stevens* and David K. Strickland*
... superimposed on the Digitized Sky Survey image. The X-ray contours are from the longer 6.2-ks observation only. As noted by Turner et al. (1993), there are several point sources in the vicinity of the nucleus of NGC 1365. In addition to a strong central point source there is also low-surface-brightn ...
... superimposed on the Digitized Sky Survey image. The X-ray contours are from the longer 6.2-ks observation only. As noted by Turner et al. (1993), there are several point sources in the vicinity of the nucleus of NGC 1365. In addition to a strong central point source there is also low-surface-brightn ...
Introduction_to_pulsar_astronomy
... In the 1940’s, it was found that the supernova event that resulted in the Crab Nebula was witnessed by Chinese astronomers in the year 1054. Radio emission from the Crab nebula was first detected by Bolton, Stanley and Slee (1949). It is one of the most powerful radio sources known, with a flux of 1 ...
... In the 1940’s, it was found that the supernova event that resulted in the Crab Nebula was witnessed by Chinese astronomers in the year 1054. Radio emission from the Crab nebula was first detected by Bolton, Stanley and Slee (1949). It is one of the most powerful radio sources known, with a flux of 1 ...
November Celestial Calendar by Dave Mitsky All times are UT
... through southern Aries. It lies a bit more than two degrees south of the sixth-magnitude star 19 Arietis on the nights of November 11 and November 12. Asteroid 216 Kleopatra is at opposition in Taurus on November 16. For information on this year’s bright asteroids and upcoming asteroid occultation e ...
... through southern Aries. It lies a bit more than two degrees south of the sixth-magnitude star 19 Arietis on the nights of November 11 and November 12. Asteroid 216 Kleopatra is at opposition in Taurus on November 16. For information on this year’s bright asteroids and upcoming asteroid occultation e ...
- Isaac Newton Group of Telescopes
... clusters: 100 million years approximately, with a margin of error below 30%. It was the first time that the age of a celestial object of this nature had been so accurately determined, overcoming one of the most important restrictions preventing the true substellar nature of brown dwarf candidates t ...
... clusters: 100 million years approximately, with a margin of error below 30%. It was the first time that the age of a celestial object of this nature had been so accurately determined, overcoming one of the most important restrictions preventing the true substellar nature of brown dwarf candidates t ...
Star formation rates and efficiencies in the Galactic Centre
... a difficult quantity to determine, as inferences of the threedimensional structure have to be made in order to convert two-dimensional line-of-sight column density measurements. The measured column density of hydrogen in the CMZ appears to be at least an order of magnitude higher than clouds within ...
... a difficult quantity to determine, as inferences of the threedimensional structure have to be made in order to convert two-dimensional line-of-sight column density measurements. The measured column density of hydrogen in the CMZ appears to be at least an order of magnitude higher than clouds within ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... In this thesis, we explore 7.5 billion years of evolution in cluster galaxy star formation activity using a sample of 11 high-redshift (1 < z < 1.5) clusters from the IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. W ...
... In this thesis, we explore 7.5 billion years of evolution in cluster galaxy star formation activity using a sample of 11 high-redshift (1 < z < 1.5) clusters from the IRAC Shallow Cluster Survey, and 25 low-redshift (0.15 < z < 1) clusters from The Cluster Lensing And Supernova survey with Hubble. W ...
The formation of disc galaxies in high-resolution moving
... by the numerical scheme employed for solving hydrodynamics, as emphasized recently (Kereš et al. 2012; Sijacki et al. 2012; Torrey et al. 2012; Vogelsberger et al. 2012). These studies have shown that accuracy differences between smoothed particle hydrodynamics (SPH, as implemented in the GADGET co ...
... by the numerical scheme employed for solving hydrodynamics, as emphasized recently (Kereš et al. 2012; Sijacki et al. 2012; Torrey et al. 2012; Vogelsberger et al. 2012). These studies have shown that accuracy differences between smoothed particle hydrodynamics (SPH, as implemented in the GADGET co ...
12-1 - Piscataway High School
... can emit astonishing different amounts of energy. The most luminous emit at least a billion times more energy per second than the least luminous. Clearly, the family of stars contains some interesting characters. ...
... can emit astonishing different amounts of energy. The most luminous emit at least a billion times more energy per second than the least luminous. Clearly, the family of stars contains some interesting characters. ...
Chandra Characterization of X-ray Emission in the Young F
... The total program observing time was 39 ksec, and the total on-target observing time was 37.3 ksec, in which 1509 total raw photons were detected using a source extraction radius of 20ʺ and an energy filter in the range 0.3-2.0 keV. The extraction region was centered halfway between the two resolved ...
... The total program observing time was 39 ksec, and the total on-target observing time was 37.3 ksec, in which 1509 total raw photons were detected using a source extraction radius of 20ʺ and an energy filter in the range 0.3-2.0 keV. The extraction region was centered halfway between the two resolved ...
Comparing stars - The Open University
... than the Sun, and appears bluish-white. It has the greatest apparent visual brightness (most negative apparent visual magnitude!) of any star in the night sky. This is, as we have seen, not because it is very luminous, but because it is both fairly luminous and rather close - at 2.63 pc it's the sev ...
... than the Sun, and appears bluish-white. It has the greatest apparent visual brightness (most negative apparent visual magnitude!) of any star in the night sky. This is, as we have seen, not because it is very luminous, but because it is both fairly luminous and rather close - at 2.63 pc it's the sev ...
Sky Watcher - Boise Astronomical Society
... This month look for the star Denebola, the “Tail of the Lion”. Denebola lies 36 light years away, so if you were born in 1978, then Denebola is your birthday star this year. Denebola is the 3 rd brightest star in the Zodiac, so it’s very visible from town. Denebola is young in star years. At 400 mil ...
... This month look for the star Denebola, the “Tail of the Lion”. Denebola lies 36 light years away, so if you were born in 1978, then Denebola is your birthday star this year. Denebola is the 3 rd brightest star in the Zodiac, so it’s very visible from town. Denebola is young in star years. At 400 mil ...
Colloquial Jakartan Indonesian
... to offer a Proto Oceanic (POc) origin. Undoubtedly, as navigation skills developed and were refined in the Pacific, new terms would have been required, or old meanings extended. There is a further complication in that we are not dealing with one homogeneous environment. Take just one example—the nig ...
... to offer a Proto Oceanic (POc) origin. Undoubtedly, as navigation skills developed and were refined in the Pacific, new terms would have been required, or old meanings extended. There is a further complication in that we are not dealing with one homogeneous environment. Take just one example—the nig ...
The first carbon-enhanced metal-poor star found in the Sculptor
... patterns that suggest mass transfer from a companion in the AGB phase (Lucatello et al. 2005). Thus the C, N, O, and heavy elements for these stars do not reflect the ISM from which they were formed. The available data for CEMP-s stars is consistent with ∼100% binary fraction and a maximum period of ...
... patterns that suggest mass transfer from a companion in the AGB phase (Lucatello et al. 2005). Thus the C, N, O, and heavy elements for these stars do not reflect the ISM from which they were formed. The available data for CEMP-s stars is consistent with ∼100% binary fraction and a maximum period of ...
The physics and modes of star cluster formation: observations
... hindered by the fact that open clusters are born in molecular clouds and, during their formation and early evolution, are completely embedded in molecular gas and dust. They are thus obscured from view at optical wavelengths, where the traditional astronomical techniques are most effective. Fortunat ...
... hindered by the fact that open clusters are born in molecular clouds and, during their formation and early evolution, are completely embedded in molecular gas and dust. They are thus obscured from view at optical wavelengths, where the traditional astronomical techniques are most effective. Fortunat ...
Elliptical Galaxies
... where Re , the effective radius, is the radius that contains half the total light of the galaxy and Ie is the surface brightness (the amount of light from a square arc second of the galaxy) at Re . This law can be integrated to give a finite total light of Itot = 7.22πRe 2 Ie . de Vaucouleurs’ law, ...
... where Re , the effective radius, is the radius that contains half the total light of the galaxy and Ie is the surface brightness (the amount of light from a square arc second of the galaxy) at Re . This law can be integrated to give a finite total light of Itot = 7.22πRe 2 Ie . de Vaucouleurs’ law, ...
... 2449981. The phasing with Kholopov et al.’s (1987) period of 0.28779276 d gave a small displacements of the maximum light. A Phase Dispersion Minimization (PDM) analysis of our data produced a period of 0.288712 ± 0.000005 d. In the RRL data base of GEOS (2012) one can find a list of 96 times of max ...
the chandra deep field–north survey. xvii. evolution of
... characterize the X-ray emission from old high-latitude main-sequence Galactic stars. Our principal goal is to investigate the expected long-term decay of magnetic activity of late-type stars due to the gradual spin-down of stellar rotation from a magnetized stellar wind. Thirteen X-ray sources are a ...
... characterize the X-ray emission from old high-latitude main-sequence Galactic stars. Our principal goal is to investigate the expected long-term decay of magnetic activity of late-type stars due to the gradual spin-down of stellar rotation from a magnetized stellar wind. Thirteen X-ray sources are a ...
Studies of molecular clouds at the Galactic centre Roland Karlsson DECLINATION (B1950)
... winding of the spiral arms. However, intermediate classes also occur. A socalled grand design spiral galaxy is one where the spiral arms are well-defined. It is generally assumed that a central supermassive black hole (SMBH) resides at the dynamical centre of most spiral galaxies. Galaxies are obser ...
... winding of the spiral arms. However, intermediate classes also occur. A socalled grand design spiral galaxy is one where the spiral arms are well-defined. It is generally assumed that a central supermassive black hole (SMBH) resides at the dynamical centre of most spiral galaxies. Galaxies are obser ...
Selected observation targets at a glance per constellation
... yrs, one of the largest stars known, with an apparent diameter between 0.043 and 0.056”, part of two prominent winter asterisms: the Winter Triangle and the Winter Hexagon.The other two stars forming the Winter Triangle, also known as the Great Southern Triangle, are Sirius and Procyon, same stars a ...
... yrs, one of the largest stars known, with an apparent diameter between 0.043 and 0.056”, part of two prominent winter asterisms: the Winter Triangle and the Winter Hexagon.The other two stars forming the Winter Triangle, also known as the Great Southern Triangle, are Sirius and Procyon, same stars a ...
Chapter 5 The Evolutionary Paths Of Nearby Galaxies
... mag, and I adopt this value as the lower limit of the transition region. This colour cut corresponds to the 90th percentile of the colour of Hi-normal spirals with M∗ > 1010 M⊙ . Under this convention, M31 is defined as a Hi-normal galaxy belonging to the blue cloud (NUV − H ∼ 4.1 mag). I now define ...
... mag, and I adopt this value as the lower limit of the transition region. This colour cut corresponds to the 90th percentile of the colour of Hi-normal spirals with M∗ > 1010 M⊙ . Under this convention, M31 is defined as a Hi-normal galaxy belonging to the blue cloud (NUV − H ∼ 4.1 mag). I now define ...
Rotation Periods of Wide Binaries in the Kepler Field
... index are available in the archive for all but a few of the CPM stars. Furthermore, the color index, (gKIC − Ks ), has good sensitivity to stellar temperature over a wide range of spectral types and is widely available in various stellar archives. In the following, I will refer to these indices as “ ...
... index are available in the archive for all but a few of the CPM stars. Furthermore, the color index, (gKIC − Ks ), has good sensitivity to stellar temperature over a wide range of spectral types and is widely available in various stellar archives. In the following, I will refer to these indices as “ ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.