San Pedro Mártir observations of microvariability in obscured quasars
... variations as computed using the approach by Heidt & Wagner (1996) are comparable to the other quantitative measurements of microvariability (Romero et al. 1999). It is highly unlikely that our measurements are affected by systematics because possible effects would also affect the comparison stars, ...
... variations as computed using the approach by Heidt & Wagner (1996) are comparable to the other quantitative measurements of microvariability (Romero et al. 1999). It is highly unlikely that our measurements are affected by systematics because possible effects would also affect the comparison stars, ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... The [C ii] line was placed at the center of the reference spectral window (spw0), assuming the redshift derived from optical lines (z = 4.593; Wu et al. 2012); the other three spectral windows probing the continuum blue-ward of the line. The on-source integration time was 956 s in array configuratio ...
... The [C ii] line was placed at the center of the reference spectral window (spw0), assuming the redshift derived from optical lines (z = 4.593; Wu et al. 2012); the other three spectral windows probing the continuum blue-ward of the line. The on-source integration time was 956 s in array configuratio ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... This energy loss can be compensated for by increasing the rate of fusion reac=ons, un=l an Fe core is formed. The only way in which internal energy can be generated in this core is for grav ...
... This energy loss can be compensated for by increasing the rate of fusion reac=ons, un=l an Fe core is formed. The only way in which internal energy can be generated in this core is for grav ...
Volcanoes and Igneous Activity Earth
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plan ...
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plan ...
Globular Clusters - Lick Observatory
... •Telescope size doubled from left to right. Credited to Astrometry ...
... •Telescope size doubled from left to right. Credited to Astrometry ...
The Milky Way – A Classic Galaxy
... How Did the Milky Way Form? • More on galaxy formation later, but briefly… • Gravity pulled together several, smaller “proto galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular mom ...
... How Did the Milky Way Form? • More on galaxy formation later, but briefly… • Gravity pulled together several, smaller “proto galaxies” which had already formed stars, and schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular mom ...
lecture1
... – Galileo’s observations of sun spots proved that the heavens are not time-invariant – Hubble’s measurement of galaxy redshifts showed that the Universe is not static – High speed motions of stars in galaxies show that either we do not understand gravity or that there is a large amount of “dark matt ...
... – Galileo’s observations of sun spots proved that the heavens are not time-invariant – Hubble’s measurement of galaxy redshifts showed that the Universe is not static – High speed motions of stars in galaxies show that either we do not understand gravity or that there is a large amount of “dark matt ...
December 15th 2016 - Newcastle Astronomical Society
... viewing but there are opportunities to see it. It might be possible to glimpse its return to the morning sky, low in the South East, before sunrise, on the 31st. ...
... viewing but there are opportunities to see it. It might be possible to glimpse its return to the morning sky, low in the South East, before sunrise, on the 31st. ...
Slide 1 - Typepad
... Accessibility to darkness of the night sky Milky way only visible wth moderately dark skies Faint objects like clusters of stars, ane even galaxies an be naked eye objects with very dark skies not even visible in a telescope from moderately dark skies When we are in the phase of the moon from First ...
... Accessibility to darkness of the night sky Milky way only visible wth moderately dark skies Faint objects like clusters of stars, ane even galaxies an be naked eye objects with very dark skies not even visible in a telescope from moderately dark skies When we are in the phase of the moon from First ...
Stars - PAMS-Doyle
... Types of Galaxies • Spiral Galaxies: Spiral shaped with normal spirals and barred spirals • Elliptical Galaxies: not flattened into a disk shape, no arms, similar to a football in shape • Irregular Galaxies: no distinct shape • Most galaxies are located in groups ...
... Types of Galaxies • Spiral Galaxies: Spiral shaped with normal spirals and barred spirals • Elliptical Galaxies: not flattened into a disk shape, no arms, similar to a football in shape • Irregular Galaxies: no distinct shape • Most galaxies are located in groups ...
AST1100 Lecture Notes
... From our own solar system, it seems that the total matter is dominated by the Sun, not the planets. The total mass of the planets only make up about one part in 1000 of the total mass of the solar system. If this is the normal ratio, and we have no reason to believe otherwise, then the planets can o ...
... From our own solar system, it seems that the total matter is dominated by the Sun, not the planets. The total mass of the planets only make up about one part in 1000 of the total mass of the solar system. If this is the normal ratio, and we have no reason to believe otherwise, then the planets can o ...
the printable Hartness House Workshop Schedule in pdf
... Robo-AO is the first and only fully automated adaptive optics laser guide star adaptive optics (AO) instrument. It was developed as an instrument for 1-3m robotic telescopes, in order to take advantage of their availability to pursue large survey programs and target of opportunity observations that ...
... Robo-AO is the first and only fully automated adaptive optics laser guide star adaptive optics (AO) instrument. It was developed as an instrument for 1-3m robotic telescopes, in order to take advantage of their availability to pursue large survey programs and target of opportunity observations that ...
Powerpoint
... stars. • RR Lyrae stars all have about the same luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and ...
... stars. • RR Lyrae stars all have about the same luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and ...
AST1001.ch1
... • at an average distance of 1 AU ≈ 150 million km. • with Earth’s axis tilted by 23.5º (pointing to Polaris). • and rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
... • at an average distance of 1 AU ≈ 150 million km. • with Earth’s axis tilted by 23.5º (pointing to Polaris). • and rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
PDF of story and photos
... tails formed from a collision with another asteroid. A collision would cause a large cloud of dust to blast into space all at once. A series of Hubble telescope images, taken over five months, has not shown that type of catastrophic event. Instead, calculations show that the tails could have formed ...
... tails formed from a collision with another asteroid. A collision would cause a large cloud of dust to blast into space all at once. A series of Hubble telescope images, taken over five months, has not shown that type of catastrophic event. Instead, calculations show that the tails could have formed ...
Nov 2009
... On the axes of the Hertzsprung–Russell diagram above, draw the approximate region in which Cepheid variable stars are located. ...
... On the axes of the Hertzsprung–Russell diagram above, draw the approximate region in which Cepheid variable stars are located. ...
No. 35 - Institute for Astronomy
... the door to this new way of learning about them. My research group is leading an international effort known as the Gemini NICI Planet-Finding Campaign to expand the census of exoplanets detected by direct imaging. NICI (the Near-Infrared Coronagraphic Imager) is a powerful new instrument installed o ...
... the door to this new way of learning about them. My research group is leading an international effort known as the Gemini NICI Planet-Finding Campaign to expand the census of exoplanets detected by direct imaging. NICI (the Near-Infrared Coronagraphic Imager) is a powerful new instrument installed o ...
Chapter 18 - the Universe Begins
... exist. (Interestingly, slightly more matter than anti-matter was formed, so that most of the matter we detect now is not anti-matter.) By the first second after the Big Bang, the fundamental particles of matter had formed. Protons, neutrons and electrons existed. By three seconds old, the Universe c ...
... exist. (Interestingly, slightly more matter than anti-matter was formed, so that most of the matter we detect now is not anti-matter.) By the first second after the Big Bang, the fundamental particles of matter had formed. Protons, neutrons and electrons existed. By three seconds old, the Universe c ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.