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... from the photometric observations of Bergeron et al. (1997, hereafter BRL97), places this candidate inside our region of interest, within the uncertainties. We also include two DA stars from the spectroscopic analysis of Gianninas et al. (2011), L796-10 (0053−117) and GD 25 (0213+396), whose distanc ...
... from the photometric observations of Bergeron et al. (1997, hereafter BRL97), places this candidate inside our region of interest, within the uncertainties. We also include two DA stars from the spectroscopic analysis of Gianninas et al. (2011), L796-10 (0053−117) and GD 25 (0213+396), whose distanc ...
Chapter 1 Telescopes 1.1 Lenses
... This is why many more stars are seen using a telescope than using the unaided eye. The greater the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars whic ...
... This is why many more stars are seen using a telescope than using the unaided eye. The greater the diameter of the objective of a telescope, the greater the number of stars that can be seen. Planets and other astronomical objects in the solar system are magnified using a telescope (unlike stars whic ...
Activity III: Calibrating Images
... Counts - The measure of light that each pixel of the CCD receives from the star. This measurement is particular to the equipment used and to the atmospheric conditions during the observation. When we display an image, the grayness or color at each pixel is based on the Counts for that pixel. Appare ...
... Counts - The measure of light that each pixel of the CCD receives from the star. This measurement is particular to the equipment used and to the atmospheric conditions during the observation. When we display an image, the grayness or color at each pixel is based on the Counts for that pixel. Appare ...
Building galaxies Hunt, Leslie Kipp
... conjectured that “There may be innumerable spheres of this kind or starry heavens in the finite universe”. Thomas Wright of Durham, England, a few years after, interpreted the observations at that time of “the many cloudy Spots, just perceivable by us, as far without our starry Regions”. This idea w ...
... conjectured that “There may be innumerable spheres of this kind or starry heavens in the finite universe”. Thomas Wright of Durham, England, a few years after, interpreted the observations at that time of “the many cloudy Spots, just perceivable by us, as far without our starry Regions”. This idea w ...
Mergers of massive main sequence binaries
... stragglers to be hot and luminous stars that cannot be explained with canonical single star evolution models2 . Using a pre-calculated grid of binary models, we determined the composition of merger products for a wide range of binaries with the assumption of no mass loss and homogeneous mixing durin ...
... stragglers to be hot and luminous stars that cannot be explained with canonical single star evolution models2 . Using a pre-calculated grid of binary models, we determined the composition of merger products for a wide range of binaries with the assumption of no mass loss and homogeneous mixing durin ...
Cassiopeia Kelly Pearce
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
Emission from dust in galaxies: Metallicity dependence
... (Sects. 7.2 and 7.3 of S78). Here, we apply these values to H ii regions. That is, we assume that the dust-to-gas ratio in the H ii region is the same as that in the mean value in the interstellar space. Then, Eq. (4) reduces to ...
... (Sects. 7.2 and 7.3 of S78). Here, we apply these values to H ii regions. That is, we assume that the dust-to-gas ratio in the H ii region is the same as that in the mean value in the interstellar space. Then, Eq. (4) reduces to ...
Is $^ 6$ Li in metal-poor halo stars produced in situ by solar
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
Summary of Talks at Growing Black Holes 2004 in Garching
... -> High resolution CO observations of the object resolve it spatially into two peaks. It also resolved in velocity space, with a CO line width of 280 km/s and a bulge mass estimate of 1e10 solar masses within 2kpc, which is lower than expected from M sigma relation. Is this object not fully assemble ...
... -> High resolution CO observations of the object resolve it spatially into two peaks. It also resolved in velocity space, with a CO line width of 280 km/s and a bulge mass estimate of 1e10 solar masses within 2kpc, which is lower than expected from M sigma relation. Is this object not fully assemble ...
Proficiency Step #5--
... Cygnus, and Altair in Aquilla). The Coathanger asterism (officially called Brocchi’s cluster) is very small and not at all noticeable with the naked eye—but easily viewed through binoculars. It is located about 1/3 of the way from Altair to Vega in the summer triangle in the constellation Vulpecula. ...
... Cygnus, and Altair in Aquilla). The Coathanger asterism (officially called Brocchi’s cluster) is very small and not at all noticeable with the naked eye—but easily viewed through binoculars. It is located about 1/3 of the way from Altair to Vega in the summer triangle in the constellation Vulpecula. ...
ASTRONOMICAL BINOCULARS
... latitude at which you are standing on Earth. EPHEMERIS - The ephemeris of a planet or the sun or the moon is a table giving the coordinates of the object at regular intervals of time. The coordinates will be listed using declination and right ascension. Other information such as distance and magnitu ...
... latitude at which you are standing on Earth. EPHEMERIS - The ephemeris of a planet or the sun or the moon is a table giving the coordinates of the object at regular intervals of time. The coordinates will be listed using declination and right ascension. Other information such as distance and magnitu ...
Near-Earth Asteroid Search Programs
... increases away from opposition due to the longer line of sight through higher-density regions of NEOs. The negative aspects of such a search include observing through greater air mass and less favorable solar phase angles. Each of these effects should be considered, and each varies system to system ...
... increases away from opposition due to the longer line of sight through higher-density regions of NEOs. The negative aspects of such a search include observing through greater air mass and less favorable solar phase angles. Each of these effects should be considered, and each varies system to system ...
Constraints on Long-Period Planets from an L
... of planets in general without information on long period extrasolar planets; nor can we see how our own solar system fits into the big picture of planet formation in the galaxy without a good census of planets in Jupiter- and Saturn-like long-period orbits around other stars. Several methods (transi ...
... of planets in general without information on long period extrasolar planets; nor can we see how our own solar system fits into the big picture of planet formation in the galaxy without a good census of planets in Jupiter- and Saturn-like long-period orbits around other stars. Several methods (transi ...
CFBDSIR J1458+ 1013B: A Very Cold (> T10) Brown Dwarf in a
... data themselves; given the large flux ratio of the binary, a scaled and shifted version of the primary star provides an excellent simulation of the data (e.g. Dupuy et al. 2009b). For each filter, our fitting code was applied to artificial binaries with similar separations and flux ratios as CFBDSIR ...
... data themselves; given the large flux ratio of the binary, a scaled and shifted version of the primary star provides an excellent simulation of the data (e.g. Dupuy et al. 2009b). For each filter, our fitting code was applied to artificial binaries with similar separations and flux ratios as CFBDSIR ...
The Most Luminous Protostars in Molecular Clouds: A Hint to
... 2 complex regions in the LMC, we adopted CO data with a higher angular resolution taken using the SEST 15 m telescope to sample 21 GMCs (Caldwell, Kutner 1996; Kutner et al. 1997). The masses of all the GMCs collected here range from 104 M to 106 M . In order to evaluate the influence of H II regi ...
... 2 complex regions in the LMC, we adopted CO data with a higher angular resolution taken using the SEST 15 m telescope to sample 21 GMCs (Caldwell, Kutner 1996; Kutner et al. 1997). The masses of all the GMCs collected here range from 104 M to 106 M . In order to evaluate the influence of H II regi ...
Nebulae.The Lagoon and Dumbbell Nebulae
... In the space between the stars (also called interstellar medium) there is interstellar matter with different density. On some places, clouds of dust, hydrogen and plasma are being formed. They can be seen under certain circumstances. These objects are called nebulae. Nebulae are interstellar clouds ...
... In the space between the stars (also called interstellar medium) there is interstellar matter with different density. On some places, clouds of dust, hydrogen and plasma are being formed. They can be seen under certain circumstances. These objects are called nebulae. Nebulae are interstellar clouds ...
Spectral classification of O–M stars on the basis of UBV photometry
... In the process of spectral classification, about 60% of analyzed stars have been assigned to a single or two rather close estimates of spectra. In the last case an average value was adopted. Another 40% of stars have obtained two substantially different estimates of spectra. Double results of the cl ...
... In the process of spectral classification, about 60% of analyzed stars have been assigned to a single or two rather close estimates of spectra. In the last case an average value was adopted. Another 40% of stars have obtained two substantially different estimates of spectra. Double results of the cl ...
Period analysis of variable stars by robust smoothing
... SuperSmoother and cosine method, the middle panel illustrates the fits using a smoothing spline and robust smoothing spline regression, and the bottom panel shows the fits based on two other robust smoothing methods described in Section 3 for comparison. All fitting methods have been used with optim ...
... SuperSmoother and cosine method, the middle panel illustrates the fits using a smoothing spline and robust smoothing spline regression, and the bottom panel shows the fits based on two other robust smoothing methods described in Section 3 for comparison. All fitting methods have been used with optim ...
ULXs: General Properties and Variability - X
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
Night Sky Observations
... Sky Watching is a casual term used to describe people going outside during the night and looking at objects in the sky. It is part of Astronomy, but on a more practical level. It is not something done by professional astronomers, but more so by amateurs. Most amateurs start off with sky watching, an ...
... Sky Watching is a casual term used to describe people going outside during the night and looking at objects in the sky. It is part of Astronomy, but on a more practical level. It is not something done by professional astronomers, but more so by amateurs. Most amateurs start off with sky watching, an ...
PDF
... class. These share the disk-like structure of spirals with an inner nuclear bulge, but are devoid of spiral arms and share the smoothness and colours of the elliptical population. Over 90% of nearby luminous galaxies can be categorized within Hubble’s scheme, described in more detail by van den Berg ...
... class. These share the disk-like structure of spirals with an inner nuclear bulge, but are devoid of spiral arms and share the smoothness and colours of the elliptical population. Over 90% of nearby luminous galaxies can be categorized within Hubble’s scheme, described in more detail by van den Berg ...
ASPEN WORKSHOP 2003
... 204 B dropouts since ACS data are deep; 20 V dropouts and 9 I dropouts but of course this is tricky based on only 1 band! Z assumed, modest decline in size: at 1500—1700Ang Petrosian radius (half light radius divided by 2.6), broadly centered on 1 Kpc, z evolution (from 2 to 1 arcsec) consistent wit ...
... 204 B dropouts since ACS data are deep; 20 V dropouts and 9 I dropouts but of course this is tricky based on only 1 band! Z assumed, modest decline in size: at 1500—1700Ang Petrosian radius (half light radius divided by 2.6), broadly centered on 1 Kpc, z evolution (from 2 to 1 arcsec) consistent wit ...
3D Tour of the Universe Template
... regions, resulting in the formation of new young stars. As is common in these kinds of encounters, spiral structure was induced in the more massive galaxy. M51 is an easily found astronomical showpiece if the sky is dark, where suggestions of its spiral arms may be visible. As is also common with th ...
... regions, resulting in the formation of new young stars. As is common in these kinds of encounters, spiral structure was induced in the more massive galaxy. M51 is an easily found astronomical showpiece if the sky is dark, where suggestions of its spiral arms may be visible. As is also common with th ...
Understanding the Astrophysics of Galaxy Evolution: the role of
... forming stars very rapidly, and that supernovae were driving significant outflows. Since then, the race to claim the record for the highest redshift object has absorbed many in the field. Today, this record stands at z = 6.96. These distant objects appear as tiny smudges in the deepest HST imaging d ...
... forming stars very rapidly, and that supernovae were driving significant outflows. Since then, the race to claim the record for the highest redshift object has absorbed many in the field. Today, this record stands at z = 6.96. These distant objects appear as tiny smudges in the deepest HST imaging d ...
Parallax
... standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this exercise, we investigate the use of the measured parallax met ...
... standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this exercise, we investigate the use of the measured parallax met ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.