A Method of Correcting Near-Infrared Spectra for Telluric Absorption
... T(l) varies with air mass and on timescales of the order of several to tens of minutes (depending on the atmospheric conditions), it is clearly best to observe a telluric standard at an air mass as close as possible to that of the target object and within a few minutes of the observations of the tar ...
... T(l) varies with air mass and on timescales of the order of several to tens of minutes (depending on the atmospheric conditions), it is clearly best to observe a telluric standard at an air mass as close as possible to that of the target object and within a few minutes of the observations of the tar ...
The isotopic mixture of barium in the metal-poor
... occur in the helium and carbon shells of massive stars in their hydrostatic burning phases. The r-process is likely associated with the deep interior of Type II supernovae. Since massive stars dying as Type II supernovae evolve faster than the stars that populate and evolve from the AGB, one anticip ...
... occur in the helium and carbon shells of massive stars in their hydrostatic burning phases. The r-process is likely associated with the deep interior of Type II supernovae. Since massive stars dying as Type II supernovae evolve faster than the stars that populate and evolve from the AGB, one anticip ...
Maximizing the ExoEarth Candidate Yield from a Future Direct
... NASA Goddard Space Flight Center, Exoplanets & Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771; [email protected] ...
... NASA Goddard Space Flight Center, Exoplanets & Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771; [email protected] ...
The Mathematics of the Longitude
... displaced completely. The introduction of the chronometer not only solved the problem of measuring longitude but also made possible more flexible methods of fixing position which did not involve finding latitude and longitude separately. In 1837, Captain Charles Sumner devised a trigonometric method ...
... displaced completely. The introduction of the chronometer not only solved the problem of measuring longitude but also made possible more flexible methods of fixing position which did not involve finding latitude and longitude separately. In 1837, Captain Charles Sumner devised a trigonometric method ...
Annual Report 2006/2007
... Board after holding this position for four years. He was succeeded by van der Klis; (3) van Dishoeck started as NOVA Scientific Director and Boland was promoted to Executive Director. The period 2006-2007 saw once again a rich variety of new astrophysical results which are summarized in Chapter 3. H ...
... Board after holding this position for four years. He was succeeded by van der Klis; (3) van Dishoeck started as NOVA Scientific Director and Boland was promoted to Executive Director. The period 2006-2007 saw once again a rich variety of new astrophysical results which are summarized in Chapter 3. H ...
Super-Earth and Sub-Neptune Exoplanets: a First Look from the
... growing on a world parsecs away. It will not be an easy endeavor, but it is an important one. For centuries, we have imagined that stars other than our own might host planets. For decades, we have known that at least a few stars have planets orbiting them (Latham et al. 1989; Wolszczan & Frail 1992; ...
... growing on a world parsecs away. It will not be an easy endeavor, but it is an important one. For centuries, we have imagined that stars other than our own might host planets. For decades, we have known that at least a few stars have planets orbiting them (Latham et al. 1989; Wolszczan & Frail 1992; ...
The presence of gamma rays in space was known before they were
... gamma rays due to Rutherford. It was not until 1948 when Freeberg and Primakoff theorised that gamma rays are produced in space. The first actual gamma rays detected from space were detected by sensors mounted on a high altitude balloon by the scientists Peterson and Winckler in 1958. This was in th ...
... gamma rays due to Rutherford. It was not until 1948 when Freeberg and Primakoff theorised that gamma rays are produced in space. The first actual gamma rays detected from space were detected by sensors mounted on a high altitude balloon by the scientists Peterson and Winckler in 1958. This was in th ...
The Project Gutenberg eBook #31344: Mathematical Geography
... the nearer an object is, the greater is its attractive force. Just as the heat and light of a flame are greater the nearer one gets to it (Fig. 6), because more rays are intercepted, so the nearer an object is, the greater is its attraction. The ratio of the increase of the power of gravitation as d ...
... the nearer an object is, the greater is its attractive force. Just as the heat and light of a flame are greater the nearer one gets to it (Fig. 6), because more rays are intercepted, so the nearer an object is, the greater is its attraction. The ratio of the increase of the power of gravitation as d ...
A Comet-Hunter`s Legacy -
... larger and brighter M81 of course a bit more noticeably. The two galaxies are orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star format ...
... larger and brighter M81 of course a bit more noticeably. The two galaxies are orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star format ...
Astrophysics for Physicists.
... that many students get trained for a professional career in physics without a proper knowledge of astrophysics, one of the most active research areas of modern physics. Of late, many physics departments are waking up to the fact that this is a very undesirable situation. More and more physics depart ...
... that many students get trained for a professional career in physics without a proper knowledge of astrophysics, one of the most active research areas of modern physics. Of late, many physics departments are waking up to the fact that this is a very undesirable situation. More and more physics depart ...
Dawes Review. The tidal downsizing hypothesis of planet formation
... enveloping a solid core. In terms of environment, planets should be able to form as close as . 0.05 AU from the host star (Mayor & Queloz, 1995) to as far away as tens and perhaps even hundreds of AU (Marois et al., 2008; Brogan et al., 2015). Both small and large planets are not just smaller pieces ...
... enveloping a solid core. In terms of environment, planets should be able to form as close as . 0.05 AU from the host star (Mayor & Queloz, 1995) to as far away as tens and perhaps even hundreds of AU (Marois et al., 2008; Brogan et al., 2015). Both small and large planets are not just smaller pieces ...
Clusters: age scales for stellar physics
... age whose observational evidence is the departure of the massive members of a cluster once the central hydrogen has been exhausted, has been widely used. Another one valid for young associations is the isochrone fitting for low-mass stars. However, when these two values for several clusters are comp ...
... age whose observational evidence is the departure of the massive members of a cluster once the central hydrogen has been exhausted, has been widely used. Another one valid for young associations is the isochrone fitting for low-mass stars. However, when these two values for several clusters are comp ...
The physics and modes of star cluster formation: observations
... source density over the background, identification of the individual members is considerably more difficult, especially for intrinsically faint members whose numbers are only comparable to or significantly lower than those of the background/foreground stellar field population. The size of the cluster’s ...
... source density over the background, identification of the individual members is considerably more difficult, especially for intrinsically faint members whose numbers are only comparable to or significantly lower than those of the background/foreground stellar field population. The size of the cluster’s ...
Starspots: A Key to the Stellar Dynamo | SpringerLink
... strongly magnetically active (RS CVn-type, BY Dra-type, W UMa-type, and Algol-like systems). Rapidly rotating single giants of FK Com-type, which are probably formed from coalesced binaries complete the selection of magnetically active stars. An overview of magnetic phenomena on such stars is given ...
... strongly magnetically active (RS CVn-type, BY Dra-type, W UMa-type, and Algol-like systems). Rapidly rotating single giants of FK Com-type, which are probably formed from coalesced binaries complete the selection of magnetically active stars. An overview of magnetic phenomena on such stars is given ...
Building galaxies Hunt, Leslie Kipp
... published from 1888 to 1908. The combined NGC+IC contains more than 12000 objects, and to this day the brightest extragalactic objects are denoted by their numbers in Dreyer’s catalogue. The nature of these nebulae was the subject of much controversy, but advances in technology made it possible to a ...
... published from 1888 to 1908. The combined NGC+IC contains more than 12000 objects, and to this day the brightest extragalactic objects are denoted by their numbers in Dreyer’s catalogue. The nature of these nebulae was the subject of much controversy, but advances in technology made it possible to a ...
2 Justification and benefits in joining TMT
... largely coincided with the invention of the first modern telescope 400 years ago by Galileo Galilei that opened new horizons for astronomical observations. Astronomy has been at the forefront of scientific revolution, starting with the Copernicus's view of the Solar system. With increasingly large t ...
... largely coincided with the invention of the first modern telescope 400 years ago by Galileo Galilei that opened new horizons for astronomical observations. Astronomy has been at the forefront of scientific revolution, starting with the Copernicus's view of the Solar system. With increasingly large t ...
observations of white dwarfs in the solar neighborhood
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
RTICC Rapid Terrestrial Imaging CubeSat Constellation
... reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the number of planes. The number of spacecraft per plane is reduced if the spacecraft a ...
... reduction in the total number of spacecraft because of the better distribution at lower latitudes. The Walker configuration redistributes coverage by halving the number of spacecraft per plane and almost doubling the number of planes. The number of spacecraft per plane is reduced if the spacecraft a ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.