LACEwING: A New Moving Group Analysis Code
... 100 pc away. In the last 30 years (starting with studies like Rucinski & Krautter 1983 and de la Reza et al. 1989), a number of stars have been discovered within that distance that are relatively young (5–500 Myr). This population of stars has been extensively studied and has immense scientific value ...
... 100 pc away. In the last 30 years (starting with studies like Rucinski & Krautter 1983 and de la Reza et al. 1989), a number of stars have been discovered within that distance that are relatively young (5–500 Myr). This population of stars has been extensively studied and has immense scientific value ...
Astronomy 250 - University of Victoria
... Every measured quantity will always have an associated uncertainy. Errors can occur, for example, because of the limitations of the measuring device, because of systematic offsets (see below), because of legitimate dispersions in the data, etc. Example: Suppose you are trying to measure the brightne ...
... Every measured quantity will always have an associated uncertainy. Errors can occur, for example, because of the limitations of the measuring device, because of systematic offsets (see below), because of legitimate dispersions in the data, etc. Example: Suppose you are trying to measure the brightne ...
How to Build an Astrolabe
... astrolabes, the starry equivalent of a map of the earth. The front of the medieval astrolabe shows a map of the night sky on the rotating rete. Its name is taken from the Latin word for ‘net’, because of the appearance of the spikes which indicated the positions of individual stars. The rete also sh ...
... astrolabes, the starry equivalent of a map of the earth. The front of the medieval astrolabe shows a map of the night sky on the rotating rete. Its name is taken from the Latin word for ‘net’, because of the appearance of the spikes which indicated the positions of individual stars. The rete also sh ...
How to Build an Astrolabe - St John`s College, Cambridge
... astrolabes, the starry equivalent of a map of the earth. The front of the medieval astrolabe shows a map of the night sky on the rotating rete. Its name is taken from the Latin word for ‘net’, because of the appearance of the spikes which indicated the positions of individual stars. The rete also sh ...
... astrolabes, the starry equivalent of a map of the earth. The front of the medieval astrolabe shows a map of the night sky on the rotating rete. Its name is taken from the Latin word for ‘net’, because of the appearance of the spikes which indicated the positions of individual stars. The rete also sh ...
Classification of Variable Stars
... Nomenclature of Variable Stars The name of a variable star generally consists of one or two capital letters or a Greek letter, followed by a three letter constellation abbreviation. There are also variables with names such as V746 Oph and V1668 Cyg. These are stars in constellations for which all of ...
... Nomenclature of Variable Stars The name of a variable star generally consists of one or two capital letters or a Greek letter, followed by a three letter constellation abbreviation. There are also variables with names such as V746 Oph and V1668 Cyg. These are stars in constellations for which all of ...
A Star - Cloudy Nights
... bluish tint. The pair are about 410 light years distant and are separated by 4400 A.U. Mizar is a fine example of a double star system. This pair lies at a distance of 88 light years and are separated by 380 A.U. Observations indicate that it must take several thousand years for these two stars to ...
... bluish tint. The pair are about 410 light years distant and are separated by 4400 A.U. Mizar is a fine example of a double star system. This pair lies at a distance of 88 light years and are separated by 380 A.U. Observations indicate that it must take several thousand years for these two stars to ...
Gaia 1 and 2. A pair of new satellites of the Galaxy
... The first stellar overdensity without an obvious counterpart, i.e. without an entry in any of the clusters/galaxies catalogues available to us, has an estimated significance of ∼ 10. Note however, that initially, this candidate, dubbed here Gaia 1, was rejected as it is located in close proximity of ...
... The first stellar overdensity without an obvious counterpart, i.e. without an entry in any of the clusters/galaxies catalogues available to us, has an estimated significance of ∼ 10. Note however, that initially, this candidate, dubbed here Gaia 1, was rejected as it is located in close proximity of ...
The Nature of the Stars
... The closer the object you are You measure distances viewing, the greater the parallax shift. To see this, repeat the experiment around you by comparing with your hand held closer to your the images from your face. Your brain analyzes such paral- left and right eyes—we lax shifts constantly as it com ...
... The closer the object you are You measure distances viewing, the greater the parallax shift. To see this, repeat the experiment around you by comparing with your hand held closer to your the images from your face. Your brain analyzes such paral- left and right eyes—we lax shifts constantly as it com ...
The Ages of Stars
... Yet age lies at the heart of stellar evolution, for how can there be evolution About Stellar Ages? without the passage of time? Sometimes our desire to know ages is satisfied if we (see p. 46) can place events in the correct sequence and understand the relative duration of phases. But often we need ...
... Yet age lies at the heart of stellar evolution, for how can there be evolution About Stellar Ages? without the passage of time? Sometimes our desire to know ages is satisfied if we (see p. 46) can place events in the correct sequence and understand the relative duration of phases. But often we need ...
Properties of Galactic early-type O
... interstellar contamination dominates the whole UV spectrum of HD 15570; only strong lines such as C iv λλ1548-1550 or N iv λ1718 can be used safely for this star. All stars but HD 66811 were observed with FUSE through the LWRS 30 × 30 aperture. The nominal spectral resolution is 20 000, or about ...
... interstellar contamination dominates the whole UV spectrum of HD 15570; only strong lines such as C iv λλ1548-1550 or N iv λ1718 can be used safely for this star. All stars but HD 66811 were observed with FUSE through the LWRS 30 × 30 aperture. The nominal spectral resolution is 20 000, or about ...
Colloquial Jakartan Indonesian
... For as far back as the four or five thousand years that we can trace them culturally, Austronesian speakers have preferred to live close to the sea.1 They have typically been sailors and fishermen. For as long as their settlements were confined to southeast Asia and northwest Melanesia, virtually al ...
... For as far back as the four or five thousand years that we can trace them culturally, Austronesian speakers have preferred to live close to the sea.1 They have typically been sailors and fishermen. For as long as their settlements were confined to southeast Asia and northwest Melanesia, virtually al ...
Stargazing For Beginners: A Binocular Tour of the Southern Night Sky
... This course introduces you to the bright stars and major constellations visible from the Southern Hemisphere, along with dozens of deep-sky sights of interest within each constellation, such as galaxies, binary stars, nebulae, and star clusters. It assumes you are equipped with nothing more than a s ...
... This course introduces you to the bright stars and major constellations visible from the Southern Hemisphere, along with dozens of deep-sky sights of interest within each constellation, such as galaxies, binary stars, nebulae, and star clusters. It assumes you are equipped with nothing more than a s ...
Document
... Review of what you have at this point: 1) Target list with an idea of distances that do not exceed what is possible with your detector ...
... Review of what you have at this point: 1) Target list with an idea of distances that do not exceed what is possible with your detector ...
On the elemental abundance and isotopic mixture of mercury in
... components for each transition are presented in Table 2 for the case of a terrestrial isotopic mixture (Anders & Grevesse 1989). The wavelengths for the λ4358 and the λ3984 lines were taken from Wahlgren et al. (2000), while the oscillator strengths are experimental values adopted from Benck et al. ...
... components for each transition are presented in Table 2 for the case of a terrestrial isotopic mixture (Anders & Grevesse 1989). The wavelengths for the λ4358 and the λ3984 lines were taken from Wahlgren et al. (2000), while the oscillator strengths are experimental values adopted from Benck et al. ...
The Evolution of Isotope Ratios in the Milky Way Galaxy
... (Sneden et al. 2002). It should be noted however that from that list only the carbon isotope ratio is relatively easy to obtain. For this reason there is data for the carbon isotope ratio for stars in many different evolutionary states, metallicities, and locations (including in external galaxies su ...
... (Sneden et al. 2002). It should be noted however that from that list only the carbon isotope ratio is relatively easy to obtain. For this reason there is data for the carbon isotope ratio for stars in many different evolutionary states, metallicities, and locations (including in external galaxies su ...
A cold detached dust envelope around an oxygen-rich Mira
... We have applied HIRAS to the IRAS 60 and 100 µm data in order to investigate the spatial structure around R Hya. The 60 and 100 µm images of R Hya are shown in Fig. 2a and b, respectively. The 60 µm image (Fig. 2a) shows a definite component of the extended emission around R Hya with an effective sp ...
... We have applied HIRAS to the IRAS 60 and 100 µm data in order to investigate the spatial structure around R Hya. The 60 and 100 µm images of R Hya are shown in Fig. 2a and b, respectively. The 60 µm image (Fig. 2a) shows a definite component of the extended emission around R Hya with an effective sp ...
A Spitzer mid-infrared spectral survey of mass
... K , M K ) ∼ (1, −10.7) in Fig. 1(b) was not a target but was accidentally observed when Spitzer selected it in the peak-up field.] It turns out that only two of the LMC sources were oxygen-rich, one of which was found to be a massive young stellar object (van Loon et al. 2005b). Here we present the ...
... K , M K ) ∼ (1, −10.7) in Fig. 1(b) was not a target but was accidentally observed when Spitzer selected it in the peak-up field.] It turns out that only two of the LMC sources were oxygen-rich, one of which was found to be a massive young stellar object (van Loon et al. 2005b). Here we present the ...
Processing of Star Catalog and Star Image
... Processing of star catalog and star image is the groundwork for star identification. The star sensor process establishes the three-axis attitude of spacecraft by observing and identifying stars. Thus, star information is indispensable. The star information used by the star sensor process mainly inclu ...
... Processing of star catalog and star image is the groundwork for star identification. The star sensor process establishes the three-axis attitude of spacecraft by observing and identifying stars. Thus, star information is indispensable. The star information used by the star sensor process mainly inclu ...
Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters
... for their chemical composition. This is especially true for the complex, multimetallic cluster ω Centauri, with its large range of iron, carbon, nitrogen, oxygen, sodium and barium abundances. In order to accomplish this, an automated spectral matching pipeline was developed to determine these abund ...
... for their chemical composition. This is especially true for the complex, multimetallic cluster ω Centauri, with its large range of iron, carbon, nitrogen, oxygen, sodium and barium abundances. In order to accomplish this, an automated spectral matching pipeline was developed to determine these abund ...
Luminosity, Flux and Magnitudes Outline
... Parallaxes are the key to knowing distances in the universe. Nearby stars are the stepping stone to measuring distance to everything else in the universe. We can now compute the luminosity of stars! ...
... Parallaxes are the key to knowing distances in the universe. Nearby stars are the stepping stone to measuring distance to everything else in the universe. We can now compute the luminosity of stars! ...
FIRST STELLAR ABUNDANCES IN THE DWARF IRREGULAR
... stars. Thus, more elements than just those observed in nebulae need to be measured, since each have different formation sites which sample different constituents. The α elements like oxygen are created primarily in short-lived massive stars, while the iron-group elements are produced in SNe of both ...
... stars. Thus, more elements than just those observed in nebulae need to be measured, since each have different formation sites which sample different constituents. The α elements like oxygen are created primarily in short-lived massive stars, while the iron-group elements are produced in SNe of both ...
What To See Telescope(Jul-Sept) v1 - One
... locate specific major constellations. To help you get oriented, the last appendix includes three whole-sky maps that show the constellations as seen from mid-northern latitudes in July, August, and September. Your telescope may have come with at least two eyepieces, and you may have acquired one or ...
... locate specific major constellations. To help you get oriented, the last appendix includes three whole-sky maps that show the constellations as seen from mid-northern latitudes in July, August, and September. Your telescope may have come with at least two eyepieces, and you may have acquired one or ...
Red supergiants around the obscured open cluster Stephenson 2
... (Qflg = A, B, C, or D) in all three 2MASS bands. A few objects with other quality flags were included in the sample and assigned low priority, after we checked out that they were not badly blended. In the end, only two such objects were observed, J18402969−0546359,1 and J18403226−0611584. The 2MASS ...
... (Qflg = A, B, C, or D) in all three 2MASS bands. A few objects with other quality flags were included in the sample and assigned low priority, after we checked out that they were not badly blended. In the end, only two such objects were observed, J18402969−0546359,1 and J18403226−0611584. The 2MASS ...
The Stars - Springer
... November 1. Similarly, it will transit on February 1 at approximately 10.00 p.m., and on March 1 at about 8.00 p.m. ...
... November 1. Similarly, it will transit on February 1 at approximately 10.00 p.m., and on March 1 at about 8.00 p.m. ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.