The chemical composition of solar-type stars and its impact on the
... on the gravitational lensing effect of its host star is measured, and pulsar timing, that lead to the first discovery of an exoplanet in 1992. With the pulsar timing method, observers examine small variations in the extremely periodic radio emission pattern of a star, that are caused by planets. How ...
... on the gravitational lensing effect of its host star is measured, and pulsar timing, that lead to the first discovery of an exoplanet in 1992. With the pulsar timing method, observers examine small variations in the extremely periodic radio emission pattern of a star, that are caused by planets. How ...
Formation of Molecular Clouds and Global Conditions for Star
... of this relation are different in different regimes. Transitions with higher critical densities such as HCN(1 − 0) and higher-J CO lines (Gao and Solomon 2004; Bayet et al. 2009; Juneau et al. 2009; Garcı́a-Burillo et al. 2012) also show power-law correlations but with smaller indices; the index app ...
... of this relation are different in different regimes. Transitions with higher critical densities such as HCN(1 − 0) and higher-J CO lines (Gao and Solomon 2004; Bayet et al. 2009; Juneau et al. 2009; Garcı́a-Burillo et al. 2012) also show power-law correlations but with smaller indices; the index app ...
THE UV-OPTICAL COLOR MAGNITUDE DIAGRAM. II. PHYSICAL
... their physical properties as a function of specific star formation rate (SFR /M? ) and stellar mass (M? ). Throughout this study our emphasis is on the properties of galaxies on and off of a local ‘‘star-forming sequence.’’ We discuss how the physical characteristics of galaxies along this sequence ...
... their physical properties as a function of specific star formation rate (SFR /M? ) and stellar mass (M? ). Throughout this study our emphasis is on the properties of galaxies on and off of a local ‘‘star-forming sequence.’’ We discuss how the physical characteristics of galaxies along this sequence ...
MPA Anniversary Brochure - Max Planck Institute for Astrophysics
... traditional optical domain to all parts of the electromagnetic spectrum, and even beyond, to neutrinos, energetic particles and, perhaps soon, to gravitational waves. Telescopes, traditionally sited at university or institute observatories, evolved first into national facilities on remote sites, and ...
... traditional optical domain to all parts of the electromagnetic spectrum, and even beyond, to neutrinos, energetic particles and, perhaps soon, to gravitational waves. Telescopes, traditionally sited at university or institute observatories, evolved first into national facilities on remote sites, and ...
environmental effects on galaxy evolution in nearby clusters
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
Gaia 1 and 2. A pair of new satellites of the Galaxy
... Given that the first Gaia DR does not provide colour information, we have to be particularly careful when selecting objects for the satellite search (we cannot use colourmagnitude masks based on stellar isochrones, as in i.e. Koposov et al. 2015). For the analysis in this paper we apply only two sel ...
... Given that the first Gaia DR does not provide colour information, we have to be particularly careful when selecting objects for the satellite search (we cannot use colourmagnitude masks based on stellar isochrones, as in i.e. Koposov et al. 2015). For the analysis in this paper we apply only two sel ...
Teaching Tips Table of Contents - Hubble Deep Field
... The Mathematical World: C. Shapes By the end of 8th grade, students should know that ...
... The Mathematical World: C. Shapes By the end of 8th grade, students should know that ...
OBSERVATIONS OF PHYSICAL PROCESSES IN
... cluster galaxies (BCGs) of those clusters. It has been known for a while that the state of the hot intracluster medium (ICM) gas in the core of a galaxy cluster, quantified as the central entropy of the gas, can be found in two particular states. Galaxy clusters with central entropies greater than 3 ...
... cluster galaxies (BCGs) of those clusters. It has been known for a while that the state of the hot intracluster medium (ICM) gas in the core of a galaxy cluster, quantified as the central entropy of the gas, can be found in two particular states. Galaxy clusters with central entropies greater than 3 ...
LCM SerieS
... computer automated technology. Simple and friendly to use, the LCM telescope is up and running after locating just three bright celestial objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the LCM’s built-in Sky Tour featur ...
... computer automated technology. Simple and friendly to use, the LCM telescope is up and running after locating just three bright celestial objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the LCM’s built-in Sky Tour featur ...
Set 3 AStronomy questions
... Y) very similar chemical compositions Z) the same apparent magnitudes ANSWER: Y) VERY SIMILAR CHEMICAL COMPOSITIONS BONUS 7) ASTRONOMY Multiple Choice When binary stars are made of a main sequence star and a compact white dwarf, as long as the white dwarf’s mass remains below 1.4 solar masses then t ...
... Y) very similar chemical compositions Z) the same apparent magnitudes ANSWER: Y) VERY SIMILAR CHEMICAL COMPOSITIONS BONUS 7) ASTRONOMY Multiple Choice When binary stars are made of a main sequence star and a compact white dwarf, as long as the white dwarf’s mass remains below 1.4 solar masses then t ...
The physics and modes of star cluster formation: observations
... 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 membership can be determined statistically through comparison with the backg ...
... 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 membership can be determined statistically through comparison with the backg ...
Carbon, nitrogen and oxygen abundances in
... namely: Teff is between 15 300 and 24 100 K and log g is mostly greater than 3.75; therefore, stars with medium masses of 5–11 M are selected. Theory predicts for the stars with such parameters that the C, N and O abundances in their atmospheres should correspond to their initial values. Non-local ...
... namely: Teff is between 15 300 and 24 100 K and log g is mostly greater than 3.75; therefore, stars with medium masses of 5–11 M are selected. Theory predicts for the stars with such parameters that the C, N and O abundances in their atmospheres should correspond to their initial values. Non-local ...
ABSTRACT Exoplanet Habitability and an Analysis of Gliese 436 b
... these building blocks will not lead to the development of life. Along with water and these building blocks, UV radiation and greenhouse gases must be considered. If too much radiation reaches the exoplanet’s surface, then molecular formation necessary for life, such as proteins and DNA, can be easil ...
... these building blocks will not lead to the development of life. Along with water and these building blocks, UV radiation and greenhouse gases must be considered. If too much radiation reaches the exoplanet’s surface, then molecular formation necessary for life, such as proteins and DNA, can be easil ...
Meteor Shower Observations
... Just as sporadic meteors tend to be more numerous in the predawn hours, so do shower meteors. A few meteoroid swarms, however, catch Earth from behind. Most notably the Arietid Meteor shower catches Earth from behind in June of each year. This results in evening meteors rather day predawn meteors. T ...
... Just as sporadic meteors tend to be more numerous in the predawn hours, so do shower meteors. A few meteoroid swarms, however, catch Earth from behind. Most notably the Arietid Meteor shower catches Earth from behind in June of each year. This results in evening meteors rather day predawn meteors. T ...
T3-Cosmic Star Formation History
... of the complex evolutionary phases of individual galaxy subpopulations. The modern version of this technique relies on some basic properties of stellar populations and dusty starburst galaxies: 1. The UV-continuum emission in all but the oldest galaxies is dominated by short-lived massive stars. The ...
... of the complex evolutionary phases of individual galaxy subpopulations. The modern version of this technique relies on some basic properties of stellar populations and dusty starburst galaxies: 1. The UV-continuum emission in all but the oldest galaxies is dominated by short-lived massive stars. The ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.