Active Galactic Nuclei: are they important?
... Czerny, Siemiginowska, Janiuk, NikielWroczyński, Stawarz 2009, data points ...
... Czerny, Siemiginowska, Janiuk, NikielWroczyński, Stawarz 2009, data points ...
The Galactic evolution of phosphorus
... therein). This is not the case for phosphorus, that, before this work, had never been analysed systematically in cool stars. The reason why was already given by Struve (1930): no P i line is available in the “ordinary” range of the observed spectra of stars of spectral type F, G, or K. Some P ii and ...
... therein). This is not the case for phosphorus, that, before this work, had never been analysed systematically in cool stars. The reason why was already given by Struve (1930): no P i line is available in the “ordinary” range of the observed spectra of stars of spectral type F, G, or K. Some P ii and ...
Exploring the Universe
... – Distance affects the brightness of stars – What we see is called the apparent magnitude – Absolute magnitude is a measurement of the brightness as if the distance from the earth was 32.6 light years away. A uniform distance, so it’s the real brightness. – Besides the sun, the brightest star is Sir ...
... – Distance affects the brightness of stars – What we see is called the apparent magnitude – Absolute magnitude is a measurement of the brightness as if the distance from the earth was 32.6 light years away. A uniform distance, so it’s the real brightness. – Besides the sun, the brightest star is Sir ...
24.1 Hubble`s Galaxy Classification
... 24.2 The Distribution of Galaxies in Space Another standard candle, only used in the past decade: Type I supernovae (carbon detonation supernovae) all have about the same luminosity at the peak of their light curve (see Ch.21), because the process by which they explode (luckily) doesn’t allow for m ...
... 24.2 The Distribution of Galaxies in Space Another standard candle, only used in the past decade: Type I supernovae (carbon detonation supernovae) all have about the same luminosity at the peak of their light curve (see Ch.21), because the process by which they explode (luckily) doesn’t allow for m ...
Summer 2014 Mercury - Astronomical Society of the Pacific
... The high point of the year’s Marius events will be a conference on his life and work at the Nicolaus Copernicus Planetarium in Nürnberg on September 20. The proceedings will eventually be published in a book. And one of the principal goals of the “Simon Marius Anniversary” has been achieved: the com ...
... The high point of the year’s Marius events will be a conference on his life and work at the Nicolaus Copernicus Planetarium in Nürnberg on September 20. The proceedings will eventually be published in a book. And one of the principal goals of the “Simon Marius Anniversary” has been achieved: the com ...
Topic 4 - The University of Sheffield
... “Metals”. This is not seen. We see mainly hydrogen again. ‣ Also rocks and dust can be observed by obscuration of background light. It is actually hard to hide in the Universe. It can produce spectral lines if hot or absorption lines due to background stars. Not enough of this phenomena is seen. Non ...
... “Metals”. This is not seen. We see mainly hydrogen again. ‣ Also rocks and dust can be observed by obscuration of background light. It is actually hard to hide in the Universe. It can produce spectral lines if hot or absorption lines due to background stars. Not enough of this phenomena is seen. Non ...
Finnish Centre for Astronomy with ESO
... Finland is a member of the European Southern Observatory (ESO) since 2004. ESO is a world leading astronomical research and technology organization, with 15 member states, headquarters in Garching, Germany, and three world-class observatories in Chile. Finnish Centre for Astronomy with ESO (FINCA) i ...
... Finland is a member of the European Southern Observatory (ESO) since 2004. ESO is a world leading astronomical research and technology organization, with 15 member states, headquarters in Garching, Germany, and three world-class observatories in Chile. Finnish Centre for Astronomy with ESO (FINCA) i ...
Pluto Challenge - Cedar Amateur Astronomers
... of a Plutonian day to be 6.4 Earth days. Pluto’s orbit around the sun takes 248.5 Earth years. These days Pluto traverses an area of the night sky that it hasn’t visited since 20 years prior to signing of the United States Declaration of Independence! NASA has plans to send a science mission to Plut ...
... of a Plutonian day to be 6.4 Earth days. Pluto’s orbit around the sun takes 248.5 Earth years. These days Pluto traverses an area of the night sky that it hasn’t visited since 20 years prior to signing of the United States Declaration of Independence! NASA has plans to send a science mission to Plut ...
Slide 1
... (some) PMS studies using photometry alone Accumulaton of nearly complete nearby-star census (DENIS, 2MASS, …); see Reid et al. 2002 Refinement of cluster study techniques: membership, correction for foreground/background stars, differential reddening, … Sensitive near-IR cameras to study embedded st ...
... (some) PMS studies using photometry alone Accumulaton of nearly complete nearby-star census (DENIS, 2MASS, …); see Reid et al. 2002 Refinement of cluster study techniques: membership, correction for foreground/background stars, differential reddening, … Sensitive near-IR cameras to study embedded st ...
POSTERS SESSION I: Atmospheres of Massive Stars
... We demonstrate that it is possible to have clumping occur close to the star while still achieving an excellent fit to Hα by consistently treating the wind’s rotation in the spectral modeling. An excellent agreement to other important optical lines such as HeII 4686 Å and NIII 4634–4640 Å is also o ...
... We demonstrate that it is possible to have clumping occur close to the star while still achieving an excellent fit to Hα by consistently treating the wind’s rotation in the spectral modeling. An excellent agreement to other important optical lines such as HeII 4686 Å and NIII 4634–4640 Å is also o ...
Image filtering
... Can be used whenever the data are meant to be compared with external measurements • Photometric calibration of standard stars (e.g. Landolt) • Colour measurements ...
... Can be used whenever the data are meant to be compared with external measurements • Photometric calibration of standard stars (e.g. Landolt) • Colour measurements ...
Project 5: Globular cluster
... by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the more massive ones. There are ~150 known globular clusters that orbit our own Milky Way galaxy cor ...
... by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the more massive ones. There are ~150 known globular clusters that orbit our own Milky Way galaxy cor ...
2_ISM - UCT Astronomy Department
... density of smoke would be such that objects would disappear in haze at distance of much less than 1m!!! ...
... density of smoke would be such that objects would disappear in haze at distance of much less than 1m!!! ...
An Overview of the Gaia
... • Cold dark matter simulations predict a bottom-up scenario for galaxy formation. • There is secular evolution as well. • Galaxies evolved chemically, under the right conditions, since each generation of stars progressively enriches the gas. ...
... • Cold dark matter simulations predict a bottom-up scenario for galaxy formation. • There is secular evolution as well. • Galaxies evolved chemically, under the right conditions, since each generation of stars progressively enriches the gas. ...
Image Analysis of Planetary Nebula NGC 6543 South Carolina State University
... tipped at various angles creating a display with two-sided symmetry. Beside the discovery of a glowing bubble of hot gas, scientists noticed an unexpected X-ray bright central star, which is an O-type star, within the structure of the planetary nebula. NGC 6543 is 8th magnitude and located almost ex ...
... tipped at various angles creating a display with two-sided symmetry. Beside the discovery of a glowing bubble of hot gas, scientists noticed an unexpected X-ray bright central star, which is an O-type star, within the structure of the planetary nebula. NGC 6543 is 8th magnitude and located almost ex ...
Chapter16.2
... main sequence. • Higher-mass stars form faster. • Lower-mass stars form more slowly. © 2010 Pearson Education, Inc. ...
... main sequence. • Higher-mass stars form faster. • Lower-mass stars form more slowly. © 2010 Pearson Education, Inc. ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.