Difference between revisions of "Talk:Cosmic objects"

Latest revision as of 18:04, 2 June 2019

Stars

Back Holes

http://www.nationalgeographic.it/scienza/spazio/2018/06/04/news/buchi_neri_intermedi_soluzione_mistero_buchi_neri_supermassivi-4006446/ Svolta nella soluzione del mistero della crescita dei buchi neri

Galaxies

http://m.esa.int/Our_Activities/Space_Science/Gaia/Gaia_creates_richest_star_map_of_our_Galaxy_and_beyond

Galaxy 5 billion light-years away shows we live in a magnetic universe: Gravitational lens provides key opportunity https://www.sciencedaily.com/releases/2017/08/170828124520.htm A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies.

Langlands program

Da <https://en.wikipedia.org/wiki/Langlands_program>

The peculiar velocities of galaxies near the Local Group. Libeskind & Tully, (C) Scientific American.

The Local Universe is shown here as a section of the super galactic plane. Both the density (color) and the corresponding velocity field (flow lines) are Wiener Filter reconstructions obtained from the CosmicFlow-2 radial peculiar velocity catalogue, which recover the observed structure in local cosmic neighborhood remarkably well (Libeskind et al 2015).

Unlike ordinary matter, dark matter does not emit or absorb light--or any other type of electromagnetic radiation. Consequently, dark matter cannot be observed directly using a telescope or any other astronomical instrument that has been developed by humans. If dark matter has these strange properties, how do we know that it exists in the first place? Like ordinary matter, dark matter interacts gravitationally with ordinary matter and radiation. Astronomers study the distribution of dark matter through observing its gravitational effects on ordinary matter in its vicinity and through its gravitational lensing effects on background radiation. The background image shows the bullet cluster, a famous example where the visible matter does not follow the mass distribution. Combining all the available evidence, dark matter represents about 83% of the matter content of the universe. Read more about dark matter on this web page. Let us know your questions and comments on the message board.

http://www.skyandtelescope.com/astronomy-news/featured-image-the-cosmic-velocity-web/

Galaxy 5 billion light-years away shows we live in a magnetic universe: Gravitational lens provides key opportunity https://www.sciencedaily.com/releases/2017/08/170828124520.htm A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies.

Galactic Magnetic Field lunedì 28 agosto 2017 21:51 Galaxy 5 billion light-years away shows we live in a magnetic universe: Gravitational lens provides key opportunity https://www.sciencedaily.com/releases/2017/08/170828124520.htm A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies.

Video galassia https://www.photomirage.io/static/pm/video/gallery/galaxy.mp4

Clusters of galaxies

Clusters dimensions https://www.sciencedaily.com/releases/2018/04/180424093711.htm Uncovering the secret law of the evolution of galaxy clusters

The Cosmic Web

The peculiar velocities of galaxies near the Local Group. Libeskind & Tully, (C) Scientific American.

The Local Universe is shown here as a section of the super galactic plane. Both the density (color) and the corresponding velocity field (flow lines) are Wiener Filter reconstructions obtained from the CosmicFlow-2 radial peculiar velocity catalogue, which recover the observed structure in local cosmic neighborhood remarkably well (Libeskind et al 2015).

Unlike ordinary matter, dark matter does not emit or absorb light--or any other type of electromagnetic radiation. Consequently, dark matter cannot be observed directly using a telescope or any other astronomical instrument that has been developed by humans. If dark matter has these strange properties, how do we know that it exists in the first place? Like ordinary matter, dark matter interacts gravitationally with ordinary matter and radiation. Astronomers study the distribution of dark matter through observing its gravitational effects on ordinary matter in its vicinity and through its gravitational lensing effects on background radiation. The background image shows the bullet cluster, a famous example where the visible matter does not follow the mass distribution. Combining all the available evidence, dark matter represents about 83% of the matter content of the universe. Read more about dark matter on this web page. Let us know your questions and comments on the message board.

http://www.skyandtelescope.com/astronomy-news/featured-image-the-cosmic-velocity-web/

The Cosmic V-Web giovedì 17 agosto 2017 23:03 The Cosmic V-Web

https://vimeo.com/206210825

https://www.sciencedaily.com/releases/2017/08/170815095132.htm

The Cosmic V-Web

http://www.ifa.hawaii.edu/info/press-releases/galaxy_orbits/

@article{PhysRevLett.120.261301,

 title = {Radial Acceleration Relation of $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ Satellite Galaxies},
 author = {Garaldi, Enrico and Romano-D\'{\i}az, Emilio and Porciani, Cristiano and Pawlowski, Marcel S.},
 journal = {Phys. Rev. Lett.},
 volume = {120},
 issue = {26},
 pages = {261301},
 numpages = {5},
 year = {2018},
 month = {Jun},
 publisher = {American Physical Society},
 doi = {10.1103/PhysRevLett.120.261301},
 url = {https://link.aps.org/doi/10.1103/PhysRevLett.120.261301}

}