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Prikvačeni tweet
Look at the magnificent spiral arms! Two faint (possibly satellite) galaxies can also be seen (top-right & bottom-centre).https://twitter.com/ESO/status/1099942364632760320 …
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Behnam Javanmardi proslijedio/la je Tweet
Our deep image of the stellar stream in the proximity of NGC1052 DF2, the famous (and controversial) galaxy with little or no dark matter (the small galaxy in the bottom right of the field). The stream seems to not be associated to it. Image by Mark Hanson with a 0.5-m telescope.pic.twitter.com/boJvLHbVBF
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Behnam Javanmardi proslijedio/la je Tweet
Beautiful winter light this morning at
@Obs_Paris@psl_univ in Meudonpic.twitter.com/uNULSrV57w
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Behnam Javanmardi proslijedio/la je Tweet
Ghosts of dwarf galaxies around nearby spiral galaxies, including a nice distant "NGC 5907 stream" analog (right panels). Images taken from our stellar tidal stream project with the Legacy surveys and composed by
@SpaceGeck (with data provided by@astroMoustakas &@dstndstn).pic.twitter.com/Zs7NrXlBfL
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A nice morning fog at Meudon site of
@Obs_Parispic.twitter.com/uqRkURvNUw
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Behnam Javanmardi proslijedio/la je Tweet
Bonjour les petites pousses ! Aujourd'hui un thread pour parler du site de l'
@Obs_Paris à Meudon ! C'est parti
pic.twitter.com/2qqxrkzt1F
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Behnam Javanmardi proslijedio/la je Tweet
Very interesting talk by Louise Breuval on H_0. Her work uses stable Cepheid companion stars to mitigate uncertainties in Gaia parallax, which can be biased due to their variability. They find H_0 = 69 +/- 2!!
#cosmiccontroversiespic.twitter.com/z9zCg6IkWZ
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Behnam Javanmardi proslijedio/la je Tweet
For the same reason, when a dwarf star inflates to become a giant or a supergiant, it’s rotation rate slows down considerably.https://twitter.com/bencbartlett/status/1173619891766620162 …
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I got the news a bit late, but am very glad to hear
@UniBonn has been selected as one of the top universities in Germany. Congrats!https://twitter.com/BMBF_Bund/status/1152219903291772934 …
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Hashimoto et al: A massive galaxy cluster in the local Universe with an unexpectedly large number of blue galaxies. https://arxiv.org/abs/1908.01666v1 …
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Behnam Javanmardi proslijedio/la je Tweet
A good science journalist doesn't just read the press release. They read the paper. They read other papers that are related. They know the best questions to ask, and know enough to ask what they don't understand. They are familiar with how science works.
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And here is the English press release: https://www.mff.cuni.cz/en/public/news/simulated-galaxies-without-dark-matter …
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(6/6) See also the homepage of Moritz for some cool movies:https://moritzhaslbauer.jimdo.com/research/galaxies-lacking-dark-matter/movies/ …
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(5/6) We find that, in LCDM, tidal and “normal” (dark-matter-dominated) dwarf galaxies populate different regions in the radius vs. mass diagram, in disagreement with observations (see Fig. 12 of our paper).
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(4/6) Our study verifies the expectations that two types of dwarf galaxies with different properties must exist in a Lambda-Cold-Dark-Matter (LCDM) universe.
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(3/6) We found around 100 such galaxies, and we performed thorough analyses and investigations on their properties concluding that they are strong candidates for being tidal dwarf galaxies.
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(2/6) I had the pleasure of contributing to a study led by Moritz Haslbauer (an excellent PhD student in Bonn) for searching for dark-matter-free dwarf galaxies in the Illustris cosmological simulation.
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(Thread, 1/6) Galaxies lacking dark matter in the Illustris simulation https://arxiv.org/abs/1905.03258
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Behnam Javanmardi proslijedio/la je Tweet
#BreakingNews Astronomers capture first image of a#BlackHole!@ESO@ALMAObs & APEX contributed to observations of gargantuan black hole at the heart of galaxy Messier 87.#RealBlackHole Web: https://www.eso.org/eht Press Release: https://www.eso.org/public/news/eso1907/ … Credit: EHT Collaborationpic.twitter.com/MOqSNr2rxh
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Behnam Javanmardi proslijedio/la je Tweet
The distance to the Large Magellanic Cloud to 1% published in
@nature today, from eclipsing binaries and@ESO#VLTI interferometry. An important result from the great Araucaria team to which I have the pleasure to belong. https://rdcu.be/bqSFO pic.twitter.com/SnSsUpwKd3
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