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MusE GAs FLOw and W...
MusE GAs FLOw and Wind (MEGAFLOW) II. A study of gas accretion around z approximate to 1 star-forming galaxies with background quasars
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Zabl, Johannes (author)
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Bouché, Nicolas F. (author)
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Schroetter, Ilane (author)
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Wendt, Martin (author)
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- Finley, Hayley (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Université de Toulouse, France
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Schaye, Joop (author)
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Conseil, Simon (author)
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Contini, Thierry (author)
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Marino, Raffaella A. (author)
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Mitchell, Peter (author)
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Muzahid, Sowgat (author)
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Pezzulli, Gabriele (author)
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Wisotzki, Lutz (author)
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(creator_code:org_t)
- 2019-02-08
- 2019
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 485:2, s. 1961-1980
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We use the MusE GAs FLOw and Wind (MEGAFLOW) survey to study the kinematics of extended disc-like structures of cold gas around z approximate to 1 star-forming galaxies. The combination of VLT/MUSE and VLT/UVES observations allows us to connect the kinematics of the gas measured through MgII quasar absorption spectroscopy to the kinematics and orientation of the associated galaxies constrained through integral field spectroscopy. Confirming previous results, we find that the galaxy-absorber pairs of the MEGAFLOW survey follow a strong bimodal distribution, consistent with a picture of MgII absorption being predominantly present in outflow cones and extended disc-like structures. This allows us to select a bona-fide sample of galaxy-absorber pairs probing these discs for impact paramometers of 10-70 kpc. We test the hypothesis that the disc-like gas is co-rotating with the galaxy discs, and find that for seven out of nine pairs the absorption velocity shares the sign of the disc velocity, disfavouring random orbits. We further show that the data are roughly consistent with inflow velocities and angular momenta predicted by simulations, and that the corresponding mass accretion rates are sufficient to balance the star formation rates.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- galaxies: evolution
- galaxies: formation
- galaxies: haloes
- galaxies: kinematics and dynamics
- quasars: absorption lines
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zabl, Johannes
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Bouché, Nicolas ...
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Schroetter, Ilan ...
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Wendt, Martin
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Finley, Hayley
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Schaye, Joop
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show more...
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Conseil, Simon
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Contini, Thierry
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Marino, Raffaell ...
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Mitchell, Peter
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Muzahid, Sowgat
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Pezzulli, Gabrie ...
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Wisotzki, Lutz
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Monthly notices ...
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Stockholm University