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Stellar feedback in...
Stellar feedback in M83 as observed with MUSE I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas
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- Della Bruna, Lorenza (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Adamo, Angela, 1981- (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Amram, Philippe (författare)
- Aix-Marseille University
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- Rosolowsky, Erik (författare)
- University of Alberta
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- Usher, Christopher (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Sirressi, Mattia (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Schruba, Andreas (författare)
- Max Planck Institute for Extraterrestrial Physics
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- Emsellem, Eric (författare)
- Ecole Normale Superieure de Lyon,European Southern Observatory
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- Leroy, Adam (författare)
- Ohio State University
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- Bik, Arjan (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Blair, William P. (författare)
- Johns Hopkins University
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- McLeod, Anna F. (författare)
- Durham University
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- Östlin, Göran (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Renaud, Florent (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Robert, Carmelle (författare)
- Laval University
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- Rousseau-Nepton, Laurie (författare)
- University of Hawai'i at Hilo
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- Smith, Linda J. (författare)
- European Space Agency (ESA)
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(creator_code:org_t)
- 2022-04-13
- 2022
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 660
- Relaterad länk:
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https://doi.org/10.1...
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Context. Young massive stars inject energy and momentum into the surrounding gas, creating a multi-phase interstellar medium (ISM) and regulating further star formation. The main challenge of studying stellar feedback proves to be the variety of scales spanned by this phenomenon, ranging from the immediate surrounding of the stars (H II regions, 10s pc scales) to galactic-wide kiloparsec scales.Aims. We present a large mosaic (3.8 × 3.8 kpc) of the nearby spiral galaxy M83, obtained with the MUSE instrument at ESO Very Large Telescope. The integral field spectroscopy data cover a large portion of the optical disk at a resolution of ∼20 pc, allowing the characterisation of single H II regions while sampling diverse dynamical regions in the galaxy.Methods. We obtained the kinematics of the stars and ionised gas, and compared them with molecular gas kinematics observed in CO(2-1) with the ALMA telescope array. We separated the ionised gas into H II regions and diffuse ionised gas (DIG) and investigated how the fraction of Hα luminosity originating from the DIG (fDIG) varies with galactic radius.Results. We observe that both stars and gas trace the galactic disk rotation, as well as a fast-rotating nuclear component (30″ ≃ 700 pc in diameter), likely connected to secular processes driven by the galactic bar. In the gas kinematics, we observe a stream east of the nucleus (50″ ≃ 1250 pc in size), redshifted with respect to the disk. The stream is surrounded by an extended ionised gas region (1000 × 1600 pc) with enhanced velocity dispersion and a high ionisation state, which is largely consistent with being ionised by slow shocks. We interpret this feature as either the superposition of the disk and an extraplanar layer of DIG, or as a bar-driven inflow of shocked gas. A double Gaussian component fit to the Hα line also reveals the presence of a nuclear biconic structure whose axis of symmetry is perpendicular to the bar. The two cones (20″ ≃ 500 pc in size) appear blue- and redshifted along the line of sight. The cones stand out for having an Hα emission separated by up to 200 km s−1 from that of the disk, and a high velocity dispersion ∼80–200 km s−1. At the far end of the cones, we observe that the gas is consistent with being ionised by shocks. These features had never been observed before in M83; we postulate that they are tracing a starburst-driven outflow shocking into the surrounding ISM. Finally, we obtain fDIG ∼ 13% in our field of view, and observe that the DIG contribution varies radially between 0.8 and 46%, peaking in the interarm region. We inspect the emission of the H II regions and DIG in ‘BPT’ diagrams, finding that in H II regions photoionisation accounts for 99.8% of the Hα flux, whereas the DIG has a mixed contribution from photoionisation (94.9%) and shocks (5.1%).
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies
- general
- galaxies
- individual
- NGC 5236
- galaxies
- ISM
- galaxies
- kinematics and dynamics
- ISM
- structure
- H II regions
- Galaxies: general
- Galaxies: individual: NGC 5236
- Galaxies: ISM
- Galaxies: kinematics and dynamics
- Ha II regions
- ISM: structure
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Della Bruna, Lor ...
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Adamo, Angela, 1 ...
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Amram, Philippe
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Rosolowsky, Erik
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Usher, Christoph ...
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Sirressi, Mattia
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Schruba, Andreas
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Emsellem, Eric
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Leroy, Adam
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Bik, Arjan
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Blair, William P ...
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McLeod, Anna F.
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Östlin, Göran
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Renaud, Florent
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Robert, Carmelle
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Rousseau-Nepton, ...
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Smith, Linda J.
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