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The GALAH survey :
The GALAH survey : Chemical homogeneity of the Orion complex
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- Kos, Janez (författare)
- University of Ljubljana
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- Bland-Hawthorn, Joss (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of Sydney
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- Buder, Sven (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Australian National University
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- Nordlander, Thomas (författare)
- Australian National University,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Spina, Lorenzo (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Monash University
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- Beeson, Kevin L. (författare)
- Stockholm University,Max Planck Institute for Astronomy
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- Lind, Karin (författare)
- Stockholms universitet,Institutionen för astronomi,Max Planck Institute for Astronomy, Germany
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- Asplund, Martin (författare)
- Max Planck Institute for Astrophysic
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- Freeman, Ken (författare)
- Australian National University,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Hayden, Michael R. (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of Sydney
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- Lewis, Geraint F. (författare)
- University of Sydney
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- Martell, Sarah L. (författare)
- University of New South Wales,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- Sharma, Sanjib (författare)
- University of Sydney,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D)
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- De Silva, Gayandhi (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Macquarie University, Sydney
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- Simpson, Jeffrey D. (författare)
- Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of New South Wales
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- Zucker, Daniel B. (författare)
- Macquarie University, Sydney
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- Zwitter, Tomaž (författare)
- University of Ljubljana
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- Čotar, Klemen (författare)
- University of Ljubljana
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- Horner, Jonti (författare)
- University of Southern Queensland
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- Ting, Yuan-Sen (丁源森) (författare)
- Carnegie Observatories,Australian National University,Institute for Advanced Study, Princeton,Princeton University
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- Traven, Gregor (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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(creator_code:org_t)
- 2021-06-28
- 2021
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 506:3, s. 4232-4250
- Relaterad länk:
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http://eprints.usq.e...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Due to its proximity, the Orion star forming region is often used as a proxy to study processes related to star formation and to observe young stars in the environment they were born in. With the release of Gaia DR2, the distance measurements to the Orion complex are now good enough that the 3D structure of the complex can be explored. Here we test the hypothesis that, due to non-trivial structure and dynamics, and age spread in the Orion complex, the chemical enrichment of youngest stars by early core-collapse supernovae can be observed. We obtained spectra of 794 stars of the Orion complex with the HERMES spectrograph at the Anglo Australian telescope as a part of the GALAH and GALAH-related surveys. We use the spectra of similar to 300 stars to derive precise atmospheric parameters and chemical abundances of 25 elements for 15 stellar clusters in the Orion complex. We demonstrate that the Orion complex is chemically homogeneous and that there was no self-pollution of young clusters by core-collapse supernovae from older clusters; with a precision of 0.02 dex in relative alpha-elements abundance and 0.06 dex in oxygen abundance we would have been able to detect pollution from a single supernova, given a fortunate location of the SN and favourable conditions for ISM mixing. We estimate that the supernova rate in the Orion complex was very low, possibly producing no supernova by the time the youngest stars of the observed population formed (from around 21 to 8 Myr ago).
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- astrochemistry
- stars: abundances
- stars: formation
- stars: pre-main-sequence
- open clusters and associations: general
- astrochemistry
- open clusters and associations: general
- stars: abundances
- stars: formation
- stars: pre-main-sequence
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
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Kos, Janez
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Bland-Hawthorn, ...
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Buder, Sven
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Nordlander, Thom ...
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Spina, Lorenzo
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Beeson, Kevin L.
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Lind, Karin
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Asplund, Martin
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Freeman, Ken
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Hayden, Michael ...
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Lewis, Geraint F ...
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Martell, Sarah L ...
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Sharma, Sanjib
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De Silva, Gayand ...
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Simpson, Jeffrey ...
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Zucker, Daniel B ...
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Zwitter, Tomaž
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Čotar, Klemen
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Horner, Jonti
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Ting, Yuan-Sen ( ...
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Traven, Gregor
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