Exploring the Origin of the Distance Bimodality of Stars in the Periphery of the Small Magellanic Cloud with APOGEE and Gaia Article Swipe
Andrés Almeida
,
Steven R. Majewski
,
David L. Nidever
,
Knut Olsen
,
Antonela Monachesi
,
Nitya Kallivayalil
,
Sten Hasselquist
,
Yumi Choi
,
Joshua Povick
,
John C. Wilson
,
D. Geisler
,
Richard R. Lane
,
Christian Nıtschelm
,
Jennifer Sobeck
,
Guy S. Stringfellow
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2308.13631
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2308.13631
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, 3 body interaction - the dynamical perturbation of the Small Magellanic Cloud (SMC) by the Large Magellanic Cloud (LMC), and specifically potential tidal effects on the SMC's eastern side. Using Gaia astrometry and the precise radial velocities and multi-element chemical abundances from APOGEE-2 DR17, we explore the well-known distance bimodality on the eastern side of the SMC. Through estimated stellar distances, proper motions, and radial velocities, we characterize the kinematics of the two populations in the bimodality and compare their properties with those of SMC populations elsewhere. Moreover, while all regions explored by APOGEE seem to show a single chemical enrichment history, the metallicity distribution function (MDF), of the "far" stars on the eastern periphery of the SMC is found to resemble that for the more metal-poor fields of the western periphery, whereas the MDF for the "near" stars on the eastern periphery resembles that for stars in the SMC center. The closer eastern periphery stars also show radial velocities (corrected for SMC rotation and bulk motion) that are, on average, approaching us relative to all other SMC populations sampled. We interpret these trends as evidence that the near stars on the eastern side of the SMC represent material pulled out of the central SMC as part of its tidal interaction with the LMC.
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Concepts
Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2308.13631
- https://arxiv.org/pdf/2308.13631
- OA Status
- green
- Cited By
- 2
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4386269583
All OpenAlex metadata
Raw OpenAlex JSON
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https://openalex.org/W4386269583Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2308.13631Digital Object Identifier
- Title
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Exploring the Origin of the Distance Bimodality of Stars in the Periphery of the Small Magellanic Cloud with APOGEE and GaiaWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-08-25Full publication date if available
- Authors
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Andrés Almeida, Steven R. Majewski, David L. Nidever, Knut Olsen, Antonela Monachesi, Nitya Kallivayalil, Sten Hasselquist, Yumi Choi, Joshua Povick, John C. Wilson, D. Geisler, Richard R. Lane, Christian Nıtschelm, Jennifer Sobeck, Guy S. StringfellowList of authors in order
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https://arxiv.org/abs/2308.13631Publisher landing page
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https://arxiv.org/pdf/2308.13631Direct link to full text PDF
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YesWhether a free full text is available
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2308.13631Direct OA link when available
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Bimodality, Physics, Stars, Astrophysics, Milky Way, Galaxy, Metallicity, Dwarf galaxy, Small Magellanic Cloud, Astronomy, Coplanarity, Red clump, Astrometry, Geometry, MathematicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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2Total citation count in OpenAlex
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2023: 2Per-year citation counts (last 5 years)
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10Other works algorithmically related by OpenAlex
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| primary_location.landing_page_url | http://arxiv.org/abs/2308.13631 |
| publication_date | 2023-08-25 |
| publication_year | 2023 |
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