Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 안덕근 | * |
dc.date.accessioned | 2023-10-19T16:31:30Z | - |
dc.date.available | 2023-10-19T16:31:30Z | - |
dc.date.issued | 2023 | * |
dc.identifier.issn | 0004-637X | * |
dc.identifier.other | OAK-33847 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/266381 | - |
dc.description.abstract | We continue our series of papers on phase-space distributions of stars in the Milky Way based on photometrically derived metallicities and Gaia astrometry, with a focus on the halo−disk interface in the local volume. To exploit various photometric databases, we develop a method of empirically calibrating synthetic stellar spectra based on a comparison with observations of stellar sequences and individual stars in the Sloan Digital Sky Survey, the SkyMapper Sky Survey, and the Pan-STARRS1 surveys, overcoming band-specific corrections employed in our previous work. In addition, photometric zero-point corrections are derived to provide an internally consistent photometric system with a spatially uniform metallicity zero-point. Using our phase-space diagrams, we find a remarkably narrow sequence in the rotational velocity (v ϕ) versus metallicity ([Fe/H]) space for a sample of high proper-motion stars (>25 mas yr−1), which runs along Gaia Sausage/Enceladus (GSE) and the Splash substructures and is linked to the disk, spanning nearly 2 dex in [Fe/H]. Notably, a rapid increase of v ϕ from a nearly zero net rotation to ∼180 km s−1 in a narrow metallicity interval (−0.6 ≲ [Fe/H] ≲ −0.4) suggests that some of these stars emerged quickly on a short gas-depletion timescale. Through measurements of a scale height and length, we argue that these stars are distinct from those heated dynamically by mergers. This chain of high proper-motion stars provides additional support for recent discoveries suggesting that a starburst took place when the young Milky Way encountered the gas-rich GSE progenitor, which eventually led to the settling of metal-enriched gas onto the disk. © 2023. The Author(s). Published by the American Astronomical Society. | * |
dc.language | English | * |
dc.publisher | Institute of Physics | * |
dc.title | A Blueprint for the Milky Way’s Stellar Populations. IV. A String of Pearls—the Galactic Starburst Sequence | * |
dc.type | Article | * |
dc.relation.issue | 1 | * |
dc.relation.volume | 952 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | Astrophysical Journal | * |
dc.identifier.doi | 10.3847/1538-4357/acd5cb | * |
dc.identifier.wosid | WOS:001030757200001 | * |
dc.identifier.scopusid | 2-s2.0-85165623545 | * |
dc.author.google | An D. | * |
dc.author.google | Beers T.C. | * |
dc.author.google | Lee Y.S. | * |
dc.author.google | Masseron T. | * |
dc.contributor.scopusid | 안덕근(8661118800) | * |
dc.date.modifydate | 20240130115827 | * |