HEИндивидуална стипендия2023–2025

GALYKOS · Galactic ArchaeoLoGy based on K-band and Optical Spectroscopy

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-01-09 → 2025-01-08
Финансиране от ЕС: 199 441 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

Звездите в центъра на спирални галактики, подобни на Млечния път, се анализират чрез спектроскопия. Това помага да се разбере реалната форма на галактичния диск и как са се формирали тези системи.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Galactic ArchaeoLoGy based on K-band and Optical Spectroscopy

GALYKOS - Galactic ArchaeoLoGy based on K-band and Optical Spectroscopy - offers an unprecedented view into the central region of spiral galaxies and aims to dissect and discriminate the different stellar populations herein. Its motivation relies on the fact that the typically adopted model describing the stellar disk of spiral galaxies assumes an exponentially increasing stellar surface density, which was never observationally established. This assumption has serious implications, severely affecting the assessment of other stellar components which co-inhabit galactic centers. An appropriate characterization of the various central stellar populations will additionally discriminate between different formation scenarios for this galaxy type. When complete, this project will provide clear observational evidence for the shape of the inner disk in galaxies like our own Milky Way, consequently shedding light on the formation of spiral galaxies.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The standard paradigm of the build-up of spiral galaxies recognises a two-phase scenario that comprises a quasi-monolithic formation of the bulge early-on, followed by the gradual assembly of the disk. However, recent observational evidence strongly suggests joint formation and perpetual co-evolution of both structures. Elucidating this process in its full complexity is of key astrophysical relevance and only possible through accurate characterisation of the main stellar components (bulge, disk and bar). These are primarily studied via photometric decomposition techniques, conventionally by extrapolating the exponential profile of the disk up to the galactic centre. Though hardly ever questioned, this is a strong assumption with broad and far-reaching implications, which could effectively be violated, particularly if the disk evolves in tandem with the bulge. Our latest work, Breda et al. (2020b), provided, for the first time, indirect observational evidence for a central down-bending of the disk, reinforcing theoretical predictions. This project, GALYKOS, will pioneer an unprecedented exploration of the central region of spiral galaxies through the combination of two techniques, i.e., spatially resolved spectral synthesis and kinematical Schwarzschild orbital decomposition of optical and K-band integral field spectroscopy data. This innovative methodology will permit to quantitatively constrain the true structure of the disk within the galactic centre and explore its dependence on the physical properties of spirals, revolutionizing photometric decomposition studies. Apart from opening new routes for the exploration of the assembly history of galaxies, this action will prompt for conceptual changes in our understanding of galaxy formation and evolution. Finally, it will rectify well-established galaxy scaling relations such as super-massive black hole vs. bulge and yield crucial insight into the nature of bulgeless galaxies, a remaining challenge for the ΛCDM model.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITAT WIEN · WienКоординаторАвстрия