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Probing our Galaxy from the Center to the outskirts

Supermassive black holes — located in galactic nuclei— and dark matter —dominant in galactic halos— are vital ingredients in the cosmological process of galaxy formation, including that of our own Galaxy. However, probing our Gala... ver más

31/08/2027

ULEI

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

UNIVERSITEIT LEIDEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Ver 2 Participantes

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2021-01-20

ERC-2020-COG: ERC CONSOLIDATOR GRANTS

I+D

Cerrada hace 4 años

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2 Participantes

ULEI

2.00M€ | Lider

LA INDUSTRIAL CERRAJERA

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Duración del proyecto: 79 meses Fecha Inicio: 2021-01-20
Fecha Fin: 2027-08-31

Líder del proyecto

UNIVERSITEIT LEIDEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Descripción del proyecto Supermassive black holes — located in galactic nuclei— and dark matter —dominant in galactic halos— are vital ingredients in the cosmological process of galaxy formation, including that of our own Galaxy. However, probing our Galactic Centre (GC) and halo has proven observationally challenging. Hypervelocity stars (HVSs) are unique in that they deliver key information on both. Following interactions with black holes in the vicinity of Sagittarius A*, HVSs are ejected on fast trajectories through the halo. They thus bear testimony not only to the black hole and stellar populations within the hard-to-access innermost parsec, but also to the Galactic mass distribution, imprinted on their orbits. Exploiting HVSs, however, has been limited by the paucity and quality of data. The ESA Gaia mission and new spectroscopic surveys are about to dramatically change this. Their upcoming data releases contain a few hundred HVSs with unprecedented astrometric measurements, but identifying them requires careful analysis of the basic data. This proposal capitalises on my comprehensive theoretical, observational and data mining work on SDSS and previous Gaia data. The proposal unprecedentedly combines three key facets: i) identifying and characterising HVSs; ii) modelling HVS data in a full statistical framework and theoretically interpreting our results for the GC; and iii) performing a joint analysis with complementary Galactic halo probes, never observed so abundantly before Gaia. The project will yield i) ~hundred of GC stars in a complementary mass range and with more robust parameter estimation than from direct GC observations; ii) the population of black holes in the GC and their dynamics; iii) robust ~10% precision measurements of the Galaxy mass distribution. These will allow not only to discriminate between assembly scenarios for both the Milky Way and its GC, but also to uniquely calibrate rate estimates for galactic nuclear phenomena, including gravitational wave sources.

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