Structure and Substructure of Galactic Spheroids - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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Abstract: The full spatio-chemo-dynamical structure of galaxies of all types andenvironments at low redshift provides a critical accompaniment to observationsof galaxy formation at high redshift. The next decade brings the observationalopportunity to strongly constrain nearby galaxies- histories of star formationand assembly, especially in the spheroids that comprise the large majority ofthe stellar mass in the Universe but have until now been difficult to study. Inorder to constrain the pathways to building up the spheroidal -red-sequence-,various standard techniques in photometry and spectroscopy, particularly withresolved tracer populations like globular clusters and planetary nebulae, canbe scaled up to comprehensive surveys as improved wide-field instrumentation isincreasingly available. At the same time, progress in adaptive optics on gianttelescopes could for the first time permit deep, resolved photometric andspectroscopic analysis of large samples of individual stars in these systems,thereby revolutionizing galaxy studies. Strong theoretical support is needed inorder to understand the new observational constraints via detailed modeling andself-consistent simulations of star and galaxy formation throughout cosmictime.



Autor: Aaron J. Romanowsky, Jean P. Brodie, James S. Bullock, Robin Ciardullo, Puraga Guhathakurta, Loren Hoffman, Knut A. G. Olsen, Joe

Fuente: https://arxiv.org/



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