Detection of the self-regulation of star formation in galaxy discs

Zaragoza-Cardiel, Javier; Fritz, Jacopo; Aretxaga, Itziar; Mayya, Divakara; Rosa-González, Daniel; Beckman, John E.; Bruzual, Gustavo; Charlot, Stephane; Lomelí-Núñez, Luis
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society: Letters, Volume 487, Issue 1, p.L61-L66

Fecha de publicación:
6
2019
Número de autores
9
Número de autores del IAC
1
Número de citas
10
Número de citas referidas
9
Descripción
Stellar feedback has a notable influence on the formation and evolution of galaxies. However, direct observational evidence is scarce. We have performed stellar population analysis using MUSE optical spectra of the spiral galaxy NGC 628 and find that current maximum star formation in spatially resolved regions is regulated according to the level of star formation in the recent past. We propose a model based on the self-regulator or `bathtub' models, but for spatially resolved regions of the galaxy. We name it the `resolved self-regulator model' and show that the predictions of this model are in agreement with the presented observations. We observe star formation self-regulation and estimate the mass-loading factor, η = 2.5 ± 0.5, consistent with values predicted by galaxy formation models. The method described here will help provide better constraints on those models.
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El objetivo básico del proyecto es investigar la evolución de las galaxias mediante el entendimiento de la interacción del medio interestelar y las estrellas. La técnica principal que utilizamos es la cinemática bidimensional de galaxias enteras observada por nuestro instrumento GHaFaS, un interferometro Fabry Perot en el telescopio William
Prof.
John E. Beckman