NGUYEN LUONG, Quang,; FRÉDÉRIQUE, Motte; NGUYEN, Hans,; SCHNEIDER, N.; LOUVET, Fabien,

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NGUYEN LUONG, Quang,

FRÉDÉRIQUE, Motte
Procédés, Matériaux et Energie Solaire [PROMES]

NGUYEN, Hans,
MICrobiologie de l'ALImentation au Service de la Santé [MICALIS]

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Ce document a été publié dans

2015IAUGA..2255299N - IAU General Assembly, Meeting #29, #2255299 - held 4-8 January 2015 in Seattle, USA, 2015-01-04, Seattle. 2015-08, vol. 22, p. 55299

Résumé en anglais

To connect local to global star formation, we compare the mass, size, line width, and star formation rate (SFR) density of cloud structures ranging from Galactic clouds ($\sim$1--10~pc in size) to galaxies (with $\sim$1--10~kpc sizes).Our focus is on molecular cloud structures, called massive complexes, which have intermediate sizes of $\sim$100~pc and masses larger than $10^6~\msun$.We propose using a starburstiness quantity $\zeta$ to quantify the star formation intensity of a molecular cloud complex, or how much its SFR deviates from the star formation relations such as Kennicutt and Lada ones. For molecular cloud complex that has $\zeta>3$ , we call it mini-starburst complex, otherwise normal or main-sequence complex. This $\zeta>3$ threshold leads to a SFR threshold. Most complexes can be classified as ministarburst as having $\zeta>3$. We propose that mini-starburst events represent an enhancement of the star formation activity, following dynamic events such as compression, colliding flows, or agglomeration which compress materials within a cloud complex.< Réduire

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Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804