Poster abstract
Star Formation as seen by the Herschel HOBYS key program
Abstract
With its unprecedented spatial resolution and high sensitivity, Herschel is revolutionising our understanding of high mass star formation in the far-infrared to submillimetre regime. The Herschel imaging survey of OB Young Stellar objects (HOBYS) key program (see Motte, Zavagno, Bontemps et al, http://starformation-herschel.iap.fr/hobys/) specifically targets nearby burgeoning young stellar objects. HOBYS aims to discover and characterise the earliest evolutionary stages of intermediate to high-mass stars and assess the importance of triggering in these regions.
I will present multi-wavelength PACS (70, 160~$\mu$m) and SPIRE (250, 350, 500~$\mu$m) Herschel images of a number of early targets of the HOBYS program including, the Vela and M16 regions. Dust temperature and density maps have revealed a temperature gradient in the molecular clouds. Herschel also provides unique coverage of the spectral energy distribution peak, significantly constraining fits and thus determination of the temperature, mass and luminosity of the individual protostars identified in the regions. Using these fundamental parameters we can examine evolutionary scenarios of clusters as well as individual protostars seen within each of the regions of interest. The fundamental properties (luminosity and mass) of YSOs in the HOBYS fields will be used to constrain their evolutionary stage and lifetime of intermediate- and high-mass YSOs, ultimately improving our understanding of high-mass star formation.
I will present multi-wavelength PACS (70, 160~$\mu$m) and SPIRE (250, 350, 500~$\mu$m) Herschel images of a number of early targets of the HOBYS program including, the Vela and M16 regions. Dust temperature and density maps have revealed a temperature gradient in the molecular clouds. Herschel also provides unique coverage of the spectral energy distribution peak, significantly constraining fits and thus determination of the temperature, mass and luminosity of the individual protostars identified in the regions. Using these fundamental parameters we can examine evolutionary scenarios of clusters as well as individual protostars seen within each of the regions of interest. The fundamental properties (luminosity and mass) of YSOs in the HOBYS fields will be used to constrain their evolutionary stage and lifetime of intermediate- and high-mass YSOs, ultimately improving our understanding of high-mass star formation.