Multi-object spectroscopy of massive stars in the Local Group and beyond

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Formation of the most massive stars(i) How are the most massive stars formed?(ii) What are the physical properties of the newly formedstars?- Photospheric parameters- Rotational characteristics- Radiation-driven winds- Remnant stellar disc(iii) Are massive YSOs actively accretingand how do these objects relate tothe “dusty/gaseous disc” systems? Study ionizing stars of the youngest(ultra-)compact H II regions withVLT/X-shooter, SINFONI, CRIRES,and analyze their spectra
How to make a massive star?(a) A dense, rotating central disk of dust and gas, and a highly collimatedsupersonic outflow (accretion model) (b) Stars collide and merge to form ahigh-mass star (coalescence model). Whitney 2005, Nature News & Views
Page 1 and 2: Multi-object spectroscopy of massiv
Page 3 and 4: Key questions to be addressed• Ho
Page 5 and 6: Crowther et al. (2010)
Page 7 and 8: Evidence for stars with M init > 15
Page 9: Bohannan & Conti 1976, ApJ 204, 797
Page 13: Very Large Telescope, Cerro Paranal
Page 16 and 17: Central star powering UCHIIIonizing
Page 18 and 19: Massive YSOs in RCW36Ellerbroek et
Page 20 and 21: Mass loss and accretion diagnostics
Page 22 and 23: Massive stars are born as giants: B
Page 24 and 25: SED B275:SpType B0 VL ~ 20,000 Lod
Page 26 and 27: VLT/X-shooter spectrum M17-B275Ochs
Page 28 and 29: B275: “bloated” PMS star contra
Page 30: VLT/FLAMES Tarantula Survey(Evans e
Page 33 and 34: Triggered star formation by 30 Dor
Page 35 and 36: Tramper et al. 2011, ApJ 741, L8
Page 37 and 38: First VLT/X-shooter spectrum of mas
Page 39 and 40: Obtaining spectra of O stars in Loc
Page 41 and 42: Extremely Large Telescope
Page 43 and 44: Chapman et al. (2006)Richardson et
Page 45 and 46: ANGST SurveyDalcanton et al. (2009)
Page 48 and 49: E-ELT MOS• Explore E-ELT’s larg
Page 50 and 51: RSG J-band spectra in Virgowith S/N
Page 52 and 53: ➡ E-ELT: galaxies out to 35Mpc (m
Page 54 and 55: Conclusions• With the E-ELT it wi

Multi-object spectroscopy of massive stars in the Local Group and beyond

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