Nordic-Baltic Astronomy Summer School Tuorla 8 - 18 June 2009
Lecture 1
Bo Reipurth University of Hawaii WARNING/DISCLAIMER
This lecturer is seriously jet-lagged. His utterances are likely to contain much nonsense The Star Formation Newsletter
Abstracts Dissertation abstracts Meetings Jobs New Books Announcements
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http://www.ifa.hawaii.edu/users/reipurth/newsletter.htm PPV
University of Arizona Press 2007
Comprehensive reviews of star and planet formation HANDBOOK OF STAR FORMING REGIONS Astronomical Society of the Pacific, 2009 - 2000 pages - 105 authors 60 star forming regions within 2 kpc The Birth of Stars and Planets
John Bally & Bo Reipurth
Cambridge University Press, 2007
Detection of Hα emission stars using objective prism
Reipurth et al. 2004
Infrared colors of Hα stars in NGC 2264 from 2MASS
Reipurth et al. 2004 Relation between Hα emission and IR excess
Carpenter et al. 2001 Periodic variability of young stars in Orion
Doppler images of the T Tauri star V410 Tau at four different phases. The dark spots are regions that are cooler than the surrounding photosphere by at least 500 K. Herbst et al. 2000 VYSOS
A 20 inch telescope in Hawaii, and a 16 inch telescope in Chile, that monitor all star forming regions along the Galactic Plane. The field of view is 30 x 30 arcmin, with 0.45 arcsec pixels.
Proplyds in Orion
Basic concept of magnetospheric accretion in T Tauri stars
Camenzind 1990
Reipurth, Pedrosa, Lago 1996
X-Z slice through the middle of the funnel stream at = 15°. The contour lines show the plane cross section of the density distribution inside the funnel stream. The density changes exponentially from = 0.2 (blue) to = 2.0 (red).
Red lines with arrows show selected magnetic field lines. The rotation axis, Ω, and the magnetic moment, μ, are shown.
Romanova et al. 2004 Simulations by Marina Romanova The gas in the funnel flows crashes into the stellar photosphere and deposits potential energy in the upper layers. Variations in the infall leads to variability in the hot spot, and changes in the veiling The hot spot changes as the infalling gas moves around Variability of Funnel Flows
Frame rotating with star From some lines-of-sight the funnels can completely obscure the star Lamm et al. 2005