Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..dmp.g1039a&link_type=abstract
American Physical Society, 37th Meeting of the Division of Atomic, Molecular and Optical Physics, May 16-20, 2006, abstract #G1.
Physics
Scientific paper
H2 is the most abundant molecule in the universe and is an active component of star formation. Intense H2 transitions in the visible optical near Infrared (VOIR) spectral region from various vibrational levels have been observed in highly-collimated jets of matter from young stellar objects [1]. In recent work, we have demonstrated [2] that the gerade series (EF, GK, H^1&+circ;g, I^1πg, J^1δg...) makes a significant contribution to the UV spectrum of H2 via its cascade spectrum in the VOIR to the n = 2pσB and 2pπC states, the upper states of the Lyman and Werner bands, respectively. We present the measured electron-impact-induced emission spectrum of H2 in the VOIR region 700 nm to 950 nm at a spectral resolution of 2 nm (FWHM). A model spectrum of H2 including rovibrational coupling for the strongest band systems is in excellent agreement with observed intensities. [1] Nisini et al.,A&A,441,159-170,(2005) [2] Liu et al.,Astrophys.J.Suppl.,138,229(2002) and J.Phys.B, 36,173(2003).
Abgrall Hervé
Aguilar Alejandro
Ajello Joseph M.
James Geoffrey K.
Roueff Evelyne
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