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- W1566251256 abstract "A star embedded in a molecular cloud will produce an H II region surrounded by a region of photodissociated atomic gas. We constructed spherical models of the photodissociation (or photon-dominated) region by calculating the balance of photodissociation and formation of H2. The calculation of the photodissociation rate of H2 includes the Lyman and Werner transitions from the 256 bound levels of the ground state. Collisions with H and H2, and quadrupole radiative transitions are included in the calculation of the ground state levels. The UV radiation from the central star is attenuated by dust absorption and self-shielding by H2. GGD 14 is an active star forming region with a compact cometary-shaped H II region (∼0.1 pc) excited by a B0.5 ZAMS star. Gomez et al. (2010) observed the warm 21-cm emission surrounding the H II region with the VLA C configuration on Dec. 23,1998. Upon subtraction of the continuum, an absorption dip appears between 0 and 11 km s. The VLSR of the ambient molecular gas was assumed to be 11 km s" @default.
- W1566251256 created "2016-06-24" @default.
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- W1566251256 date "2011-10-01" @default.
- W1566251256 modified "2023-10-03" @default.
- W1566251256 title "MODELS OF EXPANDING PHOTODISSOCIATION REGIONS" @default.
- W1566251256 hasPublicationYear "2011" @default.
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