TY - GEN
T1 - Molecular line tracers of high-mass star forming regions
AU - Nagy, Zsofia
AU - Van der Tak, Floris
AU - Ossenkopf, Volker
AU - Bergin, Edwin
AU - Black, John
AU - Faure, Alexandre
AU - Fuller, Gary
AU - Gerin, Maryvonne
AU - Goicoechea, Javier
AU - Joblin, Christine
AU - Le Bourlot, Jacques
AU - Le Petit, Franck
AU - Makai, Zoltan
AU - Plume, Rene
AU - Roellig, Markus
AU - Spaans, Marco
AU - Tolls, Volker
PY - 2013/7
Y1 - 2013/7
N2 - High-mass stars influence their environment in different ways including
feedback via their FUV radiation. The penetration of FUV photons into
molecular clouds creates Photon Dominated Regions (PDRs) with different
chemical layers where the mainly ionized medium changes into mainly
molecular. Different chemical layers in PDRs are traced by different
species observable at sub-mm and Far Infrared wavelengths.
In this poster we present results from two molecular line surveys. One
of them is the James Clerk Maxwell Telescope (JCMT) Spectral Legacy
Survey (SLS) toward the luminous (>10^7 L_Sun), massive (~10^6
M_Sun), and distant (11.4 kpc) star-forming region W49A. The SLS images
a 2x2 arcminute field toward W49A in the 330-373 GHz frequency range.
The detected molecular lines reveal a complex chemistry and the
importance of FUV-irradiation in the heating and chemistry of the
region. The other line survey presented in the poster is part of the
HEXOS (Herschel observations of EXtra-Ordinary Sources, PI: E. Bergin)
key program using the Herschel Space Observatory and is toward the
nearby (~420 pc) prototypical edge-on Orion Bar PDR and the dense
molecular condensation Orion S. Reactive ions, such as CH+, SH+, and
CO+, detected as a part of this line survey trace the warm (~500-1000 K)
surface region of PDRs. Spectrally resolved HIFI and spectrally
unresolved PACS spectra give constraints on the chemistry and excitation
of reactive ions in these regions.
AB - High-mass stars influence their environment in different ways including
feedback via their FUV radiation. The penetration of FUV photons into
molecular clouds creates Photon Dominated Regions (PDRs) with different
chemical layers where the mainly ionized medium changes into mainly
molecular. Different chemical layers in PDRs are traced by different
species observable at sub-mm and Far Infrared wavelengths.
In this poster we present results from two molecular line surveys. One
of them is the James Clerk Maxwell Telescope (JCMT) Spectral Legacy
Survey (SLS) toward the luminous (>10^7 L_Sun), massive (~10^6
M_Sun), and distant (11.4 kpc) star-forming region W49A. The SLS images
a 2x2 arcminute field toward W49A in the 330-373 GHz frequency range.
The detected molecular lines reveal a complex chemistry and the
importance of FUV-irradiation in the heating and chemistry of the
region. The other line survey presented in the poster is part of the
HEXOS (Herschel observations of EXtra-Ordinary Sources, PI: E. Bergin)
key program using the Herschel Space Observatory and is toward the
nearby (~420 pc) prototypical edge-on Orion Bar PDR and the dense
molecular condensation Orion S. Reactive ions, such as CH+, SH+, and
CO+, detected as a part of this line survey trace the warm (~500-1000 K)
surface region of PDRs. Spectrally resolved HIFI and spectrally
unresolved PACS spectra give constraints on the chemistry and excitation
of reactive ions in these regions.
UR - http://adsabs.harvard.edu/abs/2013prpl.conf1B023N
M3 - Conference contribution
SP - 1
BT - Protostars and Planets VI, Heidelberg, July 15-20, 2013. Poster #1B023
ER -