Herschel/HIFI observations of high-J CO lines in the NGC 1333 low-mass star-forming region
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Herschel/HIFI observations of high-J CO lines in the NGC 1333 low-mass star-forming region. / Yildiz, U. A.; van Dishoeck, E. F.; Kristensen, L. E.; Visser, R.; Jørgensen, Jes Kristian; Herczeg, G. J.; van Kempen, T. A.; Hogerheijde, M. R.; Doty, S. D.; Benz, A. O.; Bruderer, S.; Wampfler, S. F.; Deul, E.; Bachiller, R.; Baudry, A.; Benedettini, M.; Bergin, E.; Bjerkeli, P.; Blake, G. A.; Bontemps, S.; Braine, J.; Caselli, P.; Cernicharo, J.; Codella, C.; Daniel, F.; di Giorgio, A. M.; Dominik, C.; Encrenaz, P.; Fich, M.; Fuente, A.; Giannini, T.; Goicoechea, J. R.; de Graauw, Th.; Helmich, F.; Herpin, F.; Jacq, T.; Johnstone, D.; Larsson, B.; Lis, D.; Liseau, R.; Liu, F.-C.; Marseille, M.; McCoey, C.; Melnick, G.; Neufeld, D.; Nisini, B.; Olberg, M.; Parise, B.; Pearson, J. C.; Plume, R.; Risacher, C.; Santiago-García, J.; Saraceno, P.; Shipman, R.; Tafalla, M.; Tielens, A. G. G. M.; van der Tak, F.; Wyrowski, F.; Dieleman, P.; Jellema, W.; Ossenkopf, V.; Schieder, R.; Stutzki, J.
In: Astronomy & Astrophysics, Vol. 521, 10.2010, p. L40.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Herschel/HIFI observations of high-J CO lines in the NGC 1333 low-mass star-forming region
AU - Yildiz, U. A.
AU - van Dishoeck, E. F.
AU - Kristensen, L. E.
AU - Visser, R.
AU - Jørgensen, Jes Kristian
AU - Herczeg, G. J.
AU - van Kempen, T. A.
AU - Hogerheijde, M. R.
AU - Doty, S. D.
AU - Benz, A. O.
AU - Bruderer, S.
AU - Wampfler, S. F.
AU - Deul, E.
AU - Bachiller, R.
AU - Baudry, A.
AU - Benedettini, M.
AU - Bergin, E.
AU - Bjerkeli, P.
AU - Blake, G. A.
AU - Bontemps, S.
AU - Braine, J.
AU - Caselli, P.
AU - Cernicharo, J.
AU - Codella, C.
AU - Daniel, F.
AU - di Giorgio, A. M.
AU - Dominik, C.
AU - Encrenaz, P.
AU - Fich, M.
AU - Fuente, A.
AU - Giannini, T.
AU - Goicoechea, J. R.
AU - de Graauw, Th.
AU - Helmich, F.
AU - Herpin, F.
AU - Jacq, T.
AU - Johnstone, D.
AU - Larsson, B.
AU - Lis, D.
AU - Liseau, R.
AU - Liu, F.-C.
AU - Marseille, M.
AU - McCoey, C.
AU - Melnick, G.
AU - Neufeld, D.
AU - Nisini, B.
AU - Olberg, M.
AU - Parise, B.
AU - Pearson, J. C.
AU - Plume, R.
AU - Risacher, C.
AU - Santiago-García, J.
AU - Saraceno, P.
AU - Shipman, R.
AU - Tafalla, M.
AU - Tielens, A. G. G. M.
AU - van der Tak, F.
AU - Wyrowski, F.
AU - Dieleman, P.
AU - Jellema, W.
AU - Ossenkopf, V.
AU - Schieder, R.
AU - Stutzki, J.
PY - 2010/10
Y1 - 2010/10
N2 - Herschel/HIFI observations of high-J lines (up to Ju = 10) of 12CO, 13CO and C18O are presented toward three deeply embedded low-mass protostars, NGC 1333 IRAS 2A, IRAS 4A, and IRAS 4B, obtained as part of the Water In Star-forming regions with Herschel (WISH) key program. The spectrally-resolved HIFI data are complemented by ground-based observations of lower-J CO and isotopologue lines. The 12CO 10-9 profiles are dominated by broad (FWHM 25-30 km s-1) emission. Radiative transfer models are used to constrain the temperature of this shocked gas to 100-200 K. Several CO and 13CO line profiles also reveal a medium-broad component (FWHM5-10 km s-1), seen prominently in H2O lines. Column densities for both components are presented, providing a reference for determining abundances of other molecules in the same gas. The narrow C18O 9-8 lines probe the warmer part of the quiescent envelope. Their intensities require a jump in the CO abundance at an evaporation temperature around 25 K, thus providing new direct evidence for a CO ice evaporation zone around low-mass protostars. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Appendices and acknowledgements (pages 5 to 7) are only available in electronic form at http://www.aanda.org
AB - Herschel/HIFI observations of high-J lines (up to Ju = 10) of 12CO, 13CO and C18O are presented toward three deeply embedded low-mass protostars, NGC 1333 IRAS 2A, IRAS 4A, and IRAS 4B, obtained as part of the Water In Star-forming regions with Herschel (WISH) key program. The spectrally-resolved HIFI data are complemented by ground-based observations of lower-J CO and isotopologue lines. The 12CO 10-9 profiles are dominated by broad (FWHM 25-30 km s-1) emission. Radiative transfer models are used to constrain the temperature of this shocked gas to 100-200 K. Several CO and 13CO line profiles also reveal a medium-broad component (FWHM5-10 km s-1), seen prominently in H2O lines. Column densities for both components are presented, providing a reference for determining abundances of other molecules in the same gas. The narrow C18O 9-8 lines probe the warmer part of the quiescent envelope. Their intensities require a jump in the CO abundance at an evaporation temperature around 25 K, thus providing new direct evidence for a CO ice evaporation zone around low-mass protostars. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Appendices and acknowledgements (pages 5 to 7) are only available in electronic form at http://www.aanda.org
U2 - 10.1051/0004-6361/201015119
DO - 10.1051/0004-6361/201015119
M3 - Journal article
VL - 521
SP - L40
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
ER -
ID: 35114647