Zobrazeno 1 - 10
of 2 512
pro vyhledávání: '"Kaufman, M J"'
Autor:
Pon, A., Kaufman, M. J., Johnstone, D., Caselli, P., Fontani, F., Butler, M. J., Jiménez-Serra, I., Palau, A., Tan, J. C.
Publikováno v:
ApJ 827, 107 (2016)
Giant molecular clouds contain supersonic turbulence that can locally heat small fractions of gas to over 100 K. We run shock models for low-velocity, C-type shocks propagating into gas with densities between 10^3 and 10^5 cm^(-3) and find that CO li
Externí odkaz:
http://arxiv.org/abs/1606.03089
Autor:
Karska, A., Kristensen, L. E., van Dishoeck, E. F., Drozdovskaya, M. N., Mottram, J. C., Herczeg, G. J., Bruderer, S., Cabrit, S., Evans II, N. J., Fedele, D., Gusdorf, A., Jorgensen, J. K., Kaufman, M. J., Melnick, G. J., Neufeld, D. A., Nisini, B., Santangelo, G., Tafalla, M., Wampfler, S. F.
Publikováno v:
A&A 572, A9 (2014)
Protostars interact with their surroundings through jets and winds impacting on the envelope and creating shocks, but the nature of these shocks is still poorly understood. Our aim is to survey far-infrared molecular line emission from a uniform and
Externí odkaz:
http://arxiv.org/abs/1409.4658
We model the production of OH+, H2O+, and H3O+ in interstellar clouds, using a steady state photodissociation region code that treats the freeze-out of gas species, grain surface chemistry, and desorption of ices from grains. The code includes PAHs,
Externí odkaz:
http://arxiv.org/abs/1205.6446
Autor:
Liseau, R., Goldsmith, P. F., Larsson, B., Pagani, L., Bergman, P., Bourlot, J. Le, Bell, T. A., Benz, A. O., Bergin, E. A., Bjerkeli, P., Black, J. H., Bruderer, S., Caselli, P., Caux, E., Chen, J. -H., de Luca, M., Encrenaz, P., Falgarone, E., Gerin, M., Goicoechea, J. R., Hjalmarson, Å., Hollenbach, D. J., Justtanont, K., Kaufman, M. J., Petit, F. Le, Li, D., Lis, D. C., Melnick, G. J., Nagy, Z., Olofsson, A. O. H., Olofsson, G., Roueff, E., Sandqvist, Aa., Snell, R. L., van der Tak, F. F. S., van Dishoeck, E. F., Vastel, C., Viti, S., Yıldız, U. A.
Models of pure gas-phase chemistry in well-shielded regions of molecular clouds predict relatively high levels of molecular oxygen, O2, and water, H2O. Contrary to expectation, the space missions SWAS and Odin found only very small amounts of water v
Externí odkaz:
http://arxiv.org/abs/1202.5637
Publikováno v:
ApJ 748 (2012) 25-39
Giant molecular clouds contain supersonic turbulence and simulations of magnetohydrodynamic turbulence show that these supersonic motions decay in roughly a crossing time, which is less than the estimated lifetimes of molecular clouds. Such a situati
Externí odkaz:
http://arxiv.org/abs/1201.1919
Publikováno v:
ApJ 741, 45 (2011)
We use the IRS on Spitzer to observe the southern part of the reflection nebula NGC 2023, including the Southern Ridge, which is a photodissociation region par excellence excited by HD 37903. Five pure-rotational H2 emission lines are detected and ma
Externí odkaz:
http://arxiv.org/abs/1110.4614
Autor:
Kristensen, L. E., Visser, R., van Dishoeck, E. F., Yıldız, U. A., Doty, S. D., Herczeg, G. J., Liu, F. -C., Parise, B., Jørgensen, J. K., van Kempen, T. A., Brinch, C., Wampfler, S. F., Bruderer, S., Benz, A. O., Hogerheijde, M. R., Deul, E., Bachiller, R., Baudry, A., Benedettini, M., Bergin, E. A., Bjerkeli, P., Blake, G. A., Bontemps, S., Braine, J., Caselli, P., Cernicharo, J., Codella, C., Daniel, F., de Graauw, Th., di Giorgio, A. M., Dominik, C., Encrenaz, P., Fich, M., Fuente, A., Giannini, T., Goicoechea, J. R., Helmich, F., Herpin, F., Jacq, T., Johnstone, D., Kaufman, M. J., Larsson, B., Lis, D., Liseau, R., Marseille, M., McCoey, C., Melnick, G., Neufeld, D., Nisini, B., Olberg, M., Pearson, J. C., Plume, R., Risacher, C., Santiago-Garcia, J., Saraceno, P., Shipman, R., Tafalla, M., Tielens, A. G. G. M., van der Tak, F., Wyrowski, F., Beintema, D., de Jonge, A., Dieleman, P., Ossenkopf, V., Roelfsema, P., Stutzki, J., Whyborn, N.
'Water In Star-forming regions with Herschel' (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The
Externí odkaz:
http://arxiv.org/abs/1007.3031
Autor:
van Kempen, T. A., Kristensen, L. E., Herczeg, G. J., Visser, R., van Dishoeck, E. F., Wampfler, S. F., Bruderer, S., Benz, A. O., Doty, S. D., Brinch, C., Hogerheijde, M. R., Jørgensen, J. K., Tafalla, M., Neufeld, D., Bachiller, R., Baudry, A., Benedettini, M., Bergin, E. A., 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., Kaufman, M. J., Larsson, B., Lis, D., Liseau, R., Marseille, M., McCoey, C., Melnick, G., Nisini, B., Olberg, M., Parise, B., Pearson, J. C., Plume, R., Risacher, C., Santiago-Garcia, J., Saraceno, P., Shipman, R., van der Tak, F., Wyrowski, F., Yildiz, U. A., Ciechanowicz, M., Dubbeldam, L., Glenz, S., Huisman, R., Lin, R. H., Morris, P., Murphy, J. A., Trappe, N.
'Water in Star-forming regions with Herschel' (WISH) is a Herschel Key Programme aimed at understanding the physical and chemical structure of young stellar objects (YSOs) with a focus on water and related species. The low-mass protostar HH 46 was ob
Externí odkaz:
http://arxiv.org/abs/1005.2031
Autor:
Franklin, J., Snell, R. L., Kaufman, M. J., Melnick, G. J., Neufeld, D. A., Hollenbach, D. J., Bergin, E. A.
We present SWAS detections of the ground-state 1(10)-1(01) transition of o-H2O at 557 GHz in 18 molecular outflows. These results are combined with ground-based observations of the J=1-0 transitions of 12CO and 13CO obtained at the FCRAO and, for a s
Externí odkaz:
http://arxiv.org/abs/0711.2055
HST NICMOS narrowband images of the shocked molecular hydrogen emission in OMC-1 are analyzed to reveal new information on the BN/KL outflow. The outstanding morphological feature of this region is the array of molecular hydrogen ``fingers'' emanatin
Externí odkaz:
http://arxiv.org/abs/0709.2939