Hostname: page-component-7bb8b95d7b-fmk2r Total loading time: 0 Render date: 2024-09-24T08:02:46.380Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations of hydrocarbon emission in disks around young stars

Published online by Cambridge University Press:  30 March 2011

C. Joblin ,
A.G.G.M. Tielens  and
B. Acke
B. Acke*
Affiliation:
Instituut voor Sterrenkunde, University of Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium. e-mail: bram@ster.kuleuven.be ; Postdoctoral Fellow of the Fund for Scientific Research, Flanders

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

I give an overview of the recent scientific results based on observations of PAH emission from circumstellar disks around young stars. The stellar radiation field plays a key role in the excitation and destruction of the PAH molecules in the disk. The detection rate of PAH emission in disks is optimal for stars of spectral type A. Around stars of similar temperature, the disk structure determines the PAH emission strength: disks with a flared geometry produce stronger PAH emission than flattened disks. The spectral properties of the emission features, indicative of the chemistry of the emitting hydrocarbons, is closely linked to the central star radiation field. The main PAH features shift to redder wavelengths with decreasing stellar effective temperature. This trend has been interpreted as an indication for a higher aliphatic/aromatic ratio of the hydrocarbon mixture around cool stars with respect to hot stars. An alternative explanation may be a more significant contribution to the infrared emission of very small grains around cooler stars.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 46: PAHs and the Universe: A Symposium to Celebrate the 25th Anniversary of the PAH Hypothesis , 2011 , pp. 259 - 269
Copyright
© EAS, EDP Sciences 2011

References

Acke, B., & van den Ancker, M.E., 2004, A&A, 426, 151
Acke, B., Min, M., van den Ancker, M.E., et al., 2009, A&A, 502, L17
Acke, B., Bouwman, J., Juhász, A., et al., 2010, ApJ, 718, 558 CrossRef
Bauschlicher, C.W., Peeters, E., & Allamandola, L.J., 2008, ApJ, 678, 316 CrossRef
Bauschlicher, C.W., Peeters, E., & Allamandola, L.J., 2009, ApJ, 697, 311 CrossRef
Berné, O., Joblin, C., Deville, Y., et al., 2007, A&A, 469, 575
Berné, O., Joblin, C., Fuente, A., & Ménard, F., 2009, A&A, 495, 827
Boersma, C., Bouwman, J., Lahuis, F., et al., 2008, A&A, 484, 241
Bouwman, J., Henning, T., Hillenbrand, L.A., et al., 2008, ApJ, 683, 479 CrossRef
Cesarsky, D., Lequeux, J., Ryter, C., & Gérin, M., 2000, A&A, 354, L87
Chiang, E.I., & Goldreich, P., 1997, ApJ, 490, 368 CrossRef
Chiar, J.E., Tielens, A.G.G.M., Whittet, D.C.B., et al., 2000, ApJ, 537, 749 CrossRef
Dartois, E., Geballe, T.R., Pino, T., et al., 2007, A&A, 463, 635
de Graauw, T., Haser, L.N., Beintema, D.A., et al., 1996, A&A, 315, L49
Doucet, C., Habart, E., Pantin, E., et al., 2007, A&A, 470, 625
Dullemond, C.P., Dominik, C., & Natta, A., 2001, ApJ, 560, 957 CrossRef
Dullemond, C.P., & Dominik, C., 2004, A&A, 417, 159
Dullemond, C.P., Henning, T., Visser, R., et al., 2007, A&A, 473, 457
Fedele, D., van den Ancker, M.E., Acke, B., et al., 2008, A&A, 491, 809
Fedele, D., van den Ancker, M.E., Henning, T., et al., 2010, A&A, 510, A72
Furlan, E., Hartmann, L., Calvet, N., et al., 2006, ApJS, 165, 568 CrossRef
Furton, D.G., Laiho, J.W., & Witt, A.N., 1999, ApJ, 526, 752 CrossRef
Geers, V.C., Augereau, J., Pontoppidan, K.M., et al., 2006, A&A, 459, 545
Geers, V.C., 2007, Ph.D. Thesis, Leiden Observatory, Leiden University
Geers, V.C., van Dishoeck, E.F., Visser, R., et al., 2007, A&A, 476, 279
Geers, V.C., van Dishoeck, E.F., Pontoppidan, K.M., et al., 2009, A&A, 495, 837
Habart, E., Verstraete, L., Boulanger, F., et al., 2001, A&A, 373, 702
Habart, E., Natta, A., & Krügel, E., 2004a, A&A, 427, 179
Habart, E., Testi, L., Natta, A., & Carbillet, M., 2004b, ApJ, 614, L129 CrossRef
Habart, E., Natta, A., Testi, L., & Carbillet, M., 2006, A&A, 449, 1067
Herbig, G.H., 1960, ApJS, 4, 337 CrossRef
Hony, S., Van Kerckhoven, C., Peeters, E., et al., 2001, A&A, 370, 1030
Houck, J.R., Roellig, T.L., van Cleve, J., et al., 2004, ApJS, 154, 18 CrossRef
Joblin, C., Szczerba, R., Berné, O., & Szyszka, C., 2008, A&A, 490, 189
Keller, L.D., Sloan, G.C., Forrest, W.J., et al., 2008, ApJ, 684, 411 CrossRef
Kessler, M.F., Steinz, J.A., Anderegg, M.E., et al., 1996, A&A, 315, L27
Lagage, P.O., Doucet, C., Pantin, E., et al., 2004, The Messenger, 117, 12
Lagage, P., Pel, J.W., Authier, M., et al., 2006, Science, 314, 621 CrossRef
Meeus, G., Waters, L.B.F.M., Bouwman, J., et al., 2001, A&A, 365, 476
Meeus, G., Pinte, C., Woitke, P., et al., 2010, A&A, 518, 124
Meijer, J., Dominik, C., de Koter, A., et al., 2008, A&A, 492, 451
Oliveira, I., Pontoppidan, K.M., Merín, B., et al., 2010, ApJ, 714, 778 CrossRef
Peeters, E., Hony, S., Van Kerckhoven, C., et al., 2002, A&A, 390, 1089
Pino, T., Dartois, E., Cao, A., et al., 2008, A&A, 490, 665
Preibisch, T., Kim, Y., Favata, F., et al., 2005, ApJS, 160, 401 CrossRef
Quanz, S.P., Henning, T., Bouwman, J., et al., 2007, ApJ, 668, 359 CrossRef
Rapacioli, M., Joblin, C., & Boissel, P., 2005, A&A, 429, 193
Siebenmorgen, R., & Krügel, E., 2010, A&A, 511, A6
Sloan, G.C., Keller, L.D., Forrest, W.J., et al., 2005, ApJ, 632, 956 CrossRef
Sloan, G.C., Jura, M., Duley, W.W., et al., 2007, ApJ, 664, 1144 CrossRef
Sloan, G.C., 2008, in IAU Symposium, ed. S. Kwok & S. Sandford, 251, 191
Stelzer, B., Micela, G., Hamaguchi, K., & Schmitt, J.H.M.M., 2006, A&A, 457, 223
van Boekel, R., Waters, L.B.F.M., Dominik, C., et al., 2004, A&A, 418, 177
van der Plas, G., van den Ancker, M.E., Fedele, D., et al., 2008, A&A, 485, 487
Verhoeff, A.P., Min, M., Acke, B., et al., 2010, A&A, 516, A48
Visser, R., Geers, V.C., Dullemond, C.P., et al., 2007, A&A, 466, 229