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Your search keyword '"Pontoppidan, K.M."' showing total 22 results
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22 results on '"Pontoppidan, K.M."'

1. An Ice Age JWST inventory of dense molecular cloud ices

Author

McClure, M.K., Rocha, W.R.M., Pontoppidan, K.M., Crouzet, N., Chu, L.E.U., Dartois, E., Lamberts, T., Noble, J.A., Pendleton, Y.J., Perotti, G., Qasim, D., Rachid, M.G., Smith, Z.L., Sun, F.W., Beck, T.L., Boogert, A.C.A., Brown, W.A., Caselli, P., Charnley, S.B., Cuppen, H.M., Dickinson, H., Drozdovskaya, M.N., Egami, E., Erkal, J., Fraser, H., Garrod, R.T., Harsono, D., Ioppolo, S., Jimenez-Serra, I., Jin, M., Jorgensen, J.K., Kristensen, L.E., Lis, D.C., McCoustra, M.R.S., McGuire, B.A., Melnick, G.J., Oberg, K., Palumbo, M.E., Shimonishi, T., Sturm, J.A., Dishoeck, E.F. van, Linnartz, H., McClure, M.K., Rocha, W.R.M., Pontoppidan, K.M., Crouzet, N., Chu, L.E.U., Dartois, E., Lamberts, T., Noble, J.A., Pendleton, Y.J., Perotti, G., Qasim, D., Rachid, M.G., Smith, Z.L., Sun, F.W., Beck, T.L., Boogert, A.C.A., Brown, W.A., Caselli, P., Charnley, S.B., Cuppen, H.M., Dickinson, H., Drozdovskaya, M.N., Egami, E., Erkal, J., Fraser, H., Garrod, R.T., Harsono, D., Ioppolo, S., Jimenez-Serra, I., Jin, M., Jorgensen, J.K., Kristensen, L.E., Lis, D.C., McCoustra, M.R.S., McGuire, B.A., Melnick, G.J., Oberg, K., Palumbo, M.E., Shimonishi, T., Sturm, J.A., Dishoeck, E.F. van, and Linnartz, H.

Abstract

Item does not contain fulltext

Published
2023

8. PAHs in Circumstellar Disks Around T Tauri Stars

Author

Geers, V.C., Augereau, J.-C., Pontoppidan, K.M., Dullemond, C.P., Visser, R., Boogert, A.C.A., Kessler-Silacci, J., Lahuis, F., and Dishoeck, E.F. van

Abstract

LPI Contribution No. 1286

Published
2005

9. Hot Organic Chemistry in the Inner Part of Protoplanetary Disks

Author

Lahuis, F., Dishoeck, E.F. van, Pontoppidan, K.M., Lommen, D.J., Hogerheijde, M.R., Boogert, A.C.A., Blake, G.A., Dullemond, C.P., Jørgensen, J.K., Wilner, D.J., Kessler-Silacci, J., Knez, C., and Evans, N.J.

Abstract

LPI Contribution No. 1286

Published
2005

19. Dust, Ice, and Gas In Time (DIGIT) Herschel program first results:a full PACS-SED scan of the gas line emission in protostar DK Chamaeleontis

Author

van Kempen, T. A., Green, J. D., Evans, N. J., II, van Dishoeck, E. F., Kristensen, L. E., Herczeg, G. J., Merín, B., Lee, J. -E., Jørgensen, Jes Kristian, Bouwman, Jildau, Acke, B., Adamkovics, M., Augereau, J. C., Bergin, E., Blake, G. A., Brown, P. M. J., Carr, J. S., Chen, J. -H., Cieza, L., Dominik, C., Dullemond, C. P., Dunham, M. M., Glassgold, A., Guedel, M., Harvey, P. M., Henning, Th., Hogerheijde, M. R., Jaffe, D., Kim, H. J., Knez, Claudia, Lacy, J. H., Maret, S., Meeus, G., Meijerink, R., Mulders, G. D., Mundy, L., Najita, J., Olofsson, J., Pontoppidan, K.M., Salyk, Colette, Sturm, B., Visser, R., Waters, L. B. F. M., Waelkens, C., Yildiz, U. A., van Kempen, T. A., Green, J. D., Evans, N. J., II, van Dishoeck, E. F., Kristensen, L. E., Herczeg, G. J., Merín, B., Lee, J. -E., Jørgensen, Jes Kristian, Bouwman, Jildau, Acke, B., Adamkovics, M., Augereau, J. C., Bergin, E., Blake, G. A., Brown, P. M. J., Carr, J. S., Chen, J. -H., Cieza, L., Dominik, C., Dullemond, C. P., Dunham, M. M., Glassgold, A., Guedel, M., Harvey, P. M., Henning, Th., Hogerheijde, M. R., Jaffe, D., Kim, H. J., Knez, Claudia, Lacy, J. H., Maret, S., Meeus, G., Meijerink, R., Mulders, G. D., Mundy, L., Najita, J., Olofsson, J., Pontoppidan, K.M., Salyk, Colette, Sturm, B., Visser, R., Waters, L. B. F. M., Waelkens, C., and Yildiz, U. A.

Published
2010

21. Uncovering the ingredients for planet formation

Author

Bosman, A.D., Dishoeck, E.F. van, Tielens, A.G.G.M., Röttgering, H.J.A., Brandl, B.R., Bergin, E.A., Najita, J.R., Pontoppidan, K.M., and Leiden University

Subjects
Proto-planetary disks, Line formation, Radiative transfer, Astrochemistry
Abstract

This thesis discusses the physical and chemical processes than influence the composition of forming planets. The focus is on the effect of these processes on the abundance and distribution of moleculus in the birth places of planets, proto-planetary disks. The thesis further discusses how current and future observations can be used to quantify the effects of these processes. A good grasp of these processes will enable researchers to link the composition of (exo)planets to their formation origin. Specifically this thesis studies the the most abundant carbon and oxygen carrying molecules, CO, CO2 and H2O. Chemical modelling of CO indicates that conversion of CO into other molecules needs to be fast to explain the current observations. Study of the transport and distribution of CO2 indicate that the measured the CO2 abundance in the surface layers of disks is not bulk CO2 abundance. The power of spectroscopic CO observations in the infrared to find physical structures in disks, possibly created by planets is also discussed. Finally, a combination of infrared observations is used to show that the closest proto-planetary disk is poor in molecules that contain carbon and oxygen, indicating that a process is removing these molecules from the gas phase.

Published
2019

22. Observational constraints on the evolution of dust in protoplanetary disks

Author

Martins e Oliveira, I., Dishoeck, E.F. van, Pontoppidan, K.M., and Leiden University

Subjects
Protoplanetary disks, Young stars, Method: statistical, Stellar characteristics, Astrophysics::Solar and Stellar Astrophysics, Dust, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Infrared spectroscopy, Astrophysics::Galaxy Astrophysics
Abstract

This thesis focuses on the interplay of the young star and its protoplanetary disk, on the evolution of the dust particles that make up the protoplanetary disk surrounding the young star, and thus on the very first stage of the formation of planets like those that compose our own Solar system.

Published
2011

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