Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Ratzka, Th."'
Publikováno v:
Origins: From the Protosun to the First Steps of Life. Proceedings of the International Astronomical Union, Volume 345, pp. 128-131 (2020)
We present our results from a mid-infrared interferometric survey targeted at the planet-forming region in the circumstellar disks around low- and intermediate-mass young stars. Our sample consist of 82 objects, including T Tauri stars, Herbig Ae sta
Externí odkaz:
http://arxiv.org/abs/2002.05543
Autor:
Varga, J., Ábrahám, P., Chen, L., Ratzka, Th., Gabányi, K. É., Kóspál, Á., Matter, A., van Boekel, R., Henning, Th., Jaffe, W., Juhász, A., Lopez, B., Menu, J., Moór, A., Mosoni, L., Sipos, N.
Publikováno v:
A&A 617, A83 (2018)
Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially resolved, and the distribution and properties of the dust within can b
Externí odkaz:
http://arxiv.org/abs/1805.02939
Autor:
Varga, J., Gabányi, K. É., Ábrahám, P., Chen, L., Kóspál, Á., Menu, J., Ratzka, Th., van Boekel, R., Dullemond, C. P., Henning, Th., Jaffe, W., Juhász, A., Moór, A., Mosoni, L., Sipos, N.
Publikováno v:
A&A 604, A84 (2017)
Context. DG Tau is a low-mass pre-main sequence star, whose strongly accreting protoplanetary disk exhibits a so-far enigmatic behavior: its mid-infrared thermal emission is strongly time-variable, even turning the 10 $\mu$m silicate feature from emi
Externí odkaz:
http://arxiv.org/abs/1704.05675
Autor:
Gabanyi, K. E., Mosoni, L., Juhasz, A., Abraham, P., Ratzka, Th., Sipos, N., van Boekel, R., Jaffe, W.
Publikováno v:
Astronomische Nachrichten, Vol.334, Issue 9, p.912, 2013
The signatures of dust processing and grain growth - related to the formation of rocky planets - are easily seen in mid-infrared spectral features. One important diagnostic tool in this context is the silicate feature in the spectra of young stellar
Externí odkaz:
http://arxiv.org/abs/1307.3456
Autor:
Correia, S., Duchene, G., Reipurth, B., Zinnecker, H., Daemgen, S., Petr-Gotzens, M. G., Koehler, R., Ratzka, Th., Aspin, C., Konopacky, Q. M., Ghez, A. M.
Our general understanding of multiple star and planet formation is primarily based on observations of young multiple systems in low density regions like Tau-Aur and Oph. Since many, if not most, of the stars are born in clusters, observational constr
Externí odkaz:
http://arxiv.org/abs/1307.2299
Autor:
Mosoni, L., Sipos, N., Abraham, P., Moor, A., Kospal, A., Henning, Th., Juhasz, A., Kun, M., Leinert, Ch., Quanz, S. P., Ratzka, Th., Schegerer, A. A., van Boekel, R., Wolf, S.
Context: It is hypothesized that low-mass young stellar objects undergo eruptive phases during their early evolution. The outburst of V1647 Ori between 2003 and 2006 offered a rare opportunity to investigate such an accretion event. Aims: By means of
Externí odkaz:
http://arxiv.org/abs/1302.1348
Autor:
Panic, O., Ratzka, Th., Mulders, G. D., Dominik, C., van Boekel, R., Henning, Th., Jaffe, W., Min, M.
A region of roughly half of the solar system scale around the star HD 100546 is largely cleared of gas and dust, in contrast to the bright outer disc. However, some material is observed in the immediate vicinity of the star. We investigate how the du
Externí odkaz:
http://arxiv.org/abs/1203.6265
Context. We present a multi-wavelength, high-resolution observational survey of the young binary system Haro 6-10 (GV Tau, IRAS 04263+2426), which is harbouring one of the few known infrared companions. Aims. The primary goal of this project is to de
Externí odkaz:
http://arxiv.org/abs/1107.5409
The optically invisible infrared-source NGC 2264 IRS 1 is thought to be a massive young stellar object (~10 Msun). Although strong infrared excess clearly shows that the central object is surrounded by large amounts of circumstellar material, no info
Externí odkaz:
http://arxiv.org/abs/1107.0928
Autor:
Linz, H., Henning, Th., Feldt, M., Pascucci, I., van Boekel, R., Men'shchikov, A., Stecklum, B., Chesneau, O., Ratzka, Th., Quanz, S. P., Leinert, Ch., Waters, R., Zinnecker, H.
[abridged] Our knowledge of the inner structure of embedded massive young stellar objects is still quite limited. We attempt here to overcome the spatial resolution limitations of conventional thermal infrared imaging. We employed mid-infrared interf
Externí odkaz:
http://arxiv.org/abs/0907.0445