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Young Stellar Objects
Review written by Péter Ábrahám
Team: P. Ábrahám, E. Elek, Cs. Kiss, S. Király, Á. Kóspál, M. Kun, A. Moór, L.
Mosoni, Zs. Regály, J. Szulágyi
Stars are formed by gravitational collapse of dense gas condensations in the interstellar space. Figure 1 is an image
of the Elephant's Trunk Nebula (a globule in IC 1396) where protostars are visible as bright redish dots mostly along the southern rim
of the globule.
A protostar collects its mass via accretion. Due to angular momentum constrains the infalling material cannot reach
directly the stellar surface but flows through a flattened circumstellar structure. Such a disk is
seen... (more)
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15 years after the first high quality data set of IRAS, the Infrared Space Observatory (ISO) made a significant new contribution
to the study of the infrared SEDs of pre-main sequence stars. At KISAG we work on the collection, analysis, and publication of all
infrared photometric data of young stars obtained with ISOPHOT, the photometer on-board ISO. The ISOPHOT results are compared and
combined with data from other infrared data sets (
IRAS,
MSX,
2MASS). A description of this long-term programme
can be found in Ábrahám (2002).
We are also interested in variability studies of pre-main-sequence stars both at optical and infrared wavelengths. Our third major topic
is related to the history and spatial distribution of star formation in individual star forming regions.
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On-going projects
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Participants |
Project Page |
| ISOPHOT-S mid-infrared spectral atlas of YSOs |
Ábrahám, P., Kun, M., Acosta-Pulido, J.A., Henning, Th.,
Leinert, Ch., Przygodda, F.
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| Photometric catalog of infrared observations of YSOs obtained with ISOPHOT |
Ábrahám, P., Moór, A., Csizmadia, Sz., Csengeri, T.,
Juhász, A., Kóspál, Á.
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| Mid-infrared observations of YSOs with UKIRT/MAX |
Juhász, A., Ábrahám, P., Ligori, S.
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| Temporal variations of UX Orionis stars at infrared wavelengths |
Juhász, A., Ábrahám, P., Prusti, T.
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| Star formation in the LDN 1251 dark cloud |
Kun, M., Prusti, T., Ábrahám, P., Moór, A.
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| Star formation in the LDN 1188 dark cloud |
Könyves, V., Moór, A., Kiss, Cs., Ábrahám, P.
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| Circumstellar structure of binary TTauri stars |
Csengeri, T., Ábrahám, P., Leinert, Ch.
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Previous projects
| Title |
Participants |
Project Page |
| The disappearing act of KH 15D: photometric results from 1995 to 2004 |
Hamilton, C.M., Herbst, W., Vrba, F.J., Ibrahimov, M.A., Mundt, R., Bailer-Jones, C.A.L.,
Sanchez Bejar, V.J., Ábrahám, P., Kun, M., Moór, A., Benko, J., Csizmadia, S.,
Filippenko, A.V., Li, W.
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| Far-infrared photometry and mapping of Herbig Ae/Be stars with ISO |
Ábrahám, P., Leinert, Ch., Burkert, A., Henning, Th., Lemke, D.
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