Zobrazeno 1 - 10
of 2 316
pro vyhledávání: '"Köhler R"'
Publikováno v:
iForest - Biogeosciences and Forestry, Vol 2, Iss 1, Pp 1-3 (2009)
Assessing biodiversity in forests requires a reliable and sustainable monitoring concept, which must include all levels of diversity, the genetic, the species and the landscape level. Diversity studies should not be reduced to quantitative analysis,
Externí odkaz:
https://doaj.org/article/1afb730e2e6d481290e8fb364dcba865
The goal of this paper is to increase the membership list of the Chamaeleon star forming region and the $\epsilon$ Cha moving group, in particular for low-mass stars and substellar objects. We extended the search region significantly beyond the dark
Externí odkaz:
http://arxiv.org/abs/2102.05589
Autor:
GRAVITY Collaboration, Eupen, F., Labadie, L., Grellmann, R., Perraut, K., Brandner, W., Duchêne, G., Köhler, R., Sanchez-Bermudez, J., Lopez, R. Garcia, Garatti, A. Caratti o, Benisty, M., Dougados, C., Garcia, P., Klarmann, L., Amorim, A., Bauböck, M., Berger, J. P., Caselli, P., Clénet, Y., Foresto, V. Coudé du, de Zeeuw, P. T., Drescher, A., Duvert, G., Eckart, A., Eisenhauer, F., Filho, M., Ganci, V., Gao, F., Gendron, E., Genzel, R., Gillessen, S., Heissel, G., Henning, Th., Hippler, S., Horrobin, M., Hubert, Z., Jiménez-Rosales, A., Jocou, L., Kervella, P., Lacour, S., Lapeyrère, V., Bouquin, J. B. Le, Léna, P., Ott, T., Paumard, T., Perrin, G., Pfuhl, O., Rodríguez-Coira, G., Rousset, G., Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., van Dishoeck, E., Vincent, F., von Fellenberg, S. D., Widmann, F., Woillez, J., Wojtczak, A.
Publikováno v:
A&A 648, A37 (2021)
The young T Tauri star WW Cha was recently proposed to be a close binary object with strong infrared and submillimeter excess associated with circum-system emission. This makes WW Cha a very interesting source for studying the influence of dynamical
Externí odkaz:
http://arxiv.org/abs/2102.00122
Autor:
Kammerer, J., Kasper, M., Ireland, M. J., Köhler, R., Laugier, R., Martinache, F., Siebenmorgen, R., Ancker, M. E. van den, van Boekel, R., Herbst, T. M., Pantin, E., Käufl, H. -U., de la Roche, D. J. M. Petit dit, Ivanov, V. D.
T Tauri has long been the prototypical young pre-main-sequence star. However, it has now been decomposed into a triple system with a complex disk and outflow geometry. We aim to measure the brightness of all three components of the T Tauri system (T
Externí odkaz:
http://arxiv.org/abs/2012.11418
Autor:
Kasper, M., Santhakumari, K. K. R., Herbst, T. M., van Boekel, R., Menard, F., Gratton, R., van Holstein, R. G., Langlois, M., Ginski, C., Boccaletti, A., de Boer, J., Delorme, P., Desidera, S., Dominik, C., Hagelberg, J., Henning, T., Koehler, R., Mesa, D., Messina, S., Pavlov, A., Petit, C., Rickman, E., Roux, A., Rigal, F., Vigan, A., Wahhaj, Z., Zurlo, A.
Publikováno v:
A&A 644, A114 (2020)
T Tauri remains an enigmatic triple star for which neither the evolutionary state of the stars themselves, nor the geometry of the complex outflow system is completely understood. Eight-meter class telescopes equipped with state-of-the-art adaptive o
Externí odkaz:
http://arxiv.org/abs/2011.06345
Autor:
Kubiak, K., Alves, J., Bouy, H., Sarro, L. M., Ascenso, J., Burkert, A., Forbrich, J., Großschedl, J., Hacar, A., Hasenberger, B., Lombardi, M., Meingast, S., Köhler, R., Teixeira, P. S.
Publikováno v:
A&A 598, A124 (2017)
This paper continues our study of the foreground population to the Orion molecular clouds. The goal is to characterize the foreground population north of NGC 1981 and to investigate the star formation history in the large Orion star-forming region. W
Externí odkaz:
http://arxiv.org/abs/1609.04948
Publikováno v:
A&A 593, A50 (2016)
The immediate vicinity of T Tauri was observed with the new high-contrast imaging instrument SPHERE at the VLT to resolve remaining mysteries of the system, such as the putative small edge-on disk around T Tauri Sa, and the assignment of the complex
Externí odkaz:
http://arxiv.org/abs/1606.00024
Publikováno v:
A&A 587, A35 (2016)
We present new astrometric measurements of the components in the T Tauri system, and derive new orbits and masses. T Tauri was observed during the science verification time of the new extreme adaptive optics facility SPHERE at the VLT. We combine the
Externí odkaz:
http://arxiv.org/abs/1512.05736
Autor:
Müller, A., Pott, J. -U., Mérand, A., Abuter, R., Delplancke-Ströbele, F., Henning, Th., Köhler, R., Leinert, Ch., Morel, S., Duc, T. Phan, Pozna, E., Ramirez, A., Sahlmann, J., Schmid, C.
Publikováno v:
A&A 567, A98 (2014)
Context: A turbulent atmosphere causes atmospheric piston variations leading to rapid changes in the optical path difference of an interferometer, which causes correlated flux losses. This leads to decreased sensitivity and accuracy in the correlated
Externí odkaz:
http://arxiv.org/abs/1406.4234
Autor:
Di Folco, E., Dutrey, A., Bouquin, J. -B. Le, Lacour, S., Berger, J. -P., Köhler, R., Guilloteau, S., Piétu, V., Bary, J., Beck, T., Beust, H., Pantin, E.
We aim at unveiling the observational imprint of physical mechanisms that govern planetary formation in young, multiple systems. In particular, we investigate the impact of tidal truncation on the inner circumstellar disks. We observed the emblematic
Externí odkaz:
http://arxiv.org/abs/1404.2205