Zobrazeno 1 - 10
of 314
pro vyhledávání: '"Kamann, S."'
Autor:
Niederhofer, F., Bellini, A., Kozhurina-Platais, V., Libralato, M., Häberle, M., Kacharov, N., Kamann, S., Bastian, N., Cabrera-Ziri, I., Cioni, M. -R. L., Dresbach, F., Martocchia, S., Massari, D., Saracino, S.
We present proper motion (PM) measurements for a sample of 23 massive star clusters within the Large Magellanic Cloud using multi-epoch data from the Hubble Space Telescope (HST). We combined archival data from the ACS/WFC and WFC3/UVIS instruments w
Externí odkaz:
http://arxiv.org/abs/2406.17347
Autor:
Nitschai, M. S., Neumayer, N., Häberle, M., Clontz, C., Seth, A. C., Milone, A. P., Alfaro-Cuello, M., Bellini, A., Dreizler, S., Feldmeier-Krause, A., Husser, T. -O., Kacharov, N., Kamann, S., Latour, M., Libralato, M., van de Ven, G., Voggel, K., Wang, Z.
Publikováno v:
ApJ 970, 152 (2024)
$\omega$ Centauri, the most massive globular cluster in the Milky Way, has long been suspected to be the stripped nucleus of a dwarf galaxy that fell into the Galaxy a long time ago. There is considerable evidence for this scenario including a large
Externí odkaz:
http://arxiv.org/abs/2406.01688
Autor:
Taibi, S., Battaglia, G., Roth, M. M., Kamann, S., Iorio, G., Gallart, C., Leaman, R., Skillman, E. D., Kacharov, N., Beasley, M. A., Piña, P. E. Mancera, van de Ven, G.
Publikováno v:
A&A 689, A88 (2024)
The kinematics and chemical composition of stellar populations of different ages provide crucial information about the evolution of a galaxy. We aim to provide such information for IC 1613, an isolated, gas-rich, star-forming dwarf galaxy in the Loca
Externí odkaz:
http://arxiv.org/abs/2402.01631
Autor:
Saracino, S., Kamann, S., Bastian, N., Gieles, M., Shenar, T., Reindl, N., Müller-Horn, J., Usher, C., Dreizler, S., Hénault-Brunet, V.
Studies of young clusters have shown that a large fraction of O-/early B-type stars are in binary systems, where the binary fraction increases with mass. These massive stars are present in clusters of a few Myrs, but gradually disappear for older clu
Externí odkaz:
http://arxiv.org/abs/2309.03333
Autor:
Nitschai, M. S., Neumayer, N., Clontz, C., Häberle, M., Seth, A. C., Husser, T. -O., Kamann, S., Alfaro-Cuello, M., Kacharov, N., Bellini, A., Dotter, A., Dreizler, S., Feldmeier-Krause, A., Latour, M., Libralato, M., Milone, A. P., Pechetti, R., van de Ven, G., Voggel, K., Weisz, Daniel R.
Publikováno v:
ApJ 958 8 (2023)
Omega Centauri ($\omega$ Cen) is the most massive globular cluster of the Milky Way and has been the focus of many studies that reveal the complexity of its stellar populations and kinematics. However, most previous studies have used photometric and
Externí odkaz:
http://arxiv.org/abs/2309.02503
Autor:
Latour, M., Hämmerich, S., Dorsch, M., Heber, U., Husser, T. -O., Kamann, S., Dreizler, S., Brinchmann, J.
Publikováno v:
A&A 677, A86 (2023)
In this work, we characterize the properties of HB stars in the GCs $\omega$ Cen and NGC 6752. We use dedicated model atmospheres and synthetic spectra grids computed using a hybrid LTE/NLTE modeling approach to fit the MUSE spectra of HB stars hotte
Externí odkaz:
http://arxiv.org/abs/2306.14549
Autor:
Wevers, T., Selman, F. J., Reyes, A., Vega, M., Hartke, J., Bian, F., Beltramo-Martin, O., Fétick, R., Kamann, S., Kolb, J., Kravtsov, T., Moya, C., Neichel, B., Oberti, S., Reyes, C., Valenti, E.
Publikováno v:
Proc. of SPIE 2022 Vol. 12186, 121860T
The Multi Unit Spectroscopic Explorer (MUSE) is an integral field spectrograph on the Very Large Telescope Unit Telescope 4, capable of laser guide star assisted and tomographic adaptive optics using the GALACSI module. Its observing capabilities inc
Externí odkaz:
http://arxiv.org/abs/2209.07540
Autor:
Saracino, S., Kamann, S., Guarcello, M. G., Usher, C., Bastian, N., Cabrera-Ziri, I., Gieles, M., Dreizler, S., Da Costa, G. S., Husser, T. -O., Hénault-Brunet, V.
We report the detection of a black hole (NGC 1850 BH1) in the $\sim$100 Myr-old massive cluster NGC~1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequence turn-off star (4.9 $\pm$ 0.4 M${_\odot}$), which is starting to fill
Externí odkaz:
http://arxiv.org/abs/2111.06506
Many young and intermediate age massive stellar clusters host bimodal distributions in the rotation rates of their stellar populations, with a dominant peak of rapidly rotating stars and a secondary peak of slow rotators. The origin of this bimodal r
Externí odkaz:
http://arxiv.org/abs/2109.06947
$\omega$ Cen is a rare example of a globular cluster where the iron abundance of the stars spans more than one order of magnitude. Many spectroscopic investigations of its red-giant- and sub-giant- branches have revealed multiple peaks in the iron ab
Externí odkaz:
http://arxiv.org/abs/2109.01540