Zobrazeno 1 - 10
of 255
pro vyhledávání: '"Pfalzner, S."'
The Forschungszentrum Juelich has been hosting the German part of the LOFAR archive since 2013. It is Germany's most extensive radio astronomy archive, currently storing nearly 22 petabytes (PB) of data. Future radio telescopes are expected to requir
Externí odkaz:
http://arxiv.org/abs/2406.03547
Autor:
Pfalzner, S.
Observations show that individual protoplanetary disk lifetimes vary from \mbox{$<$ 1 Myr} to $\gg$ 20 Myr. The disk lifetime distribution is currently unknown. For the example of a Gaussian distribution of the disk lifetime, I suggest a simple metho
Externí odkaz:
http://arxiv.org/abs/2210.11764
Autor:
Pfalzner, S., Kirk, H., Sills, A., Urquhart, J. S., Kauffmann, J., Kuhn, M. A., Bhandare, A., Menten, K. M.
Stars form predominantly in groups usually denoted as clusters or associations. The observed stellar groups display a broad spectrum of masses, sizes and other properties, so it is often assumed that there is no underlying structure in this diversity
Externí odkaz:
http://arxiv.org/abs/1512.00334
Autor:
Pfalzner, S., Davies, M. B., Gounelle, M., Johansen, A., Muenker, C., Lacerda, P., Zwart, S. Portegies, Testi, L., Trieloff, M., Veras, D.
The solar system started to form about 4.56 Gyr ago and despite the long intervening time span, there still exist several clues about its formation. The three major sources for this information are meteorites, the present solar system structure and t
Externí odkaz:
http://arxiv.org/abs/1501.03101
Stars mostly form in groups consisting of a few dozen to several ten thousand members. For 30 years, theoretical models provide a basic concept of how such star clusters form and develop: they originate from the gas and dust of collapsing molecular c
Externí odkaz:
http://arxiv.org/abs/1408.6021
Autor:
Urquhart, J. S., Moore, T. J. T., Csengeri, T., Wyrowski, F., Schuller, F., Hoare, M. G., Lumsden, S. L., Mottram, J. C., Thompson, M. A., Menten, K. M., Walmsley, C. M., Bronfman, L., Pfalzner, S., König, C., Wienen, M.
By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the RMS survey to massive clumps found in the submillimetre ATLASGAL survey, we have identified ~1000 embedded young massive stars between 280\degr < $\el
Externí odkaz:
http://arxiv.org/abs/1406.5078
The realization that most stars form in clusters, raises the question of whether star/planet formation are influenced by the cluster environment. The stellar density in the most prevalent clusters is the key factor here. Whether dominant modes of clu
Externí odkaz:
http://arxiv.org/abs/1208.0479
Most stars form in a cluster environment. These stars are initially surrounded by discs from which potentially planetary systems form. Of all cluster environments starburst clusters are probably the most hostile for planetary systems in our Galaxy. T
Externí odkaz:
http://arxiv.org/abs/1207.2256
Investigations of stellar encounters in cluster environments have demonstrated their potential influence on the mass and angular momentum of protoplanetary discs around young stars. In this study it is investigated in how far the initial surface dens
Externí odkaz:
http://arxiv.org/abs/1111.2466
Autor:
Pfalzner, S.
Massive Galactic clusters (> 1000 Msun) exhibit a clear correlation between cluster density, size and age and can be sorted in two categories, i.e. starburst and leaky clusters. The reason for the existance of two types of massive clusters is an open
Externí odkaz:
http://arxiv.org/abs/1110.2638