Results 91 to 100 of about 2,684,722 (398)

Globular cluster star classification: Application to M13 [PDF]

Serbian Astronomical Journal, 2013
Starting from recent determination of Fe, O, Na abundances on a restricted sample (N = 67) of halo and thick disk stars, a natural and well motivated selection criterion is defined for the classification globular cluster stars. An application is
Caimmi R.
doaj   +1 more source

Surface brightness profile of the Milky Way’s nuclear star cluster [PDF]

, 2014
Context. Although the Milky Way nuclear star cluster (MWNSC) was discovered more than four decades ago, several of its key properties have not been determined unambiguously up to now because of the strong and spatially highly variable interstellar ...
R. Schödel, A. Feldmeier, D. Kunneriath, S. Stolovy, N. Neumayer, P. Amaro-Seoane, S. Nishiyama   +6 more
semanticscholar   +1 more source

Interaction vesicles as emerging mediators of host‐pathogen molecular crosstalk and their implications for infection dynamics

FEBS Letters, EarlyView.
Interaction extracellular vesicles (iEVs) are hybrid vesicles formed through host‐pathogen communication. They facilitate immune evasion, transfer pathogens' molecules, increase host cell uptake, and enhance virulence. This Perspective article illustrates the multifunctional roles of iEVs and highlights their emerging relevance in infection dynamics ...
Bruna Sabatke, Izadora Volpato Rossi, Marcel I. Ramirez   +2 more
wiley   +1 more source

The effect of the dynamical state of clusters on gas expulsion and infant mortality [PDF]

, 2008
The star formation efficiency (SFE) of a star cluster is thought to be the critical factor in determining if the cluster can survive for a significant (>50 Myr) time.
A.-K. Jappsen, B.C. Whitmore, B.G. Elmegreen, B.G. Elmegreen, B.G. Elmegreen, C.J. Lada, C.J. Lada, C.M. Boily, C.M. Boily, F. Pinto, G. Parmentier, H. Baumgardt, H. Baumgardt, J.G. Hills, M. Gieles, M.P. Gyer, N. Bastian, N. Bastian, P. Kroupa, P. Padoan, P. Padoan, R. Chandar, R. Grijs de, R.D. Mathieu, R.S. Klessen, R.S. Klessen, S.P. Goodwin, S.P. Goodwin, S.P. Goodwin, Simon P. Goodwin, W. Verschueren, W. Verschueren, Y. Li   +32 more
core   +2 more sources

The old Nuclear Star Cluster in the Milky Way [PDF]

, 2014
We derive new constraints on the mass, rotation, orbit structure and statistical parallax of the Galactic old nuclear star cluster (NSC) and the mass of the supermassive black hole.
S. Chatzopoulos, T. Fritz, O. Gerhard, S. Gillessen, C. Wegg, R. Genzel, O. P. M. Garching, U. Virginia, U. California, Berkeley   +9 more
semanticscholar   +1 more source

Decoding the dual role of autophagy in cancer through transcriptional and epigenetic regulation

FEBS Letters, EarlyView.
Transcriptional and epigenetic regulation controls autophagy, which exerts context‐dependent effects on cancer: Autophagy suppresses tumorigenesis by maintaining cellular homeostasis or promotes tumor progression by supporting survival under stress. In this “In a Nutshell” article, we explore the intricate mechanisms of the dual function of autophagy ...
Young Suk Yu, Ik Soo Kim, Sung Hee Baek
wiley   +1 more source

Distribution of stars in clusters [PDF]

Astronomische Nachrichten, 1897
n ...
openaire   +2 more sources

The Membership and Distance of the Open Cluster Collinder 419

, 2010
The young open cluster Collinder 419 surrounds the massive O star, HD 193322, that is itself a remarkable multiple star system containing at least four components.
Berger, David H., Brummelaar, Theo A. ten, Gies, Douglas R., Grundstrom, Erika D., Mason, Brian D., McSwain, M. Virginia, Parks, J. Robert, Roberts, Jr., Lewis C., Turner, Nils H.   +8 more
core   +1 more source

The role of the central stellar cluster in active galactic nuclei. I. Semi-analytical model [PDF]

, 2002
The subject of the paper is the role of the massive stellar cluster in the activity phenomenon and in the structure of active galactic nuclei. We introduce a simple model of stellar dynamics in the internal part of the cluster, which allows us to include
Czerny, B., Vilkoviskij, E. Y.
core   +2 more sources

A stepwise emergence of evolution in the RNA world

FEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source