Results 81 to 90 of about 2,664,098 (397)

Does God play dice with star clusters?

The Open Journal of Astrophysics, 2023
When a detailed model of a stellar population is unavailable, it is most common to assume that stellar masses are independently and identically distributed according to some distribution: the universal initial mass function (IMF). However, stellar masses
Michael Y. Grudic, Stella S. R. Offner, Dávid Guszejnov, Claude-André Faucher-Giguère, Philip F. Hopkins   +4 more
doaj   +1 more source

The reversal of the SF-density relation in a massive, X-ray selected galaxy cluster at z=1.58: results from Herschel [PDF]

, 2014
Dusty, star-forming galaxies have a critical role in the formation and evolution of massive galaxies in the Universe. Using deep far-infrared imaging in the range 100-500um obtained with the Herschel telescope, we investigate the dust-obscured star ...
Altieri, . Bruno, Böhringer, Hans, Cresci, Giovanni, Elbaz, David, Fassbender, Rene, Nastasi, Alessandro, Rosati, Piero, Santos, Joana S., Tozzi, Paolo, Valtchanov, Ivan, Verdugo, Miguel   +10 more
core   +3 more sources

Massive star and star cluster formation [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractI review the status of massive star formation theories: accretion from collapsing, massive, turbulent cores; competitive accretion; and stellar collisions. I conclude the observational and theoretical evidence favors the first of these models.
openaire   +4 more sources

Lithopanspermia in Star-Forming Clusters [PDF]

Astrobiology, 2005
This paper considers the lithopanspermia hypothesis in star forming groups and clusters, where the chances of biological material spreading from one solar system to another is greatly enhanced (relative to the field) due to the close proximity of the systems and lower relative velocities. These effects more than compensate for the reduced time spent in
Adams, Fred C., Spergel, David N.
openaire   +6 more sources

Dendritic cells steering antigen and leukocyte traffic in lymph nodes

FEBS Letters, EarlyView.
Dendritic cells are key players in the activation of T cells and their commitment to effector function. In this In a Nutshell Review, we will discuss how dendritic cells guide the trafficking of antigen and leukocytes in the lymph node, thus influencing T‐cell activation processes. Dendritic cells (DCs) play a central role in initiating and shaping the
Enrico Dotta, Agnieszka Katarzyna Maciola, Tania Baccega, Giulia Pasqual   +3 more
wiley   +1 more source

The Transformation of Cluster Galaxies at Intermeidate Redshift

, 2004
We combine imaging data from the Advanced Camera for Surveys (ACS) with VLT/FORS optical spectroscopy to study the properties of star-forming galaxies in the z=0.837 cluster CL0152-1357.
A. R. Martel, A. Zirm, B. Holden, C. Gronwall, C. J. Burrows, Ciotti L., Conselice C. J., D. A. Golimowski, D. R. Ardila, E. S. Cheng, F. Bartko, F. Menanteau, G. D. Illingworth, G. F. Hartig, G. K. Miley, G. R. Meurer, Goto T., H. C. Ford, H. D. Tran, J. E. Krist, J. P. Blakeslee, L. D. Bradley, L. Infante, M. Clampin, M. Franx, M. J. Jee, M. P. Lesser, M. Postman, M. Sirianni, N. Benitez, N. J. G. Cross, N. L. Homeier, P. D. Feldman, P. Rosati, R. A. Brown, R. A. Kimble, R. Demarco, R. J. Bouwens, R. L. White, Rola C. S., S. Mei, T. Goto, T. J. Broadhurst, V. Motta, W. B. Sparks, W. Zheng, Z. I. Tsvetanov   +46 more
core   +1 more source

The dual nature of TDC – bridging dendritic and T cells in immunity

FEBS Letters, EarlyView.
TDC are hematopoietic cells combining dendritic and T cell features. They reach secondary lymphoid organs (SLOs) and peripheral organs (liver and lungs) after FLT3‐dependent development in the bone marrow and maturation in the thymus. TDC are activated and enriched in SLOs upon viral infection, suggesting that they might play unique immune roles, since
Maria Nelli, Mirela Kuka
wiley   +1 more source

JWST Observations of Starbursts: Massive Star Clusters in the Central Starburst of M82

The Astrophysical Journal Letters
We present a near-infrared (NIR) candidate star cluster catalog for the central kiloparsec of M82 based on new JWST NIRCam images. We identify star cluster candidates using the F250M filter, finding 1357 star cluster candidates with stellar masses >10 ^4
Rebecca C. Levy, Alberto D. Bolatto, Divakara Mayya, Bolivia Cuevas-Otahola, Elizabeth Tarantino, Martha L. Boyer, Leindert A. Boogaard, Torsten Böker, Serena A. Cronin, Daniel A. Dale, Keaton Donaghue, Kimberly L. Emig, Deanne B. Fisher, Simon C. O. Glover, Rodrigo Herrera-Camus, María J. Jiménez-Donaire, Ralf S. Klessen, Laura Lenkić, Adam K. Leroy, Ilse De Looze, David S. Meier, Elisabeth A. C. Mills, Juergen Ott, Mónica Relaño, Sylvain Veilleux, Vicente Villanueva, Fabian Walter, Paul P. van der Werf   +27 more
doaj   +1 more source

Calibration of radii and masses of open clusters with a simulation

, 2010
Context: A recent new approach to apply a simple dynamical mass estimate of tidally limited star clusters is based on the identification of the tidal radius in a King profile with the dynamical Jacobi radius.
A. Ernst, A. Just, Aarseth, Casertano, Dauphole, Harfst, Just, Kharchenko, King, King, M. I. Petrov, Makino, Miller, Miyamoto, P. Berczik, Piskunov, Piskunov, Piskunov, Roeser, Spurzem, Wielen   +20 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