Results 71 to 80 of about 2,681,556 (391)

Star clusters as building blocks for dSph galaxies formation

, 2009
We study numerically the formation of dSph galaxies. Intense star bursts, e.g. in gas-rich environments, typically produce a few to a few hundred young star clusters, within a region of just a few hundred pc.
Assmann, P., Fellhauer, M., Wilkinson, M. I.   +2 more
core   +1 more source

The relation between star formation, morphology and local density in high redshift clusters and groups [PDF]

, 2008
We investigate how the [OII] properties and the morphologies of galaxies in clusters and groups at z=0.4-0.8 depend on projected local galaxy density, and compare with the field at similar redshifts and clusters at low-z.
Alfonso Aragón‐Salamanca, Anja von der Linden, Bianca M. Poggianti, Bo Milvang‐Jensen, Bolzonella M., Claire Halliday, Dennis Zaritsky, Douglas Clowe, Gabriella De Lucia, Goto T., Gregory Rudnick, Jesus Varela, Luc Simard, Pascale Jablonka, Philip Best, Roberto Saglia, Rose Finn, Roser Pelló, Simon White, Stefan Noll, Steven Bamford, Vandana Desai   +21 more
core   +4 more sources

The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters [PDF]

, 2016
We introduce a Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) stellar census of R136a, the central ionizing star cluster of 30 Doradus.
P. Crowther, S. Caballero-Nieves, K. Bostroem, J. M. Apellániz, F. Schneider, N. Walborn, C. Angus, I. Brott, A. Bonanos, A. D. Koter, S. D. Mink, C. Evans, G. Gräfener, A. Herrero, I. Howarth, N. Langer, D. Lennon, J. Puls, H. Sana, J. Vink   +19 more
semanticscholar   +1 more source

THE VERY MASSIVE STAR CONTENT OF THE NUCLEAR STAR CLUSTERS IN NGC 5253 [PDF]

Proceedings of the International Astronomical Union, 2016
The blue compact dwarf galaxy NGC 5253 hosts a very young starburst containing twin nuclear star clusters, separated by a projected distance of 5 pc.
L. Smith, P. Crowther, D. Calzetti, F. Sidoli   +3 more
semanticscholar   +1 more source

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source

A Systematic Analysis of Star Cluster Disruption by Tidal Shocks. II. Predicting Star Cluster Dissolution Rates from a Time-series Analysis of Their Tidal Histories

The Astrophysical Journal
Most of the dynamical mass loss from star clusters is thought to be caused by the time variability of the tidal field (“tidal shocks”). Systematic studies of tidal shocks have been hampered by the fact that each tidal history is unique, implying both a ...
Jeremy J. Webb, Marta Reina-Campos, J. M. Diederik Kruijssen   +2 more
doaj   +1 more source

The GeMS/GSAOI Galactic Globular Cluster Survey (G4CS). II. Characterization of 47 Tuc with Bayesian Statistics

The Astrophysical Journal, 2023
We present a photometric analysis of globular cluster 47 Tuc (NGC 104) using near-IR imaging data from the GeMS/GSAOI Galactic Globular Cluster Survey (G4CS), which is in operation at Gemini-South telescope.
Mirko Simunovic, Thomas H. Puzia, Bryan Miller, Eleazar R. Carrasco, Aaron Dotter, Santi Cassisi, Stephanie Monty, Peter Stetson   +7 more
doaj   +1 more source

Shock-induced star cluster formation in colliding galaxies

, 2011
We studied the formation process of star clusters using high-resolution N-body/smoothed particle hydrodynamcs simulations of colliding galaxies. The total number of particles is 1.2x10^8 for our high resolution run.
Daisaka, Hiroshi, Kokubo, Eiichiro, Makino, Junichiro, Okamoto, Takashi, Saitoh, Takayuki R., Tomisaka, Kohji, Wada, Keiichi, Yoshida, Naoki   +7 more
core   +1 more source

Star Formation in Violent and Normal Evolutionary Phases [PDF]

, 2001
Mergers of massive gas-rich galaxies trigger violent starbursts that - over timescales of $> 100$ Myr and regions $> 10$ kpc - form massive and compact star clusters comparable in mass and radii to Galactic globular clusters.
BC Whitmore, BW Miller, E Vesperini, E Vesperini, E Vesperini, GR Meurer, JP Ostriker, KM Ashman, Q Zhang, SS Larsen   +9 more
core   +2 more sources

Rad27/FEN1 prevents accumulation of Okazaki fragments and ribosomal DNA copy number changes

FEBS Letters, EarlyView.
The budding yeast Rad27 is a structure‐specific endonuclease. Here, the authors reveal that Rad27 is crucial for maintaining the stability of the ribosomal RNA gene (rDNA) region. Rad27 deficiency leads to the accumulation of Okazaki fragments and changes in rDNA copy number.
Tsugumi Yamaji, Yuko Katayama, Nanase Arata, Mariko Sasaki   +3 more
wiley   +1 more source