Results 91 to 100 of about 171,691 (281)

Galactic Stellar Populations

, 2005
19 pages, invited review at the Cozumel/Cancun conference on Resolved Stellar Populations, April 2005. ASP Conference proceedings, eds D.
Wyse, Rosemary F. G., Gilmore, Gerard
openaire   +2 more sources

Stellar populations in normal galaxies [PDF]

Proceedings of the International Astronomical Union, 2004
6 pages, 4 figures, in Proceedings of the IAU Symposium No. 222 "The Interplay Among Black Holes, Stars, and ISM in Galactic Nuclei", eds. T. Storchi-Bergmann, L.C. Ho, and H.R.
openaire   +2 more sources

Structure of the SMC - Stellar component distribution from 2MASS data

, 2008
The spatial distribution of the SMC stellar component is investigated from 2MASS data. The morphology of the different age populations is presented. The center of the distribution is calculated and compared with previous estimations.
A. Karampelas, Begum, Cioni, Cote, E. Kontizas, E. Livanou, Freeman, Gardiner, Haynes, I. Gonidakis, M. Belcheva, M. Kontizas, Maragoudaki, Morgan, P. Tsalmantza, Stanimirovic, Strigari, U. Klein   +17 more
core   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

A MaNGA about the Legacy. I. Connecting the Assembly of Stellar Halo with the Average Star Formation History in Low-redshift Massive Galaxies

The Astronomical Journal
We investigate the connection between stellar mass distribution, assembly history, and star formation timescales in low-redshift massive early-type galaxies (ETGs) by combining deep LegacySurvey imaging with MaNGA’s spatially resolved spectroscopy ...
Xiaoya Zhang, Song Huang, Meng Gu
doaj   +1 more source

Biases and Uncertainties in Physical Parameter Estimates of Lyman Break Galaxies from Broad-band Photometry

, 2008
We investigate the biases and uncertainties in estimates of physical parameters of high-redshift Lyman break galaxies (LBGs), such as stellar mass, mean stellar population age, and star formation rate (SFR), obtained from broad-band photometry.
Adelberger, Ando, Calzetti, Conroy, Drory, Finkelstein, Giavalisco, Giavalisco, Henry C. Ferguson, Hopkins, Idzi, Idzi, Koekemoer, Labbé, Lai, Lee, Lowenthal, Madau, Mauro Giavalisco, Nagamine, Papovich, Papovich, Papovich, Pettini, Rachel S. Somerville, Rafal Idzi, Ravindranath, Rhoads, Sawicki, Sawicki, Scoville, Seong-Kook Lee, Shapley, Shapley, Shapley, Shim, Stark, Steidel, Steidel, Steidel, Steidel, Tommy Wiklind, Vanzella, Wuyts, Yan   +44 more
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

A Census of Star Formation Histories of Massive Galaxies at 0.6 < z < 1 from Spectrophotometric Modeling Using Bagpipes and Prospector

The Astrophysical Journal
We present individual star formation histories (SFHs) of ∼3000 massive galaxies (log( M _* / M _⊙ ) > 10.5) from the Large Early Galaxy Astrophysics Census spectroscopic survey at a lookback time of ∼7 billion yr and quantify the population trends ...
Yasha Kaushal, Angelos Nersesian, Rachel Bezanson, Arjen van der Wel, Joel Leja, Adam Carnall, Anna Gallazzi, Stefano Zibetti, Gourav Khullar, Marijn Franx, Adam Muzzin, Anna de Graaff, Camilla Pacifici, Katherine E. Whitaker, Eric F. Bell, Marco Martorano   +15 more
doaj   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Stellar Ages: A Code to Infer Properties of Stellar Populations

The Astrophysical Journal
We present a novel statistical algorithm, Stellar Ages, which currently infers the age, metallicity, and extinction posterior distributions of stellar populations from their magnitudes.
Joseph J. Guzman, Jeremiah W. Murphy, Andrés F. Barrientos, Benjamin F. Williams, Julianne J. Dalcanton   +4 more
doaj   +1 more source