Results 91 to 100 of about 72,560 (265)
On the Spiral Structure of the Milky Way Galaxy
, 2010 We consider the possible pattern of the overall spiral structure of the Galaxy, using data on the distribution of neutral (atomic), molecular, and ionized hydrogen, on the base of the hypothesis of the spiral structure being symmetric, i.e.
A. Cabrera-Lavers +48 more
core +1 more source
The simulation of molecular clouds formation in the Milky Way [PDF]
, 2012 Using 3D hydrodynamic calculations we simulate formation of molecular clouds in the Galaxy. The simulations take into account molecular hydrogen chemical kinetics, cooling and heating processes.
A. M. Sobolev +88 more
core +1 more source
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
The present-day galaxy population in spiral galaxies [PDF]
AIP Conference Proceedings, 2009 Although there are many more stellar population studies of elliptical and lenticular galaxies, studies of spiral galaxies are catching up, due to higher signal to noise data on one hand, and better analysis methods on the other. Here I start by discussing some modern methods of analyzing integrated spectra of spiral galaxies, and comparing them with ...
Reynier Peletier +7 more
openaire +4 more sources
Quantifying the Unwinding Due to Ram Pressure Stripping in Simulated Galaxies
GalaxiesGalaxies moving through the gas of the intracluster medium (ICM) experience ram pressure stripping, which can leave behind a gas tail. When a disk galaxy receives the wind edge-on, however, the characteristic signature is not a typical jellyfish tail ...
Rubens E. G. Machado +2 more
doaj +1 more source
Disk Galaxy Models Driven by Stochastic Self-Propagating Star Formation
Open Astronomy, 2010 We present a model of chemical and spectrophotometric evolution of disk galaxies based on a stochastic self-propagating star formation scenario. The model incorporates galaxy formation through the process of accretion, chemical and photometric evolution ...
Mineikis T., Vansevičius V.
doaj +1 more source
The Stability of Some Galaxy Disks is Still Perplexing
The Astrophysical Journal, 2023 The problem of how some disk galaxies avoid forming bars remains unsolved. Many galaxy models having reasonable properties continue to manifest vigorous instabilities that rapidly form strong bars and no widely accepted idea has yet been advanced to ...
J. A. Sellwood, R. G. Carlberg
doaj +1 more source
Mass and dust in the disk of a spiral lens galaxy
, 2003 Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope and Magellan observations of the two-image quasar PMN J2004-1349, revealing
Jackson N. +9 more
core +1 more source
Proton‐linked effects on the axial coordination in ferric and ferrous horse heart cytochrome c
Protein Science, Volume 34, Issue 11, November 2025.Abstract The effect of pH (between pH 7.0 and 0.0) on the spectroscopic properties of ferric and ferrous derivatives of horse heart cytochrome c (hhcytc‐Fe(III) and hhcytc‐Fe(II), respectively) in 1.0M phosphate buffer is reported. This study further deepens the investigation of spectroscopic properties of a heme‐protein to very low pH (i.e., pH ≈ 0 ...
Federico Sebastiani +8 more
wiley +1 more source
Stellar Populations in Spiral Galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 Abstract We report preliminary results of the characterization of bulge and inner disk stellar populations for 8 nearby spiral galaxies using Gemini/GMOS. The long-slit spectra extend out to 1–2 disk scale lengths with S/N/Å>50. Two different model fitting techniques, absorption-line indices and full spectral synthesis, are found to weigh age ...
J. Jesús González +2 more
openaire +3 more sources