Results 81 to 90 of about 386,306 (225)

Exploring the star formation histories of galaxies [PDF]

, 1999
In this thesis, I explore the star formation histories of both spiral and elliptical galaxies. In Part 1,1 present an in-depth study of the star formation histories of spiral galaxies with a wide range of properties. Optical and near-infrared colours are
Bell, Eric Findlay, Bell, E.F.
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50% body weight loading reduces stature increases and lumbar disc expansion from 4 h hyper‐buoyancy floatation versus 15 min sitting upright

Experimental Physiology, Volume 111, Issue 9, Page 4126-4139, 1 September 2026.
Abstract Microgravity is associated with stature increases, back pain and post‐flight intervertebral disc (IVD) herniation. This study aims to determine whether 30 s seated 50% body weight (BW) axial loading is comparable to 15 min sitting upright in 1 g upon changes in stature, anterior lumbar IVD height (via ultrasound), passive vertebral stiffness ...
David Marcos‐Lorenzo, Christina Lysandrou, Laura Sudres, Alfonso Gil‐Martinez, Jaap Swanenburg, James Edward Clark, David Andrew Green   +6 more
wiley   +1 more source

The ATLAS(3D) project - XXV. Two-dimensional kinematic analysis of simulated galaxies and the cosmological origin of fast and slow rotators [PDF]

, 2014
We present a detailed two-dimensional stellar dynamical analysis of as ample of 44 cosmological hydrodynamical simulations of individual central galaxies with stellar masses of 2 x 1010Msun ∼≤ Mstar ∼≤ 6x 1011Msun.
Ven, G. v. d., Davis, T., Morganti, R., Johansson, P., McDermid, R., Davis, T. A., Blitz, L., McDermid, R. M., Oser, L., Weijmans, A., Sarzi, Marc, Duc, P. -A., Davies, R., Alatalo, Katherine, Duc, P.A., Davis, Timothy A., Khochfar, S., Bois, M., Bournaud, Frederic, Bayet, E., Serra, P., van de Ven, G., Hirschmann, M., Kuntschner, H., de Zeeuw, P. T., Cappellari, Michele, Duc, P.-A., Bournaud, F., Scott, N., Bureau, M., Davis, T., L., Naab, T., Young, L., Hirschmann, Michaela, Bayet, Estelle, Krajnovi, D., de Zeeuw, P., Davies, R. L., Alatalo, K., McDermid, Richard M., Ven, G. van de, Duc, P.- A., Crocker, A., Krajnovic, D., Emsellem, E., Duc, P., Cappellari, M., Johansson, P. H., Oosterloo, T., Young, Lisa M., Davis, T.,, Naab, Thorsten, Sarzi, M., Young, L. M., de Zeeuw, P.T., Weijmans, A.; id_orcid   +55 more
core   +1 more source

Secondary evolution of galaxies investigated by N-body simulations [PDF]

, 2008
In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
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Holmberg IX: A Unique, Infant but Inactive Galaxy as Revealed via a Multiwavelength Approach

The Astrophysical Journal Letters
In this Letter, we report a novel discovery of unique characteristics for the tidal dwarf galaxy (candidate) Holmberg IX via a multiwavelength investigation.
Ye-Wei Mao, Luis C. Ho, Alexei V. Moiseev, Oleg V. Egorov, Andrej M. Sobolev   +4 more
doaj   +1 more source

Low luminosity elliptical galaxies [PDF]

, 1998
Long-slit spectra for the photometric axes of a sample of 14 elliptical galaxies, predominantly low-luminosity ellipticals, in the Virgo cluster and in nearby groups, are studied to investigate the galaxy kinematical structure and stellar evolutionary ...
Halliday, Claire, Halliday, C.
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New morpho-kinematic classification: The two-dimensional spatial distribution of stellar specific angular momentum in late-type galaxies

Astronomy & Astrophysics
Aims. The two-dimensional spatial distribution of stellar specific angular momentum (sAM) within galaxies has never been analysed. We seek to identify the morpho-kinematics of this property and its correlation with the total stellar sAM (j★) and the ...
Pacheco-Arias Juan Manuel, Amram Philippe, Epinat Benoît, Mercier Wilfried   +3 more
doaj   +1 more source

Neutral hydrogen and star formation in irregular galaxies [PDF]

, 1987
The Very Large Array and WSTR H I synthesis observations of seven irregular galaxies are presented. The total H I images of four Local Group dwarf irregular galaxies and three larger more distant irregular galaxies are constructed at the identical ...
Skillman, Evan D.
core  

ON THE STAR FORMATION LAW FOR SPIRAL AND IRREGULAR GALAXIES [PDF]

The Astrophysical Journal, 2015
A dynamical model for star formation on a galactic scale is proposed in which the interstellar medium is constantly condensing to star-forming clouds on the dynamical time of the average midplane density, and the clouds are constantly being disrupted on the dynamical time scale appropriate for their higher density.
openaire   +2 more sources

The clustering and X-ray properties of faint galaxies [PDF]

, 1994
The clustering properties of faint (23 ≤ B ≤ 27) galaxies were investigated, with the aim of obtaining information about their redshift distribution, N(z), and therefore about the processes of galaxy evolution causing the steep rise in the galaxy number ...
Roche, Nathan, Roche, N
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