Results 61 to 70 of about 390,122 (225)

Exploring the star formation histories of galaxies [PDF]

open access: yes, 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.
core  

Objective-prism and slit-spectra redshifts in a study of the distribution of galaxies [PDF]

open access: yes, 2014
A thorough and detailed investigation into the accuracy, reliability and consistency of the objective-prism redshift technique with changes in plate material, measuring machine and reduction techniques has been undertaken.
Parker, Quentin Andrew
core   +2 more sources

SAGAbg. I. A Near-unity Mass-loading Factor in Low-mass Galaxies via Their Low-redshift Evolution in Stellar Mass, Oxygen Abundance, and Star Formation Rate

open access: yesThe Astrophysical Journal
Measuring the relation between star formation and galactic winds is observationally difficult. In this work we make an indirect measurement of the mass-loading factor (the ratio between the mass outflow rate and star formation rate) in low-mass galaxies ...
Erin Kado-Fong   +9 more
doaj   +1 more source

A Morphological Identification and Study of Radio Galaxies from LoTSS DR2 II. Strange and Odd Morphology Extragalactic Radio Sources ‘STROMERSs’

open access: yesGalaxies
STRange and Odd Morphology Extragalactic Radio Sources (STROMERSs) is a new category of radio galaxies that shows extremely peculiar anatomy. A purely manual visual search is carried out for the identification of such interesting sources.
Tapan K. Sasmal   +5 more
doaj   +1 more source

Personalization and Fortification of In‐Space Manufactured Emulsified Beverages for Long‐Term Space Travel

open access: yesComprehensive Reviews in Food Science and Food Safety, Volume 25, Issue 5, September 2026.
ABSTRACT The current trend of individualized food items (nutrient content and flavor) can be particularly valuable to support people's health and well‐being in isolated environments where access to fresh foods and diverse nutrition is difficult. At the same time, bioactive compounds and micronutrients can be employed to countermeasure any health ...
Svenja Schmidt   +4 more
wiley   +1 more source

Low luminosity elliptical galaxies [PDF]

open access: yes, 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.
core  

50% body weight loading reduces stature increases and lumbar disc expansion from 4 h hyper‐buoyancy floatation versus 15 min sitting upright

open access: yesExperimental 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   +6 more
wiley   +1 more source

Stellar population of the irregular galaxy IC 10 [PDF]

open access: yesAstronomy Letters, 2009
Based on our observations with the 6-m BTA telescope at the Special Astrophysical Observatory, the Russian Academy of Sciences, and archival Hubble Space Telescope images, we have performed stellar photometry for several regions of the irregular galaxy IC 10, a member of the Local Group.
Tikhonov, N. A., Galazutdinova, O. A.
openaire   +2 more sources

A complete redshift sample of galaxies [PDF]

open access: yes, 1983
The role of complete redshift samples is discussed with particular attention focused on the need for new deeper and better controlled surveys for statistical clustering and dynamical studies.
Bean, A.J., Bean, Adrian John
core  

The stellar structure of irregular galaxies. Face-on galaxies

open access: yesAstronomy Reports, 2005
Stellar photometry of nearby irregular galaxies of the Local Group is used to identify and study the young and old stellar populations of these galaxies. An analysis of the spatial distributions of stars of different ages in face-on galaxies shows that the young stellar populations in irregular galaxies are concentrated toward the center, and form ...
openaire   +3 more sources

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