Results 51 to 60 of about 72,059 (265)
Exploring the evolution of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages and metallicities are derived in the same way as the data.
Eric F. Bell +2 more
openaire +3 more sources
Synthetic HI observations of a simulated spiral galaxy [PDF]
, 2010 Using the Torus radiative transfer code we produce synthetic observations of the 21 cm neutral hydrogen line from an SPH simulation of a spiral galaxy. The SPH representation of the galaxy is mapped onto an AMR grid, and a ray tracing method is used to ...
Acreman +50 more
core +1 more source
Magnetic fields in spiral galaxies [PDF]
The Astronomy and Astrophysics Review, 1990 Published in A&ARev (2016) 24 ...
openaire +5 more sources
ON THE FRACTION OF BARRED SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2010 We investigate the stellar masses of strongly barred spiral galaxies. Our analysis is based on a sample of ~14000 visually-classified nearby galaxies given in Nair & Abraham 2010(a). The fraction of barred spiral galaxies is found to be a strong function of stellar mass and star formation history, with a minimum near the characteristic mass at ...
Preethi Nair, Roberto Abraham
openaire +4 more sources
Star Formation and Magnetic Field Amplification due to Galactic Spirals
The Astrophysical JournalWe use global MHD galaxy simulations to investigate the effects of spiral arms on the evolution of magnetic fields and star formation within a self-regulated interstellar medium.
Hector Robinson +3 more
doaj +1 more source
Mass extinction and the structure of the milky way [PDF]
Serbian Astronomical Journal, 2013 We use the most up-to-date Milky Way model and solar orbit data in order to test the hypothesis that the Sun's galactic spiral arm crossings cause mass extinction events on Earth. To do this, we created a new model of the Milky Way's spiral arms
Filipović M.D. +4 more
doaj +1 more source
Probing isotopic ratios at z = 0.89: molecular line absorption in front of the quasar PKS 1830-211
, 2006 With the Plateau de Bure interferometer, we have measured the C, N, O and S isotopic abundance ratios in the arm of a spiral galaxy with a redshift of 0.89. The galaxy is seen face-on according to HST images. Its bulge intercepts the line of sight to the
Anders +64 more
core +3 more sources
Advanced Robotics Research, EarlyView.This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino +7 more
wiley +1 more source
A Dynamic Galaxy: Stellar Age Patterns across the Disk of M101
The Astrophysical JournalUsing deep, narrowband imaging of the nearby spiral galaxy M101, we present stellar age information across the full extent of the disk of M101. Our narrowband filters measure age-sensitive absorption features such as the Balmer lines and the slope of the
Ray Garner III +3 more
doaj +1 more source
Dust Deficiency in the Interacting Galaxy NGC 3077
Galaxies, 2017 Using 70 μ m observations taken with the PACS instrument of the Herschel space telescope, the dust content of the nearby and interacting spiral galaxy NGC 3077 has been compared with the dust content of the isolated galaxies such as NGC 2841, NGC ...
Jairo Armijos-Abendaño +4 more
doaj +1 more source