Results 31 to 40 of about 386,306 (225)

The Westerbork HI survey of spiral and irregular galaxies - II. R-band surface photometry of late-type dwarf galaxies

, 2002
R-band surface photometry is presented for 171 late-type dwarf and irregular galaxies. For a subsample of 46 galaxies B-band photometry is presented as well. We present surface brightness profiles as well as isophotal and photometric parameters including
Balcells, M, M. Balcells, Swaters, R A, Swaters, RA, R. A. Swaters   +4 more
core   +1 more source

Nitrogen in irregular galaxies

The Astrophysical Journal, 1990
A study of nitrogen in giant H II regions located within low-abundance irregular galaxies is presented. Both observations and theoretical models are used to examine variations in the abundance of nitrogen relative to oxygen in these galaxies. Analysis of these and previously published observations suggests that the use of low spectral resolution is the
openaire   +1 more source

HD‐DRUM Rhythmic Training in Huntington's Disease: Feasibility, Motor, and Brain Microstructural Pilot Signals

Movement Disorders Clinical Practice, EarlyView.
ABSTRACT Background Rhythmic cuing may benefit motor functions in Huntington's disease (HD) by compensating for the loss of predictive timing associated with basal ganglia degeneration. To our knowledge no remote rhythmic training application has been developed or evaluated that seeks to improve function in HD.
Pedro Luque Laguna, Vasileios Ioakeimidis, Cheney J.G. Drew, Philip Pallmann, Monica Busse‐Morris, Guy B. Watson, Robin Schubert, Anne E. Rosser, Claudia Metzler‐Baddeley   +8 more
wiley   +1 more source

Erratum: IRAS observations of irregular galaxies [PDF]

, 1987
In Infrared Astronomy Satellite (IRAS) observations of irregular galaxies, galactic blue luminosities were based on standard optical definitions. The blue luminosities (L sub B) were derived from the blue absolute magnitude (M sub B) or form the in band ...
Hunter, D. A., Gallagher, J. S.
core  

FEAST: Probing the Stellar Population of the Starburst Dwarf Galaxy NGC 4449 with JWST/NIRCam

The Astrophysical Journal
We present new JWST/NIRCam observations of the starburst irregular galaxy NGC 4449, obtained in Cycle 1 as part of the Feedback in Emerging extrAgalactic Star clusTers program, which we use to investigate its resolved stellar populations and their ...
Matteo Correnti, Giacomo Bortolini, Flavia Dell’Agli, Angela Adamo, Michele Cignoni, Elena Sacchi, Monica Tosi, Alex Pedrini, Anne S. M. Buckner, Daniela Calzetti, Ana Duarte-Cabral, Bruce G. Elmegreen, Helena Faustino Vieira, John S. Gallagher, Kathryn Grasha, Benjamin Gregg, Kelsey E. Johnson, Thomas S.-Y. Lai, Drew Lapeer, Sean T. Linden, Matteo Messa, Goran Ostlin, Elena Sabbi, Linda J. Smith, Paolo Ventura   +24 more
doaj   +1 more source

Chemical composition and kinematics of ionised gas in low-mass star-forming galaxies with extremely high [O III]/[O II] ratios★

Astronomy & Astrophysics
We present Very Large Telescope/Xshooter spectrophotometric observations of eleven low-redshift (z < 0.085) compact star-forming galaxies (the ‘high O32 sample’). These galaxies are characterised by extremely high emission-line ratios, [O III]λ5007/[O II]
Izotov Y. I., Guseva N. G., Schaerer D., Amorín R. O.   +3 more
doaj   +1 more source

A Young Star Cluster in the Leo a Galaxy

Open Astronomy, 2015
We report a serendipitous discovery of a star cluster in the dwarf irregular galaxy Leo A. Young age (~28 Myr) and low mass (~510 M⊙) estimates are based on the isochrone fit assuming a metallicity derived for HII regions (Z = 0.0007).
Stonkutė R., Narbutis D., Bridžius A., Leščinskaitė A., Vansevičius V.   +4 more
doaj   +1 more source

Scalable Computation of Topological Abstractions for Scalar Data

Computer Graphics Forum, EarlyView.
Abstract Topological data analysis has become an important tool for large scale scalar data analysis and visualization, efficiently extracting the inherent structure and features of interest of the data. However, with growing dataset sizes and complexity, it is increasingly becoming infeasible to compute topological abstractions of interest in serial ...
M. Will, J. Lukasczyk, J. Tierny, A. Gyulassy, G. H. Weber, H. Carr, C. Garth   +6 more
wiley   +1 more source

Stellar Populations and the Star Formation Histories of LSB Galaxies—Part I: Optical and Hα Imaging

Advances in Astronomy, 2011
This paper presents optical and Hα imaging for a large sample of LSB galaxies selected from the PSS-II catalogs (Schombert et al., 1992).
James Schombert, Tamela Maciel, Stacy McGaugh   +2 more
doaj   +1 more source

THE MAGNETIC FIELD OF THE IRREGULAR GALAXY NGC 4214 [PDF]

The Astrophysical Journal, 2011
We examine the magnetic field in NGC 4214, a nearby irregular galaxy, using multi-wavelength radio continuum polarization data from the Very Large Array. We find that the global radio continuum spectrum shows signs that free-free absorption and/or synchrotron losses may be important.
Kepley, Amanda, Zweibel, Ellen, Wilcots, Eric, Johnson, Kelsey, Robishaw, Timothy   +4 more
openaire   +2 more sources