Results 61 to 70 of about 43,402 (211)
Limnology and Oceanography: Methods, EarlyView.Abstract Benthic incubation chambers enclose a known volume of water overlying a known area to measure water chemistry changes and are typically used to quantify the metabolic activity of benthic organisms or communities. Here we present an economical benthic incubation chamber for shallow, low‐flow environments, built using off‐the‐shelf components ...
Luke D. Groff +2 more
wiley +1 more source
The Intrinsic Flattening of Galaxy Disks
The Astrophysical JournalHighly inclined (edge-on) disk galaxies offer the unique perspective to constrain their intrinsic flattening, c / a , where c and a are, respectively, the vertical and long radial axes of the disk measured at suitable stellar densities.
Jeremy Favaro +3 more
doaj +1 more source
On The Extended Knotted Disks of Galaxies
, 2007 The stellar disks of many spiral galaxies are twice as large as generally thought. We use archival data from the Galaxy Evolution Explorer mission (GALEX) to quantify the statistical properties of young stellar clusters in the outer, extended disks of a ...
Christlein, Daniel, Zaritsky, Dennis
core +2 more sources
The Astrophysical Journal, 1988 Evidence is presented that ripples occur not only in ellipticals but also in disk galaxies of Hubble types S0, S0/Sa, and Sa, and probably even in the Sbc galaxy NGC 3310. It is argued that the ripples cannot usually have resulted from transient spiral waves or other forced vibrations in existing disks, but instead consist of extraneous sheetlike ...
Francois Schweizer, Patrick Seitzer
openaire +1 more source
Germanium‐Based Mid‐Infrared Integrated Photonics
Laser &Photonics Reviews, EarlyView.The mid‐infrared (mid‐IR) spectral range is a part of the electromagnetic spectrum in which most of the molecules have vibrational and rotational resonances. Photonics integration in this wavelength range have thus seen a burst of interest in the recent years, mainly driven by applications related with the detection of chemical and biological ...
Delphine Marris‐Morini +6 more
wiley +1 more source
Projection effects in barred galaxies cause the wrong interpretation of radial flows
Astronomy & AstrophysicsGalaxy disks in rotation are sometimes the site of radial flows, especially in their gas component. It is important to estimate the outflows, due to active galactic nucleus or supernovae feedback, or the inflows, due to bar gravity torques.
Salibur E., Hallé A., Combes F.
doaj +1 more source
Composite Bulges. III. A Study of Nuclear Star Clusters in Nearby Spiral Galaxies
The Astrophysical Journal, 2023 We present photometric and morphological analyses of nuclear star clusters (NSCs)—very dense, massive star clusters present in the central regions of most galaxies—in a sample of 33 massive disk galaxies within 20 Mpc, part of the “Composite Bulges ...
Aishwarya Ashok +19 more
doaj +1 more source
Why are some galaxy disks extremely thin?
, 2012 Some low surface brightness galaxies are known to have extremely thin stellar disks with the vertical to planar axes ratio 0.1 or less, often referred to as superthin disks.
Banerjee, Arunima, Jog, Chanda J.
core +1 more source
NGC 4138 - A Case Study in Counterrotating Disk Formation [PDF]
, 1996 The Sa(r) galaxy NGC 4138 has been recently found to contain an extensive counterrotating disk which appears to be still forming. Up to a third of the stars in the disk system may be on retrograde orbits.
Adrick H. Broeils +7 more
core +2 more sources
The Astrophysical Journal, 1990 The abundance and strength of disk components in elliptical galaxies are investigated by studying the photometric properties of models containing a spheroidal r exp 1/4-law bulge and a weak exponential disk. Pointed isophotes are observed in a substantial fraction of elliptical galaxies. If these isophote distortions are interpreted in the framework of
Hans-Walter Rix, Simon D. M. White
openaire +1 more source