Surface Brightness
Another look at the size of the low surface brightness galaxy VCC 1661 in the Virgo Cluster
... We obtained new wide-field imaging that allowed us to re-measure this galaxy’s extent. Thereby, we could con- firm that the characteristic radius (here parameterized by a S´ersic profile) is fully consistent with typical ...
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Steepening of the 820 μm continuum surface brightness profile signals dust evolution in TW Hya's disk
... et al. (2015) to explain the dark rings in the HL Tau millimeter- continuum image as locations of growth to decimeter-sized par- ticles at the location of frost lines. Similarly in TW Hya, the location of the turn-over ...
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The dependence of H ii region properties on global and local surface brightness within galaxy discs
... the remaining galaxies, two broader Hα filters provided at KPNO were used which are similar to those available at CTIO which were employed for 21 of the 69 galaxies observed there. Because the same or similar Hα filters ...
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The stability of low surface brightness disks based on multi wavelength modeling
... Initial values for the fitting process were taken from sources in the literature. Matthews & Wood (2001) have previously in- vestigated UGC 7321 using a three-dimensional Monte Carlo scattered light code and their ...
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A population of faint low surface brightness galaxies in the Perseus cluster core
... Based on a more detailed visual examination of their morphology, we classified 82 of our candidates as likely galaxies. They are characterized by a smooth morphology and are confirmed in the independent dataset. We ...
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Surface brightness distributions of late type stars
... Previous work by Jeffers et al. (2004b) (Chapter 5) has shown that the eclipsed surface of SV Cam is peppered with 28% spots that are too small to be resolved using eclipse mapping. The presence of many spots will ...
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The Herschel-ATLAS: magnifications and physical sizes of 500-μ m-selected strongly lensed galaxies
... source brightness distribution with an adaptive pixel scale scheme, extended to work in the Fourier visibility space of ...source surface brightness with an elliptical Gaussian ...
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A study of diffuse southern Ha nebulae
... The progression in structural forms from centrally condensed objects to ring-like regions suggests a classification based simply upon the radial variation of surface brightness in the ne[r] ...
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Photographic surface photometry of galaxies in the Virgo cluster
... Fig.2Y-— Radial luminosity distributions for N GC 4459 and M 83. I is the surface brightness. O rdi nates are log I and / in B-mag per square second of arc. R is distance from the nucleus along the major ...
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Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets
... disk surface. The rapid drop in surface brightness seen in the H-band PI data to the east of the spiral arms (Figure 3) further indicates that the arm is optically thick and extends sufficiently far ...
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Observations of non-solar-type dynamo processes in stars with shallow convective zones
... reconstructed surface brightness images that are dominated by polar and high-latitude starspots and a magnetic field topology that shows large-scale radial and azimuthal magnetic field ...
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An Alternative Model of Rotation Curve that Explains Anomalous Orbital Velocity, Mass Discrepancy and Structure of Some Galaxies
... observed surface brightness of galaxies and the newly developed cyclostrophic velocity ...the surface brightness, also yield a very good fit of the observed and computed galaxy rotation ...
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Surface Photometry of Spiral Galaxy NGC 5005 and Elliptical Galaxy NGC 4278 Zahraa Adnan| Abdullah K. Ahmed
... using surface photometric techniques with ...maps, surface brightness profiles and a bulge/disk decomposition of the galaxy images were performed, although the disk position angle, ellipticity and ...
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Fading AGN candidates: AGN histories and outflow signatures
... the observed emission, making the broad assumption as noted above that the densest gas clumps are similar at various projected distances from the AGN within each system. In practice, we use the required photon rate ...
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Triaxial orbit-based modelling of the Milky Way Nuclear Star Cluster
... the surface brightness distribution. The Multi-Gaussian-Expansion (MGE) model (Emsellem, Monnet & Bacon 1994) has the advan- tage that it can be deprojected analytically. We measured the pho- tometry of ...
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Subarcsecond international LOFAR radio images of Arp 220 at 150 MHz. A kpc-scale star forming disk surrounding nuclei with shocked outflows
... At the GHz position of the eastern nucleus, the low 150 MHz surface brightness and the positive spectral index indicates sig- nificant absorption of the emission from the nuclear disk.. [r] ...
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Radial distribution of dust, stars, gas, and star formation rate in DustPedia face on galaxies
... A possible mechanism that could explain our findings is a change in the typical lifetimes of grains against destruction by shocks, with a longer lifetime at larger radii (Sauvage et al. 2005). Be- cause of the similarity ...
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Simulation of Multi-Layer Rough Surfaces Media in the Passive Millimeter-Wave Imaging
... rough surface are studied and ...radiation brightness temperature, and correlation length is inversely proportional to radiation brightness ...to brightness temperature in the same ...the ...
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Land Surface Temperature Retrival of Landsat-8 Data Using Split Window Algorithm- A Case Study of Ranchi District
... Land surface temperature (LST) is an important factor in global climate change, vegetation growth, and ...Land surface temperature estimation using SPLIT-WINDOW algorithm on Landsat 8 OLI (Operational Land ...
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Effect of temperature and magnetic fields on the structural state of the Fe-Zr-B amorphous alloy below crystallization temperature
... the brightness spectra of the reflection from the surface of the object under study and the distribution of the zones, in which these changes are ...reflection brightness spectrum in arbitrary units ...
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