Star and galaxy distribution
Testing homogeneity with galaxy star formation histories
... the galaxy distribution: we cannot directly observe homogeneity, since we observe down our past light cone, recording properties on two spheres of constant redshift and not on spatial surfaces that ...
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The spatial distribution of the young stellar clusters in the star-forming galaxy NGC 628.
... uniform distribution within the crossing time of the galaxy (∼175 and 80 Myr for the LMC and SMC, respectively; Gieles et ...a galaxy (Meurer et ...of star clusters with time will thus depend ...
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MODELING THE GRB HOST GALAXY MASS DISTRIBUTION: ARE GRBs UNBIASED TRACERS OF STAR FORMATION?
... model distribution by drawing a random set of values from the WSFR distribution, equal in size to the observed samples, to which we can perform a two-sided Kolmogorov–Smirnov (K-S) ...mass ...
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Minor Galaxy Interactions: Star Formation Rates and Galaxy Properties
... between star formation and pair ...projected galaxy pair separation ...between star formation indicators and projected separation in the SDSS (Nikolic et ...The galaxy pairs identified in ...
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Mathematical Morphology: Star/Galaxy Differentiation & Galaxy Morphology Classification
... In particular, accurately and uniformly classify- ing objects in astronomical images is of great impor- tance. One way for this to be achieved is by per- forming the classification by eye, however there are issues with ...
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Motion Law of Graviton in Three Dimensional Space and Its Influence on Star Distribution of Spiral Galaxy
... spiral galaxy, we set up a motion trace equation of graviton in the three-dimensional space, concluding method for measuring the velocity of ...and galaxy center, according with actual crossrange ...
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Machine learning approaches to star-galaxy classification
... four star-galaxy classification techniques and four combination methods, and measure the performance of each technique on the same test data set from Section ...the distribution of sources in the ...
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Effect of galaxy mergers on star formation rates
... The CANDELS network achieves an accuracy of 0.826 at validation with a cut threshold of 0.5. If we decrease the thresh- old to 0.47, the accuracy increases to 0.840. Using the same threshold of 0.47 at testing, the final ...
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Galaxy and Mass Assembly (GAMA) : Impact of the Group Environment on Galaxy Star Formation
... of star formation from the last ∼ 10 ...sSFR distribution of group galaxies can be different with respect to that of field galaxies because there can be an overall shift in the total distribution of ...
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Tipping Scales in Galaxy Surveys: Star/Galaxy Separation and Scale-Dependent Bias
... which star/galaxy separation is a potentially critical systematic is the precision measurement of Primordial Non-Gaussianities ...stellar distribution in the Milky Way is across large angular scales, ...
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Galaxy And Mass Assembly (GAMA) : galaxy environments and star formation rate variations.
... on galaxy SFRs for the star-forming ...the distribution of SFRs for star-forming galaxies shows no change with density, and no evidence for a physical suppression in dense ...on ...
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Galaxy and Mass Assembly (GAMA) : impact of the group environment on galaxy star formation.
... parent distribution by measuring the maximum difference between the two cumulative distribution ...cumulative distribution functions occurring if the two samples are drawn from the same parent ...
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Star Clusters in the Nearby Late-Type Galaxy NGC
... SBm galaxy NGC 1311, obtained with the Hubble Space Telescope, reveal a small population of 13 candidate star ...candidate star clusters based on a combination of their luminosity, extent and ...
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Galaxy Formation: One Star at a Time. New Information from the Kinematics of Field Stars in the Galaxy
... & Chiba, these larger clumps move gradually toward the central region of the system, due to both dynamical friction and dissipative merging with smaller clumps. Finally, the last merging event occurs between the two ...
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Galaxy Structure as a Driver of the Star Formation Sequence Slope and Scatter
... connect galaxy structure and star formation to understand the observed bimodal distribution of galaxies across cosmic ...the star formation sequence directly re fl ects the bimodality of the ...
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Galaxy Zoo: star formation versus spiral arm number
... If we consider the IRX– β diagram, we see that (unbarred) galax- ies with all numbers of arms have similar β distributions, indicating that the amount of extinction affecting the observed UV light does not vary ...
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Galaxy pairs in cosmological simulations: Effects of interactions on star formation
... their star formation activity within two optical ...simulated galaxy sample is made up of 364 systems. For each simulated galaxy, we esti mated the stellar birthrate parameter, b = SFR/{SFR), ...
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Star formation and stellar mass assembly in galaxy formation models
... the distribution at each lookback ...of star formation relative to gas accretion between haloes of different mass at z = 0, stellar mass assembly broadly tracks the halo assembly ...
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Fourteen candidate RR Lyrae star streams in the inner Galaxy
... Sky Distribution Figure 1 shows the GC3 +nGC3 PCMs in the distance bins where significant (>4σ) peak detections were ...the distribution of RRLS in the current R gal bin, in galactocentric spherical ...
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Galaxy pairs in the SDSS - XIII. The connection between enhanced star formation and molecular gas properties in galaxy mergers
... the distribution of stellar ...a galaxy encounter the distribution of molecular gas is less uniform, with CO emission located along tidal features, dust lanes or in extended discs (Shlosman, Frank ...
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