Galaxies are classified into different types according to their shape. Which of the following is a type of galaxy? A. Spiral galaxy B. Square galaxy C. Triangular galaxy D. Oval - shaped planet 相关知识点: 试题来源: 解析 A。解析:星系根据形状可分为不同类型,螺旋星系(Spiral galaxy)是其中...
The masses of 213 galaxies are statistically analysed, 175 of which are radio masses, 38 optical masses. Under certain assumptions, the angular momenta J of 183 galaxies are calculated from Vm and rm. The relation J∝ M1.66 is obtained. The galaxies are classified according to their masses as...
Hubble's Irr II galaxies are now reclassified as starburst, active, and interacting galaxies. The dwarf galaxies presently labelled as irregular correspond to Hubble's Irr I galaxies.The colors of galaxies vary according to the age of the stars responsible for most of the light. In general, ...
This Collection welcomes original research on galaxies, covering not only their formation, structure, and evolution but also the latest advances in the astronomical instrumentation which are required for their study.
Galaxies are ranked according to their luminosity within each group and classified morphologically by the S茅ersic index. We have considered samples of the host groups in superstructures of galaxies, and elsewhere. We find a significant dependence of the properties of late-type brightest group ...
With the aim of bringing substantial insight to the fundamental question of how galaxies acquire their material for star formation, we present the first comprehensive characterisation of the galaxy connectivity (i.e. the number of small-scale filamentary
We reproduce the mass-metallicity (ZM) relation of galaxies classified in two samples according to their star-forming activity, as parametrized by their sSFR, across a redshift range up to z=2. Its slope shows irrelevant evolution in the passive sample, being steeper in groups than in ...
Galaxies in the Hubble Ultra Deep Field (UDF) larger than 10 pixels (0.3 arcsec) have been classified according to morphology and their photometric propert... DM Elmegreen,BG Elmegreen,DS Rubin,... - 《Astrophysical Journal》 被引量: 177发表: 2005年 Caltech Faint Galaxy Redshift Survey. ...
Most of these galaxies are visually classified as non-regular rotators and have high velocity dispersion. The intrinsic bimodality must be stronger, as it tends to be smoothed by noise and inclination. The large sample of slow rotators allows us for the first time to unveil a secondary peak...
Transient Survey (BTS), where transients brighter than 19 mag are classified within timescales of a few days, aiming to obtain >95% spectroscopic completeness to 18.5 mag or brighter15. Besides providing the classification of the transients, the SEDM spectrum is used to measure the SN ...