Results 31 to 40 of about 233,279 (344)

The Spiral Structure in the Solar Neighborhood

Frontiers in Astronomy and Space Sciences, 2021
The spiral structure in the solar neighborhood is an important issue in astronomy. In the past few years, there has been significant progress in observation. The distances for a large number of good spiral tracers, i.e., giant molecular clouds, high-mass
L. G. Hou
doaj   +1 more source

Scalable Automated Detection of Spiral Galaxy Arm Segments

, 2014
Given an approximately centered image of a spiral galaxy, we describe an entirely automated method that finds, centers, and sizes the galaxy and then automatically extracts structural information about the spiral arms. For each arm segment found, we list
Davis, Darren R., Hayes, Wayne B.
core   +1 more source

Crawling the Cosmic Network: Exploring the Morphology of Structure in the Galaxy Distribution [PDF]

, 2010
Although coherent large-scale structures such as filaments and walls are apparent to the eye in galaxy redshift surveys, they have so far proven difficult to characterize with computer algorithms. This paper presents a procedure that uses the eigenvalues
Abazajian, Aragón-Calvo, Barrow, Berlind, Blanton, Bond, Bond, Colberg, Colless, Colombi, Davis, De Lapparent, Dietrich, Eisenstein, Forero-Romero, Frenk, Fry, Gaztanaga, Geller, Gott, Guth, Hahn, Huchra, Klypin, Kulkarni, Lee, Martínez, Massey, Michael A. Strauss, Nichol, Nicholas A. Bond, Novikov, Pan, Park, Peebles, Press, Renyue Cen, Roberts, Ross, Schaap, Shandarin, Shen, Smith, Sousbie, Sousbie, Spergel, Stein, Strauss, Tanaka, Thompson, Verde, York, Zel'dovich, Zel'dovich, Zheng   +54 more
core   +1 more source

THE STRUCTURE OF 2MASS GALAXY CLUSTERS [PDF]

The Astrophysical Journal, 2011
We use a sample of galaxies from the Two Micron All Sky Survey (2MASS) Extended Source Catalog to refine a matched filter method of finding galaxy clusters that takes into account each galaxy's position, magnitude, and redshift if available. The matched filter postulates a radial density profile, luminosity function, and line-of-sight velocity ...
Blackburne, Jeffrey A., Kochanek, Christopher S.   +1 more
openaire   +2 more sources

UGC 7388: a galaxy with two tidal loops

, 2009
We present the results of spectroscopic and morphological studies of the galaxy UGC7388 with the 8.1-m Gemini North telescope. Judging by its observed characteristics, UGC7388 is a giant late-type spiral galaxy seen almost edge-on.
B. C. Whitmore, Ch. Brocca, F. Schweizer, G. Monnet, I. F. Fernandes, J. Dubinski, J. K. Adelman-McCarthy, K. O’Neil, L. Bottinelli, M. de Oliveira-Abans, M. Faúndez-Abans, M. R. Blanton, O. K. Silchenko, R. A. Ibata, R. B. Tully, R. B. Tully, R. Ibata, V. P. Reshetnikov, V. P. Reshetnikov, V. P. Reshetnikov, V. Reshetnikov, V. Reshetnikov, V. Reshetnikov, Zh. Shang   +23 more
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Galaxy population structure from proper motions [PDF]

Symposium - International Astronomical Union, 1985
We are currently engaged in astrometry of Kapteyn Selected Area photographic plates covering the period 1908 to the present day using the GALAXY measuring engine at RGO. Our intention is to use the apparent motions to investigate the stellar velocity structure within a kiloparsec of the Sun.
N. Reid, C. A. Murray
openaire   +1 more source

Stochastic Biasing and Galaxy-Mass Density Relation in the Weakly Non-linear Regime

, 1999
It is believed that the biasing of the galaxies plays an important role for understanding the large-scale structure of the universe. In general, the biasing of galaxy formation could be stochastic.
Chodorowski M. J., Mo H. J., Mo H. J.
core   +2 more sources

MRC B0319-454: Probing the large-scale structure with a giant radio galaxy

, 2008
We present an investigation of the relationships between the radio properties of a giant radio galaxy MRC B0319-454 and the surrounding galaxy distribution with the aim of examining the influence of intergalactic gas and gravity associated with the large-
Begelman, Bliton, Blundell, Boehringer, Bregman, Bryant, Brüggen, Bîrzan, Cen, Cen, Churazov, Davé, Douglass, Fleenor, Fleenor, G. V. Bicknell, Gull, Hardcastle, Hardcastle, Haslam, Haverkorn, Huchra, Ishwara-Chandra, Jamrozy, Jamrozy, Jones, Jones, Jones, Kaiser, Kaiser, Klamer, Kraft, L. Saripalli, Lara, Ledlow, Lewis, McNamara, Mills, Mulchaey, Nulsen, R. Subrahmanyan, Safouris, Saripalli, Schatzmann, Scheuer, Simard-Normandin, Slee, Subrahmanyan, V. Safouris, Worrall, Worrall, Wright   +51 more
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Spiral Structure of Our Galaxy and of Other Galaxies [PDF]

Symposium - International Astronomical Union, 1970
Time and again Dr. B. Bok publishes his reviews on the state of optical searches of the spiral arms in our Galaxy. A great optimist at the beginning, concerning the agreement of different results, he became later more critical in his conclusions. But in his paper of 1967 he claims anew, as well established, that we can trace the spiral arms up to a ...
openaire   +1 more source

Galaxy structures — groups, clusters and superclusters [PDF]

International Journal of Geometric Methods in Modern Physics, 2014
We provide a brief summary of the history of galaxy structure studies. We also introduce several large-scale redshift surveys and summarize the most commonly used methods to identify the groups and clusters of galaxies. We present several catalogs of galaxy groups. These catalogs can be used to study the galaxy groups in different environments.
Sepp, Tiit, Gramann, Mirt
openaire   +2 more sources