scholarly journals Two‐dimensional Topology of Large‐Scale Structure in the Las Campanas Redshift Survey

1997 ◽  
Vol 489 (2) ◽  
pp. 471-475 ◽  
Author(s):  
Wesley N. Colley
Keyword(s):  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Two Dimensional ◽  
Redshift Survey

A Rich Cluster Redshift Survey for Large-Scale Structure Studies

1997 ◽  
pp. 344-345
Author(s):  
D. Batuski ◽  
K. Slinglend ◽  
J. M. Hill ◽  
S. Haase ◽  
C. Miller ◽  
...  
Keyword(s):  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Rich Cluster ◽  
Redshift Survey

scholarly journals The AAO 2DF QSO Redshift Survey

1999 ◽  
Vol 183 ◽  
pp. 178-184 ◽  
Author(s):  
B.J. Boyle ◽  
R.J. Smith ◽  
T. Shanks ◽  
S.M. Croom ◽  
L. Miller
Keyword(s):  
Large Scale ◽  
Cosmological Parameters ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Redshift Survey ◽  
The Universe

The study of large-scale structure through QSO clustering provides a potentially powerful route to determining the fundamental cosmological parameters of the Universe (see Croom & Shanks 1996). Unfortunately, previous QSO clustering studies have been limited by the relatively small sizes of homogeneous QSO catalogues that have been available. Although approximately 10,000 QSOs are now known (Veron-Cetty & Veron 1997), the largest catalogues suitable for clustering studies contain only 500–1000 QSOs (Boyle et al. 1990, Crampton et al. 1990, Hewett et al. 1994). Even combining all such suitable catalogues, the total number of QSOs which can be used for clustering studies is still only about 2000.

scholarly journals A Dynamical and Chemical Study of NGC 6302

1983 ◽  
Vol 103 ◽  
pp. 509-509
Author(s):  
I.J. Danziger ◽  
D. Baade ◽  
P. D. Atherton ◽  
K. Taylor ◽  
A. Boksenberg
Keyword(s):  
Radial Velocity ◽  
Large Scale ◽  
Flow Model ◽  
Chemical Study ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Two Dimensional ◽  
Cavity Model ◽  
Ionic Concentrations ◽  
The One

From five spectrograms obtained at five different positions in the nebula, relative ionic concentrations have been derived with respect to the nucleus. They show that the degree of excitation generally decreases with distance from the nucleus. But there are also areas with locally enhanced or attenuated excitation. Taurus data, a series of two-dimensional monochromatic images centered on (OIII) λ 5007, have been used to construct a two-dimensional velocity map. It shows a large-scale structure similar to the one of direct images with the biconical pattern being at least partly present. Areas of locally lower radial velocity which seem to be inversion symmetrically distributed with respect to the centre, are also distinguished. They do not have pronounced counterparts on direct images. The cavity model suggested by Barral et al. (1982, MNRAS 199, 95) for NGC 6302 and Icke's biconical flow model (1981, Ap. J. 247, 152) are discussed.

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