The distributive hull of a ring

The Arecibo L-band Feed Array Zone of Avoidance (ALFAZOA) Shallow Survey

“…There are fewer counterparts in regions of high extinction and for galaxies with lower Hi mass. Comparing the results of the survey to the predictions of Erdoǧdu et al (2006), and using their nomenclature, ALFAZOA confirms the position and extent in the ZOA of the C7, Cζ, Pegasus, Corona Borealis and Delphinus structures, but not of the Cygnus void. Two new structures are identified, both connected to the C7 overdensity; one extends to 35 • , and the other crosses the ZOA.…”

“…ALFAZOA confirms the continuation across the ZOA of much of the structure predicted by Erdoǧdu et al (2006), but also contradicts some of the predictions. We find that out of the 7 named large scale structures predicted to exist in this part of the ZOA (Erdoǧdu et al 2006)-three overdensities and four voids-we can confirm the extent of two of the overdensities and one void, and find an extension of the third overdensity where it was not predicted. We will go into more detail on these in section 8.1.…”

“…The decrease in the number of distant galaxies corresponds to the drop-off in sensitivity, as well as to the increased noise above v hel =7000 km s −1 for half of the survey. We can also observe, despite the galaxies being averaged over unrelated LSS in our survey region, overdensities at ∼ 3000 km/s and 4400 km/s, the first of which is a new structure and the second which appears to connect to the Pegasus overdensity, from the Erdoǧdu et al (2006) nomenclature. The LSS is discussed further in Section 8.…”

“…Here we investigate the large-scale distribution of the galaxies detected in this survey, how they relate to known large-scale structures, and examine newly identified structures. To study the relationship with known large-scale structures, we use the Hi redshifts available from the HyperLEDA (Makarov et al 2014), a public data archive, as well as the LSS naming convention and density maps of Erdoǧdu et al (2006). Figures 12 and 13 show the general sky distribution of galaxies across ALFAZOA Shallow, with the smaller dots representing sources from HyperLEDA and the larger those from our survey.…”

The ImperialIRAS-FSC Redshift Catalogue

“…There are also several extragalactic science programmes that can be carried out with the IIFSCz. The convergence of the cosmological dipole is particularly worth further investigation as previous measurements with all‐sky surveys such as IRAS or 2MASS have not yet shown a consensus on the convergence depth (Rowan‐Robinson et al 2000; Maller et al 2003; Erdoǧdu et al 2006). While 2MASS samples the local Universe (within 200 h −1 Mpc) very well, it is not quite deep enough to detect potential contributions to the dipole signal from large distance.…”