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Spin vectors of 60 galaxies in the ``Ursa Major Filament'' are obtained from CCD images and spectroscopic determinations of the directions of rotation. These data are used to remove the four-fold degeneracy introduced by the project ed…

Astrophysics · Physics 2009-10-22 Cheongho Han

Several recent observations using large datasets of galaxies showed non-random distribution of the spin directions of spiral galaxies, even when the galaxies are too far from each other to have gravitational interaction. Here, a dataset of…

Cosmology and Nongalactic Astrophysics · Physics 2020-12-16 Lior Shamir

The nature of galaxy spin is still not fully known. Iye et al (2021) applied a 3D analysis to a dataset of bright SDSS galaxies that was used in the past for photometric analysis. They showed that the distribution of spin directions of…

Cosmology and Nongalactic Astrophysics · Physics 2022-10-12 Lior Shamir

Multiple observations made by several different telescopes have shown asymmetry between the number of spiral galaxies rotating in opposite directions in different parts of the sky. One of the immediate questions regarding the possible…

Cosmology and Nongalactic Astrophysics · Physics 2022-04-12 Lior Shamir

Previous observations have suggested non-random distribution of spin directions of galaxies at scales far larger than the size of a supercluster. Here I use $\sim1.7\cdot10^5$ spiral galaxies from SDSS and $3.3\cdot10^4$ spiral galaxies…

Astrophysics of Galaxies · Physics 2020-11-17 Lior Shamir

A spatial orientation of angular momentum vectors of galaxies in six dynamically unstable Abell clusters (S1171, S0001, A1035, A1373, A1474 and A4053) is studied. For this, two-dimensional observed parameters (e.g., positions, diameters,…

Astrophysics of Galaxies · Physics 2018-06-27 Shiv Narayan Yadav , Binil Aryal , Walter Saurer

The distribution of spin directions of $\sim6.4\cdot10^4$ SDSS spiral galaxies with spectra was examined, and compared to the distribution of $\sim3.3\cdot10^4$ Pan-STARRS galaxies. The analysis shows a statistically significant asymmetry…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-19 Lior Shamir

The paper shows an analysis of the large-scale distribution of galaxy spin directions of 739,286 galaxies imaged by DES. The distribution of the spin directions of the galaxies exhibits a large-scale dipole axis. Comparison of the location…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-02 Lior Shamir

We analyzed the distribution of spin parity in spiral galaxies using the HSC DR2 data. The spiral winding parity of disk galaxies, observed as S-spiral or Z-spiral projected onto the sky plane, provides robust information on the sign of the…

Astrophysics of Galaxies · Physics 2026-05-08 Masanori Iye , Masafumi Yagi

The asymmetry in the large-scale distribution of the directions towards spiral galaxies rotate has been observed by multiple telescopes, all show a consistent asymmetry in the distribution of galaxy spin directions as observed from Earth.…

Cosmology and Nongalactic Astrophysics · Physics 2024-10-22 Lior Shamir

We search for and find fossil evidence that the distribution of the spin axes of galaxies in cosmic web filaments relative to their host filaments are not randomly distributed. This would indicate that the action of large scale tidal…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Bernard J. T. Jones , Rien van de Weygaert , Miguel A. Aragon-Calvo

We re-examine the evidence for a violation of large-scale statistical isotropy in the distribution of projected spin vectors of spiral galaxies. We have a sample of $\sim 37,000$ spiral galaxies from the Sloan Digital Sky Survey, with their…

Galaxies are not distributed randomly in the cosmic web but are instead arranged in filaments and sheets surrounding cosmic voids. Observationally there is still no convincing evidence of a link between the properties of galaxies and their…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 E. Tempel , R. S. Stoica , E. Saar

Wojtak {\it et al} have stacked 7,800 clusters from the SDSS survey in redshift space. They find a small net blue-shift for the cluster galaxies relative to the brightest cluster galaxies, which agrees quite well with the gravitational…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Nick Kaiser

The distribution of spin direction of ~6.4*10^4 spiral galaxies with spectra was examined. The analysis shows a statistically significant cosmological-scale asymmetry between galaxies with opposite spin direction. The data also reveals that…

Astrophysics of Galaxies · Physics 2019-12-18 Lior Shamir

We find, from our study of binary spiral galaxies in the Sloan Digital Sky Survey Data Release 6, that the relative orientation of disks in binary spiral galaxies is consistent with their being drawn from a random distribution of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Jesse Buxton , Barbara S. Ryden

We present an analysis of the winding sense (S and Z-shaped) of 1\,621 field galaxies that have radial velocity between 3\,000 km s$^{-1}$ to 5\,000 km s$^{-1}$. The preferred alignments of S- and Z-shaped galaxies are studied using…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 B. Aryal

We study the alignment of galaxies relative to their local environment in SDSS-DR8 and, using these data, we discuss evolution scenarios for different types of galaxies. We defined a vector field of the direction of anisotropy of the local…

Astrophysics of Galaxies · Physics 2017-02-22 A. Hirv , J. Pelt , E. Saar , E. Tago , A. Tamm , E. Tempel , M. Einasto

We use HI observations made with the upgraded Arecibo 305M Telescope in August 1998 to obtain accurate spin vector determinations for 54 nearly edge-on galaxies in the Minnesota Automated Plate Scanner Pisces-Perseus Survey (MAPS-PP). We…

Astrophysics · Physics 2009-10-31 J. E. Cabanela , John M. Dickey

Multiple previous studies using several different probes have shown considerable evidence for the existence of cosmological-scale anisotropy and a Hubble-scale axis. One of the probes that show such evidence is the distribution of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-08-24 Lior Shamir
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