THE ARROWHEAD MINI-SUPERCLUSTER OF GALAXIES
ABSTRACT Superclusters of galaxies can be defined kinematically from local evaluations of the velocity shear tensor. The location where the smallest eigenvalue of the shear is positive and maximal defines the center of a basin of attraction. Velocity and density fields are reconstructed with Wiener...
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| creator | Pomarède, Daniel Tully, R. Brent Hoffman, Yehuda Courtois, Hélène M. |
| description | ABSTRACT Superclusters of galaxies can be defined kinematically from local evaluations of the velocity shear tensor. The location where the smallest eigenvalue of the shear is positive and maximal defines the center of a basin of attraction. Velocity and density fields are reconstructed with Wiener Filter techniques. Local velocities due to the density field in a restricted region can be separated from external tidal flows, permitting the identification of boundaries separating inward flows toward a basin of attraction and outward flows. This methodology was used to define the Laniakea Supercluster that includes the Milky Way. Large adjacent structures include Perseus-Pisces, Coma, Hercules, and Shapley but current kinematic data are insufficient to capture their full domains. However, there is a small region trapped between Laniakea, Perseus-Pisces, and Coma that is close enough to be reliably characterized and that satisfies the kinematic definition of a supercluster. Because of its shape, it is given the name the Arrowhead Supercluster. This entity does not contain any major clusters. A characteristic dimension is ∼25 Mpc and the contained mass is only |
| doi_str_mv | 10.1088/0004-637X/812/1/17 |
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Brent</creatorcontrib><creatorcontrib>Hoffman, Yehuda</creatorcontrib><creatorcontrib>Courtois, Hélène M.</creatorcontrib><title>THE ARROWHEAD MINI-SUPERCLUSTER OF GALAXIES</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>ABSTRACT Superclusters of galaxies can be defined kinematically from local evaluations of the velocity shear tensor. The location where the smallest eigenvalue of the shear is positive and maximal defines the center of a basin of attraction. Velocity and density fields are reconstructed with Wiener Filter techniques. Local velocities due to the density field in a restricted region can be separated from external tidal flows, permitting the identification of boundaries separating inward flows toward a basin of attraction and outward flows. This methodology was used to define the Laniakea Supercluster that includes the Milky Way. Large adjacent structures include Perseus-Pisces, Coma, Hercules, and Shapley but current kinematic data are insufficient to capture their full domains. However, there is a small region trapped between Laniakea, Perseus-Pisces, and Coma that is close enough to be reliably characterized and that satisfies the kinematic definition of a supercluster. Because of its shape, it is given the name the Arrowhead Supercluster. This entity does not contain any major clusters. A characteristic dimension is ∼25 Mpc and the contained mass is only</description><subject>Astrophysics</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Attraction</subject><subject>Basins</subject><subject>Boundaries</subject><subject>CAPTURE</subject><subject>Coma</subject><subject>Cosmology and Extra-Galactic Astrophysics</subject><subject>DENSITY</subject><subject>DISTANCE</subject><subject>Galaxies</subject><subject>galaxies: distances and redshifts</subject><subject>GALAXY CLUSTERS</subject><subject>Kinematics</subject><subject>large-scale structure of universe</subject><subject>MASS</subject><subject>MILKY WAY</subject><subject>RED SHIFT</subject><subject>Sciences of the Universe</subject><subject>SHEAR</subject><subject>UNIVERSE</subject><issn>0004-637X</issn><issn>1538-4357</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqN0VtLwzAYBuAgCs7DH_BqoBfC6JZD0ySXZXZ2UJ3sgN59xCxjHVtbm07w35tR2ZWIEAiB5_0I74fQDcF9gqUcYIzDIGLibSAJHZABESeoQziTQci4OEWdIzhHF85tDk-qVAf15mnSjafTyWuaxA_dp_HzOJgtXpLpMFvM5sm0Oxl1H-Msfhsnsyt0ttJbZ69_7ku0GCXzYRpkk8fxMM4CE4a8CYymhlClV0otGaNWWSE5WTKsBaXqnTL1zomMOLNChHJpFDeYKmkEtlLq0LBLdNvOLV2TgzN5Y83alEVhTQOUysgf6VWvVWu9harOd7r-glLnkMYZ5AWtGGBCMSdKfhKv71td1eXH3roGdrkzdrvVhS33DohQjHKKmfwHjSQXIeeRp7Slpi6dq-3q-BGC4bAYOBQNh97BLwaID_vQXRvKywo25b4ufJmgq82RQLVcedb_hf0x9xsYB5KH</recordid><startdate>20151010</startdate><enddate>20151010</enddate><creator>Pomarède, Daniel</creator><creator>Tully, R. Brent</creator><creator>Hoffman, Yehuda</creator><creator>Courtois, Hélène M.</creator><general>The American Astronomical Society</general><general>American Astronomical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-9291-1981</orcidid></search><sort><creationdate>20151010</creationdate><title>THE ARROWHEAD MINI-SUPERCLUSTER OF GALAXIES</title><author>Pomarède, Daniel ; Tully, R. Brent ; Hoffman, Yehuda ; Courtois, Hélène M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-ca2c129af99d332e9e7851d30a7229b239b518653e7748dc95c0298c70e88a4c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Astrophysics</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Attraction</topic><topic>Basins</topic><topic>Boundaries</topic><topic>CAPTURE</topic><topic>Coma</topic><topic>Cosmology and Extra-Galactic Astrophysics</topic><topic>DENSITY</topic><topic>DISTANCE</topic><topic>Galaxies</topic><topic>galaxies: distances and redshifts</topic><topic>GALAXY CLUSTERS</topic><topic>Kinematics</topic><topic>large-scale structure of universe</topic><topic>MASS</topic><topic>MILKY WAY</topic><topic>RED SHIFT</topic><topic>Sciences of the Universe</topic><topic>SHEAR</topic><topic>UNIVERSE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pomarède, Daniel</creatorcontrib><creatorcontrib>Tully, R. Brent</creatorcontrib><creatorcontrib>Hoffman, Yehuda</creatorcontrib><creatorcontrib>Courtois, Hélène M.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Pomarède, Daniel</au><au>Tully, R. Brent</au><au>Hoffman, Yehuda</au><au>Courtois, Hélène M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>THE ARROWHEAD MINI-SUPERCLUSTER OF GALAXIES</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2015-10-10</date><risdate>2015</risdate><volume>812</volume><issue>1</issue><spage>1</spage><epage>10</epage><pages>1-10</pages><issn>0004-637X</issn><issn>1538-4357</issn><eissn>1538-4357</eissn><abstract>ABSTRACT Superclusters of galaxies can be defined kinematically from local evaluations of the velocity shear tensor. The location where the smallest eigenvalue of the shear is positive and maximal defines the center of a basin of attraction. Velocity and density fields are reconstructed with Wiener Filter techniques. 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| subjects | Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Attraction Basins Boundaries CAPTURE Coma Cosmology and Extra-Galactic Astrophysics DENSITY DISTANCE Galaxies galaxies: distances and redshifts GALAXY CLUSTERS Kinematics large-scale structure of universe MASS MILKY WAY RED SHIFT Sciences of the Universe SHEAR UNIVERSE |
| title | THE ARROWHEAD MINI-SUPERCLUSTER OF GALAXIES |
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