MG13 - Talk detail |
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Participant |
Tempel, Elmo | |||||||
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Institution |
Tartu Observatory - Observatooriumi - Toravere - Tartumaa - Estonia | |||||||
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Session |
OC4 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Orientation of galaxies in filaments: 3D photometrical modelling of galaxies and filamentary structure in the SDSS | |||||
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Abstract |
We search for and find evidence that the spin axes of galaxies relative to their host filaments are not randomly distributed. Similarly to dark matter haloes in N-body simulations, spin axes of spiral galaxies are weakly aligned parallel to filaments, whereas elliptical galaxies have orthogonal alignment. To find the spin axes of galaxies, we used the 3D photometrical model of galaxies. This model allows to estimate relatively accurately the inclination angle of galaxies, whereas in 2D models the inclination angle is degenerate with the disc thickness. To search for filaments in the cosmic web, we use a three-dimensional object point process, which help to find the filaments and also defines the orientation of a filament. |
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