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Cosmic Shear from Galaxy Spins
Open accessAbstract
We discuss the origin of galactic angular momentum and the statistics of the present-day spin distribution. It is expected that the galaxy spin axes are correlated with the intermediate principal axis of the gravitational shear tensor. This allows one to reconstruct the shear field and thereby the full gravitational potential from the observed galaxy spin fields. We use the direction of the angular momentum vector without any information of its magnitude, which requires a measurement of the position angle and inclination on the sky of each disk galaxy. We present the maximum likelihood shear inversion procedure, which involves a constrained linear minimization. The theory is tested against numerical simulations. We find the correlation strength of nonlinear structures with the initial shear field and show that accurate large-scale density reconstructions are possible at the expected noise level.
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Cited by
Dancing in the dark: galactic properties trace spin swings along the cosmic web
Dubois, Y., Pichon, C., Welker, C., Le Borgne, D., Devriendt, J., Laigle, C., Codis, S., Pogosyan, D., Arnouts, S., Benabed, K., et al. (2014) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stu1227 · Cited by 888
Desjacques, V., Jeong, D., & Schmidt, F. (2018) · Physics Reports · doi:10.1016/j.physrep.2017.12.002 · Cited by 817
Dark Energy Survey Year 1 results: Cosmological constraints from cosmic shear
Troxel, M. A., MacCrann, N., Zuntz, J., Eifler, T. F., Krause, E., Dodelson, S., Gruen, D., Blazek, J., Friedrich, O., Samuroff, S., et al. (2018) · Physical Review D · doi:10.1103/physrevd.98.043528 · Cited by 656
Intrinsic alignment-lensing interference as a contaminant of cosmic shear
Hirata, C. M., & Seljak, U. (2004) · Physical Review D · doi:10.1103/physrevd.70.063526 · Cited by 586
Bett, P., Eke, V., Frenk, C. S., Jenkins, A., Helly, J., & Navarro, J. (2007) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2007.11432.x · Cited by 490
Metadata
- Authors
- Lee, J., & Pen, U.-L.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2000-03-20
- Volume
- 532
- Issue
- 1
- Pages
- L5-L8
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W2092357828
- Cited by
- 207
- References
- 0
- FWCI
- 6.42
- Type
- journal article
- Language
- en
- Open access
- bronze
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
