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  Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit

Friedrich, O., Andrade-Oliveira, F., Camacho, H., Alves, O., Rosenfeld, R., Sanchez, J., et al. (2021). Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit. Monthly Notices of the Royal Astronomical Society, 508(3), 4610-4624. doi:10.1093/mnras/stab2754.

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Friedrich, O., Author
Andrade-Oliveira, F., Author
Camacho, H., Author
Alves, O., Author
Rosenfeld, R., Author
Sanchez, J., Author
Fang, X., Author
Eifler, T. F., Author
Krause, E., Author
Chang, C., Author
Omori, Y., Author
Amon, A., Author
Baxter, E., Author
Elvin-Poole, J., Author
Huterer, D., Author
Porredon, A., Author
Prat, J., Author
Terra, V., Author
Troja, A., Author
Alarcon, A., Author
Bechtol, K., AuthorBernstein, G. M., AuthorBuchs, R., AuthorCampos, A., AuthorRosell, A. Carnero, AuthorKind, M. Carrasco, AuthorCawthon, R., AuthorChoi, A., AuthorCordero, J., AuthorCrocce, M., AuthorDavis, C., AuthorDeRose, J., AuthorDiehl, H. T., AuthorDodelson, S., AuthorDoux, C., AuthorDrlica-Wagner, A., AuthorElsner, F., AuthorEverett, S., AuthorFosalba, P., AuthorGatti, M., AuthorGiannini, G., AuthorGruen, D., AuthorGruendl, R. A., AuthorHarrison, I., AuthorHartley, W. G., AuthorJain, B., AuthorJarvis, M., AuthorMacCrann, N., AuthorMcCullough, J., AuthorMuir, J., AuthorMyles, J., AuthorPandey, S., AuthorRaveri, M., AuthorRoodman, A., AuthorRodriguez-Monroy, M., AuthorRykoff, E. S., AuthorSamuroff, S., AuthorSanchez, C., AuthorSecco, L. F., AuthorSevilla-Noarbe, I., AuthorSheldon, E., AuthorTroxel, M. A., AuthorWeaverdyck, N., AuthorYanny, B., AuthorAguena, M., AuthorAvila, S., AuthorBacon, D., AuthorBertin, E., AuthorBhargava, S., AuthorBrooks, D., AuthorBurke, D. L., AuthorCarretero, J., AuthorCostanzi, M., Authorda Costa, L. N., AuthorPereira, M. E. S., AuthorVicente, J. De, AuthorDesai, S., AuthorEvrard, A. E., AuthorFerrero, I., AuthorFrieman, J., AuthorGarc´ıa-Bellido, J., AuthorGaztanaga, E., AuthorGerdes, D. W., AuthorGiannantonio, T., AuthorGschwend, J., AuthorGutierrez, G., AuthorHinton, S. R., AuthorHollowood, D. L., AuthorHonscheid, K., AuthorJames, D. J., AuthorKuehn, K., AuthorLahav, O., AuthorLima, M., AuthorMaia, M. A. G., AuthorMenanteau, F., AuthorMiquel, R., AuthorMorgan, R., AuthorPalmese, A., AuthorPaz-Chinchon, F., AuthorPlazas, A. A., AuthorSanchez, E., AuthorScarpine, V., AuthorSerrano, S., AuthorSoares-Santos, M., AuthorSmith, M., AuthorSuchyta, E., AuthorTarle, G., AuthorThomas, D., AuthorTo, C., AuthorVarga, T. N.1, Author              Weller, J.1, Author              Wilkinson, R. D., Author more..
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              


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 Abstract: The flat stellar density cores of massive elliptical galaxies form rapidly due to sinking supermassive black holes (SMBHs) in gas-poor galaxy mergers. After the SMBHs form a bound binary, gravitational slingshot interactions with nearby stars drive the core regions towards a tangentially biased stellar velocity distribution. We use collisionless galaxy merger simulations with accurate collisional orbit integration around the central SMBHs to demonstrate that the removal of stars from the centre by slingshot kicks accounts for the entire change in velocity anisotropy. The rate of strong (unbinding) kicks is constant over several hundred Myr at ∼3 Myr−1 for our most massive SMBH binary (MBH = 1.7 × 1010 M). Using a frequency-based orbit classification scheme (box, x-tube, z-tube, rosette), we demonstrate that slingshot kicks mostly affect box orbits with small pericentre distances, leading to a velocity anisotropy of β ≲ −0.6 within several hundred Myr as observed in massive ellipticals with large cores. We show how different SMBH masses affect the orbital structure of the merger remnants and present a kinematic tomography connecting orbit families to integral field kinematic features. Our direct orbit classification agrees remarkably well with a modern triaxial Schwarzschild analysis applied to simulated mock kinematic maps.


Language(s): eng - English
 Dates: 2021-10-02
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stab2754
 Degree: -



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Title: Monthly Notices of the Royal Astronomical Society
  Abbreviation : Mon. Not. Roy. Astron. Soc.
Source Genre: Journal
Publ. Info: -
Pages: - Volume / Issue: 508 (3) Sequence Number: - Start / End Page: 4610 - 4624 Identifier: ISSN: 0035-8711
ISSN: 1365-8711