Výsledky vyhledávání - "ST/N00180X/1"

An accurate linear model for redshift space distortions in the void–galaxy correlation function

Autor: Will J. Percival, Seshadri Nadathur

Publikováno v: Nadathur, S & Percival, W J 2018, ' An accurate linear model for redshift space distortions in the void-galaxy correlation function ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/sty3372

Redshift space distortions within voids provide a unique method to test for environmental dependence of the growth rate of structures in low density regions, where effects of modified gravity theories might be important. We derive a linear theory mod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3664768a0acc04258c688397c77df61
https://doi.org/10.1093/mnras/sty3372

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Environmental dependence of X-ray and optical properties of galaxy clusters

Autor: Martin Sahlén, Robert G. Mann, Seshadri Nadathur, Maria Manolopoulou, Ben Hoyle

Publikováno v: Manolopoulou, M, Hoyle, B, Mann, R G, Sahlen, M & Nadathur, S 2021, ' Environmental dependence of X-ray and optical properties of galaxy clusters ', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 2, pp. 1953-1963 . https://doi.org/10.1093/mnras/staa3341

Galaxy clusters are widely used to constrain cosmological parameters through their properties, such as masses, luminosity and temperature distributions. One should take into account all kind of biases that could affect these analyses in order to obta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6bcc7deb71c9e0fa32537b173189c89
https://researchportal.port.ac.uk/ws/files/25155544/staa3341.pdf

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Constraints on decaying dark matter from weak lensing and cluster counts

Autor: Seshadri Nadathur, Tomo Takahashi, Kari Enqvist, Toyokazu Sekiguchi

Publikováno v: Enqvist, K, Nadathur, S, Sekiguchi, T & Takahashi, T 2020, ' Constraints on decaying dark matter from weak lensing and cluster counts ', Journal of Cosmology and Astroparticle Physics, vol. 2020, no. 04, 015 . https://doi.org/10.1088/1475-7516/2020/04/015

We revisit a cosmological constraint on dark matter decaying into dark radiation at late times. In Enqvist et al. (2015), we mainly focused on the effects of decaying dark matter (DDM) on the cosmic microwave background (CMB) and nonlinear matter pow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13a695fee206758b4a98d0d5adbe08b0
http://hdl.handle.net/10138/320503

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Testing Low-Redshift Cosmic Acceleration with Large-Scale Structure

Autor: Florian Beutler, Will J. Percival, Hans A. Winther, Seshadri Nadathur

Publikováno v: Nadathur, S, Percival, W J, Beutler, F & Winther, H 2020, ' Testing low-redshift cosmic acceleration with large-scale structure ', Physical Review Letters, vol. 124, no. 22, 221301 . https://doi.org/10.1103/PhysRevLett.124.221301

We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift $z=0.57$ combined with baryon acoustic oscillation (BAO) data at $0.110\sigma$ significance from these data alone, independent of the cosmic mic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87fbbfcf2c50476acfcadef1607757ba
http://hdl.handle.net/10852/78194

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Unbiased clustering estimates with the DESI fibre assignment

Autor: Robert N. Cahn, David J. Brooks, Angela Burden, Will J. Percival, Jaime E. Forero-Romero, Ashley J. Ross, Davide Bianchi, Michael Levi, Gregory Tarle

Publikováno v: Bianchi, D, Burden, A, Percival, W J, Brooks, D, Cahn, R N, Forero-Romero, J E, Levi, M, Ross, A J & Tarle, G 2018, ' Unbiased clustering estimates with the DESI fibre assignment ', Monthly Notices of the Royal Astronomical Society, vol. 481, no. 2, pp. 2338-2348 . https://doi.org/10.1093/MNRAS/STY2377

The Emission Line Galaxy survey made by the Dark Energy Spectroscopic Instrument (DESI) survey will be created from five passes of the instrument on the sky. On each pass, the constrained mobility of the ends of the fibres in the DESI focal plane mea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a85d0ad542d5c9ef61e92bd3702029ed
https://doi.org/10.1093/mnras/sty2377

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The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: anisotropic galaxy clustering in Fourier space

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2017, 466 (2), pp.2242-2260. ⟨10.1093/mnras/stw3298⟩
Beutler, F, Seo, H-J, Saito, S, Chuang, C-H, Cuesta, A J, Eisenstein, D J, Gil-Marín, H, Grieb, J N, Hand, N, Kitaura, F-S, Modi, C, Nichol, R C, Olmstead, M D, Percival, W J, Prada, F, Sánchez, A G, Rodriguez-Torres, S, Ross, A J, Ross, N P, Schneider, D P, Tinker, J, Tojeiro, R & Vargas-Magaña, M 2017, ' The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey : anisotropic galaxy clustering in Fourier space ', Monthly Notices of the Royal Astronomical Society, vol. 466, no. 2, pp. 2242-2260 . https://doi.org/10.1093/mnras/stw3298
Mon.Not.Roy.Astron.Soc., 2017, 466 (2), pp.2242-2260. 〈10.1093/mnras/stw3298〉
Beutler, F, Seo, H J, Saito, S, Chuang, C-H, Cuesta, A J, Eisenstein, D J, Gil-Marin, H, Grieb, J N, Hand, N, Kitaura, F-S, Sánchez, A G, Rodriguez-Torres, S, Ross, A J, Ross, N P, Schneider, D P, Tinker, J L, Tojeiro, R & Vargas-Magana, M 2017, ' The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space ', Monthly Notices of the Royal Astronomical Society, vol. 466, no. 2, pp. 2242-2260 . https://doi.org/10.1093/mnras/stw3298

We investigate the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) sample, which consists of $1\,198\,006$ galaxies in the redshift range $0.2 < z < 0.75$ and a sky coverage of $10\,252\,$deg$^2$. W

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d1e829b8c6a09f4f9d3918eda602bb7
https://doi.org/10.1093/mnras/stw3298

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Beyond BAO: improving cosmological constraints from BOSS with measurement of the void-galaxy cross-correlation

Autor: Paul Carter, Hans A. Winther, Seshadri Nadathur, Julian E. Bautista, Will J. Percival

Publikováno v: Nadathur, S, Carter, P M, Percival, W J, Winther, H A & Bautista, J 2019, ' Beyond BAO: improving cosmological constraints from BOSS with measurement of the void-galaxy cross-correlation ', Physical Review D, vol. 100, no. 2, 023504 . https://doi.org/10.1103/PhysRevD.100.023504

We present a measurement of the anisotropic void-galaxy cross-correlation function in the CMASS galaxy sample of the BOSS DR12 data release. We perform a joint fit to the data for redshift space distortions (RSD) due to galaxy peculiar velocities and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::249ab42a601833f16e9e65bb6c49d75b
http://arxiv.org/abs/1904.01030

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The extended Baryon Oscillation Spectroscopic Survey: testing a new approach to measure the evolution of the structure growth

Autor: Nikhil Padmanabhan, Fangzhou Zhu, Will J. Percival, Gong-Bo Zhao, Héctor Gil-Marín, Rossana Ruggeri, Eva-Maria Mueller

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, 484 (3), pp.4100-4112. ⟨10.1093/mnras/sty3452⟩
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2019, 484 (3), pp.4100-4112. ⟨10.1093/mnras/sty3452⟩
Ruggeri, R, Percival, W J, Mueller, E-M, Gil-Marin, H, Zhu, F, Padmanabhan, N & Zhao, G-B 2019, ' The extended Baryon Oscillation Spectroscopic Survey (eBOSS) : testing a new approach to measure the evolution of the structure growth ', Monthly Notices of the Royal Astronomical Society, vol. 484, no. 3, pp. 4100-4112 . https://doi.org/10.1093/mnras/sty3452

The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is one of the first of a new generation of galaxy redshift surveys that will cover a large range in redshift with sufficient resolution to measure the baryon acoustic oscillations (BAO) sig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96c78f21745fa3ec61ab195bd4310e79
https://hal.archives-ouvertes.fr/hal-02116662

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Low redshift Baryon Acoustic Oscillation measurement from the reconstructed 6-degree Field Galaxy Survey

Autor: Chris Blake, Ashley J. Ross, Florian Beutler, Jun Koda, Paul Carter, Will J. Percival

Publikováno v: Carter, P M, Beutler, F, Percival, W, Blake, C, Koda, J & Ross, A J 2018, ' Low redshift Baryon Acoustic Oscillation measurement from the reconstructed 6-degree Field Galaxy Survey ', Monthly Notices of the Royal Astronomical Society: Letters, vol. 481, no. 2, pp. 2371-2383 . https://doi.org/10.1093/mnras/sty2405

Low redshift measurements of Baryon Acoustic Oscillations (BAO) test the late time evolution of the Universe and are a vital probe of Dark Energy. Over the past decade both the 6-degree Field Galaxy Survey (6dFGS) and Sloan Digital Sky Survey (SDSS)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21fe787b13d26545e1fe048dda9330db
https://researchportal.port.ac.uk/portal/en/publications/low-redshift-baryon-acoustic-oscillation-measurement-from-the-reconstructed-6degree-field-galaxy-survey(71458fc6-9b94-42e9-8a21-f118b6631c6c).html

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Unbiased contaminant removal for 3D galaxy power spectrum measurements

Autor: David Bacon, Will J. Percival, Benedict Kalus, Lado Samushia

Publikováno v: Kalus, B, Percival, W J, Bacon, D & Samushia, L 2016, ' Unbiased contaminant removal for 3D galaxy power spectrum measurements ', Monthly Notices of the Royal Astronomical Society, vol. 463, no. 1, pp. 467-476 . https://doi.org/10.1093/mnras/stw2008

We assess and develop techniques to remove contaminants when calculating the 3D galaxy power spectrum. We separate the process into three separate stages: (i) removing the contaminant signal, (ii) estimating the uncontaminated cosmological power spec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::734249b36d1456273b3b5ee88373ac6d
https://doi.org/10.1093/mnras/stw2008

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