Baryonic feedback measurement from KV450 cosmic shear analysis

Mijin Yoon; M. James Jee

doi:10.3847/1538-4357/abcd9e

Baryonic feedback measurement from KV450 cosmic shear analysis

Mijin Yoon, M. James Jee

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

While baryonic feedback is one of the most important astrophysical systematics that we need to address in order to achieve precision cosmology, few weak lensing studies have directly measured its impact on the matter power spectrum. We report measurement of the baryonic feedback parameter with the constraints on its lower and upper limits from cosmic shear.We use the public data from the Kilo-Degree Survey and the VISTA Kilo-Degree Infrared Galaxy Survey spanning 450 deg2. Estimating both cosmological and feedback parameters simultaneously, we obtain Ab= 1.01+ 0.80-0.85 which shows a consistency with the dark matter-only (DMO) case at the ~1.2σ level and a tendency toward positive feedback; the Ab=0 (0.81) value corresponds to the DMO (OWLS AGN) case. Despite this full constraint of the feedback parameter, our S8 (≡σ8 √m/0.3 ) measurement ( 0.739+0.036-0.035) shifts by only ~6% of the statistical error, compared to the previous measurement. When we assume the flat ΛCDM cosmology favored by the Nine-Year Wilkinson Microwave Anisotropy Probe (Planck) result, the feedback parameter is constrained to be Ab =1.21+0.61- 0.54( 1.60+0.53-0.52), which excludes the DMO case at the ~2.2σ (~3.1σ) level.

Original language	English
Article number	abcd9e
Journal	Astrophysical Journal
Volume	908
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/abcd9e
Publication status	Published - 2021 Feb 10

Bibliographical note

Funding Information:
We thank Nora Elisa Chisari, Henk Hoekstra, Tilman Tröster, Shahab Joudaki, Angus H. Wright, Alexander Mead, Hendrik Hildebrandt, and Catherine Heymans for carefully reading the manuscript and providing useful comments. M.Y acknowledges support from the Max Planck Society and the Alexander von Humboldt Foundation in the framework of the Max Planck- Humboldt Research Award endowed by the Federal Ministry of Education and Research. M.Y also acknowledges support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) under no.2019R1C1C1010942. M.J.J acknowledges support for the current research from the National Research Foundation of Korea under the program nos. 2017R1A2B2004644 and 2017R1A4A1015178.

Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.3847/1538-4357/abcd9e

Cite this

@article{5cd63802e5aa431284d2c03c71792ee9,

title = "Baryonic feedback measurement from KV450 cosmic shear analysis",

abstract = "While baryonic feedback is one of the most important astrophysical systematics that we need to address in order to achieve precision cosmology, few weak lensing studies have directly measured its impact on the matter power spectrum. We report measurement of the baryonic feedback parameter with the constraints on its lower and upper limits from cosmic shear.We use the public data from the Kilo-Degree Survey and the VISTA Kilo-Degree Infrared Galaxy Survey spanning 450 deg2. Estimating both cosmological and feedback parameters simultaneously, we obtain Ab= 1.01+ 0.80-0.85 which shows a consistency with the dark matter-only (DMO) case at the ~1.2σ level and a tendency toward positive feedback; the Ab=0 (0.81) value corresponds to the DMO (OWLS AGN) case. Despite this full constraint of the feedback parameter, our S8 (≡σ8 √m/0.3 ) measurement ( 0.739+0.036-0.035) shifts by only ~6% of the statistical error, compared to the previous measurement. When we assume the flat ΛCDM cosmology favored by the Nine-Year Wilkinson Microwave Anisotropy Probe (Planck) result, the feedback parameter is constrained to be Ab =1.21+0.61- 0.54( 1.60+0.53-0.52), which excludes the DMO case at the ~2.2σ (~3.1σ) level.",

author = "Mijin Yoon and Jee, {M. James}",

note = "Funding Information: We thank Nora Elisa Chisari, Henk Hoekstra, Tilman Tr{\"o}ster, Shahab Joudaki, Angus H. Wright, Alexander Mead, Hendrik Hildebrandt, and Catherine Heymans for carefully reading the manuscript and providing useful comments. M.Y acknowledges support from the Max Planck Society and the Alexander von Humboldt Foundation in the framework of the Max Planck- Humboldt Research Award endowed by the Federal Ministry of Education and Research. M.Y also acknowledges support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) under no.2019R1C1C1010942. M.J.J acknowledges support for the current research from the National Research Foundation of Korea under the program nos. 2017R1A2B2004644 and 2017R1A4A1015178. Publisher Copyright: {\textcopyright} 2021. The American Astronomical Society. All rights reserved.",

year = "2021",

month = feb,

day = "10",

doi = "10.3847/1538-4357/abcd9e",

language = "English",

volume = "908",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Baryonic feedback measurement from KV450 cosmic shear analysis

AU - Yoon, Mijin

AU - Jee, M. James

N1 - Funding Information: We thank Nora Elisa Chisari, Henk Hoekstra, Tilman Tröster, Shahab Joudaki, Angus H. Wright, Alexander Mead, Hendrik Hildebrandt, and Catherine Heymans for carefully reading the manuscript and providing useful comments. M.Y acknowledges support from the Max Planck Society and the Alexander von Humboldt Foundation in the framework of the Max Planck- Humboldt Research Award endowed by the Federal Ministry of Education and Research. M.Y also acknowledges support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) under no.2019R1C1C1010942. M.J.J acknowledges support for the current research from the National Research Foundation of Korea under the program nos. 2017R1A2B2004644 and 2017R1A4A1015178. Publisher Copyright: © 2021. The American Astronomical Society. All rights reserved.

PY - 2021/2/10

Y1 - 2021/2/10

N2 - While baryonic feedback is one of the most important astrophysical systematics that we need to address in order to achieve precision cosmology, few weak lensing studies have directly measured its impact on the matter power spectrum. We report measurement of the baryonic feedback parameter with the constraints on its lower and upper limits from cosmic shear.We use the public data from the Kilo-Degree Survey and the VISTA Kilo-Degree Infrared Galaxy Survey spanning 450 deg2. Estimating both cosmological and feedback parameters simultaneously, we obtain Ab= 1.01+ 0.80-0.85 which shows a consistency with the dark matter-only (DMO) case at the ~1.2σ level and a tendency toward positive feedback; the Ab=0 (0.81) value corresponds to the DMO (OWLS AGN) case. Despite this full constraint of the feedback parameter, our S8 (≡σ8 √m/0.3 ) measurement ( 0.739+0.036-0.035) shifts by only ~6% of the statistical error, compared to the previous measurement. When we assume the flat ΛCDM cosmology favored by the Nine-Year Wilkinson Microwave Anisotropy Probe (Planck) result, the feedback parameter is constrained to be Ab =1.21+0.61- 0.54( 1.60+0.53-0.52), which excludes the DMO case at the ~2.2σ (~3.1σ) level.

AB - While baryonic feedback is one of the most important astrophysical systematics that we need to address in order to achieve precision cosmology, few weak lensing studies have directly measured its impact on the matter power spectrum. We report measurement of the baryonic feedback parameter with the constraints on its lower and upper limits from cosmic shear.We use the public data from the Kilo-Degree Survey and the VISTA Kilo-Degree Infrared Galaxy Survey spanning 450 deg2. Estimating both cosmological and feedback parameters simultaneously, we obtain Ab= 1.01+ 0.80-0.85 which shows a consistency with the dark matter-only (DMO) case at the ~1.2σ level and a tendency toward positive feedback; the Ab=0 (0.81) value corresponds to the DMO (OWLS AGN) case. Despite this full constraint of the feedback parameter, our S8 (≡σ8 √m/0.3 ) measurement ( 0.739+0.036-0.035) shifts by only ~6% of the statistical error, compared to the previous measurement. When we assume the flat ΛCDM cosmology favored by the Nine-Year Wilkinson Microwave Anisotropy Probe (Planck) result, the feedback parameter is constrained to be Ab =1.21+0.61- 0.54( 1.60+0.53-0.52), which excludes the DMO case at the ~2.2σ (~3.1σ) level.

UR - http://www.scopus.com/inward/record.url?scp=85101530741&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85101530741&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/abcd9e

DO - 10.3847/1538-4357/abcd9e

M3 - Article

AN - SCOPUS:85101530741

SN - 0004-637X

VL - 908

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - abcd9e

ER -

Baryonic feedback measurement from KV450 cosmic shear analysis

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this