The warm-hot intergalactic medium in inter-cluster filaments

J 2025

The warm-hot intergalactic medium in inter-cluster filaments

ZHAO, Yuanyuan; Haiguang XU; Ang LIU; Xiaoyuan ZHANG; Li JI et al.

Základní údaje

Originální název

The warm-hot intergalactic medium in inter-cluster filaments

Autoři

ZHAO, Yuanyuan; Haiguang XU; Ang LIU; Xiaoyuan ZHANG; Li JI; Jiang CHANG; Dan HU; Norbert WERNER; Zhongli ZHANG; Wei CUI a Xiangping WU

Vydání

ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2025, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.800 v roce 2024

Označené pro přenos do RIV

Ano

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

instrumentation: detectors; techniques: imaging spectroscopy; intergalactic medium; large-scale structure of Universe

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 31. 3. 2025 09:43, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Context. Cosmological simulations indicate that nearly half of the baryons in the nearby Universe are in the warm-hot intergalactic medium (WHIM) phase, and about a half them reside in cosmic filaments connecting galaxy clusters. Recent observational studies using stacked survey data and deep exposures of galaxy cluster outskirts have detected soft X-ray excesses associated with optically identified filaments. However, the physical characteristics of WHIM in filaments remain largely undetermined due to a lack of direct spectral diagnostics of individual targets, which are limited by the spectral resolution of current instruments in the soft X-ray band. Aims. We aim to select appropriate targets for WHIM characterization through pointing observations with the future Hot Universe Baryon Surveyor (HUBS) mission, which is designed with eV-level energy resolution in the 0.1-2.0 keV band and a one-square-degree field of view, thus complementing other planned microcalorimetry missions such as Athena. Methods. We built a sample of 1577 inter-cluster filaments based on the first eROSITA All-Sky Survey (eRASS1) supercluster catalog and estimated their soft X-ray emission. Their modeled emission and geometrical properties were used to select candidate targets for HUBS observations. Results. Four inter-cluster filaments were selected as the most appropriate candidates. By simulating and analyzing their mock observations, we demonstrated that with 200 ks HUBS exposure for each candidate, the gas properties of individual filaments can be accurately determined, with the temperature constrained to +/- 0.01 keV, metallicity constrained to <= +/- 0.03 solar, and density constrained to < +/- 10%. Elemental abundances of O, Ne, Mg, and Fe can be measured separately, providing unprecedented insights into the chemical history of the filament gas. We also show that direct mapping of the WHIM distribution is promising with narrowband imaging of the O VIII line. Conclusions. Our work forecasts that next-generation X-ray missions such as HUBS will provide substantial improvement in our understanding of the physical status and evolution history of the diffuse WHIM gas in the cosmic large-scale structure.

Návaznosti

GX21-13491X, projekt VaV

Název: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Akronym: EHU)

Investor: Grantová agentura ČR, Exploring the Hot Universe and Understanding Comic Feedback

Citovat

ZHAO, Yuanyuan; Haiguang XU; Ang LIU; Xiaoyuan ZHANG; Li JI; Jiang CHANG; Dan HU; Norbert WERNER; Zhongli ZHANG; Wei CUI a Xiangping WU. The warm-hot intergalactic medium in inter-cluster filaments. ASTRONOMY & ASTROPHYSICS. LES ULIS CEDEX A: EDP SCIENCES S A, 2025, roč. 695, March, s. 1-16. ISSN 0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202452543.

@article{2483620,
   author = {Zhao, Yuanyuan and Xu, Haiguang and Liu, Ang and Zhang, Xiaoyuan and Ji, Li and Chang, Jiang and Hu, Dan and Werner, Norbert and Zhang, Zhongli and Cui, Wei and Wu, Xiangping},
   article_location = {LES ULIS CEDEX A},
   article_number = {March},
   doi = {https://doi.org/10.1051/0004-6361/202452543},
   keywords = {instrumentation: detectors; techniques: imaging spectroscopy; intergalactic medium; large-scale structure of Universe},
   language = {eng},
   issn = {0004-6361},
   journal = {ASTRONOMY & ASTROPHYSICS},
   title = {The warm-hot intergalactic medium in inter-cluster filaments},
   url = {https://doi.org/10.1051/0004-6361/202452543},
   volume = {695},
   year = {2025}
}

TY  - JOUR
ID  - 2483620
AU  - Zhao, Yuanyuan - Xu, Haiguang - Liu, Ang - Zhang, Xiaoyuan - Ji, Li - Chang, Jiang - Hu, Dan - Werner, Norbert - Zhang, Zhongli - Cui, Wei - Wu, Xiangping
PY  - 2025
TI  - The warm-hot intergalactic medium in inter-cluster filaments
JF  - ASTRONOMY & ASTROPHYSICS
VL  - 695
IS  - March
SP  - 1-16
EP  - 1-16
PB  - EDP SCIENCES S A
SN  - 00046361
KW  - instrumentation: detectors
KW  - techniques: imaging spectroscopy
KW  - intergalactic medium
KW  - large-scale structure of Universe
UR  - https://doi.org/10.1051/0004-6361/202452543
N2  - Context. Cosmological simulations indicate that nearly half of the baryons in the nearby Universe are in the warm-hot intergalactic medium (WHIM) phase, and about a half them reside in cosmic filaments connecting galaxy clusters. Recent observational studies using stacked survey data and deep exposures of galaxy cluster outskirts have detected soft X-ray excesses associated with optically identified filaments. However, the physical characteristics of WHIM in filaments remain largely undetermined due to a lack of direct spectral diagnostics of individual targets, which are limited by the spectral resolution of current instruments in the soft X-ray band. Aims. We aim to select appropriate targets for WHIM characterization through pointing observations with the future Hot Universe Baryon Surveyor (HUBS) mission, which is designed with eV-level energy resolution in the 0.1-2.0 keV band and a one-square-degree field of view, thus complementing other planned microcalorimetry missions such as Athena. Methods. We built a sample of 1577 inter-cluster filaments based on the first eROSITA All-Sky Survey (eRASS1) supercluster catalog and estimated their soft X-ray emission. Their modeled emission and geometrical properties were used to select candidate targets for HUBS observations. Results. Four inter-cluster filaments were selected as the most appropriate candidates. By simulating and analyzing their mock observations, we demonstrated that with 200 ks HUBS exposure for each candidate, the gas properties of individual filaments can be accurately determined, with the temperature constrained to +/- 0.01 keV, metallicity constrained to <= +/- 0.03 solar, and density constrained to < +/- 10%. Elemental abundances of O, Ne, Mg, and Fe can be measured separately, providing unprecedented insights into the chemical history of the filament gas. We also show that direct mapping of the WHIM distribution is promising with narrowband imaging of the O VIII line. Conclusions. Our work forecasts that next-generation X-ray missions such as HUBS will provide substantial improvement in our understanding of the physical status and evolution history of the diffuse WHIM gas in the cosmic large-scale structure.
ER  -

ZHAO, Yuanyuan; Haiguang XU; Ang LIU; Xiaoyuan ZHANG; Li JI; Jiang CHANG; Dan HU; Norbert WERNER; Zhongli ZHANG; Wei CUI a Xiangping WU. The warm-hot intergalactic medium in inter-cluster filaments. \textit{ASTRONOMY \&{} ASTROPHYSICS}. LES ULIS CEDEX A: EDP SCIENCES S A, 2025, roč.~695, March, s.~1-16. ISSN~0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202452543.

Přehled o publikaci