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  JWST Observations of Young protoStars (JOYS) - Outflows and accretion in the high-mass star-forming region IRAS 23385+6053

Beuther, H., van Dishoeck, E. F., Tychoniec, L., Gieser, C., Kavanagh, P. J., Perotti, G., et al. (2023). JWST Observations of Young protoStars (JOYS) - Outflows and accretion in the high-mass star-forming region IRAS 23385+6053. Astronomy and Astrophysics, 673: A121. doi:10.1051/0004-6361/202346167.

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 Creators:
Beuther, H., Author
van Dishoeck, E. F., Author
Tychoniec, L., Author
Gieser, C.1, Author           
Kavanagh, P. J., Author
Perotti, G., Author
van Gelder, M. L., Author
Klaassen, P., Author
Garatti, A. Caratti o, Author
Francis, L., Author
Rocha, W. R. M., Author
Slavicinska, K., Author
Ray, T., Author
Justtanont, K., Author
Linnartz, H., Author
Waelkens, C., Author
Colina, L., Author
Greve, T., Author
Güdel, M., Author
Henning, T., Author
Lagage, P.-O., AuthorVandenbussche, B., AuthorÖstlin, G., AuthorWright, G., Author more..
Affiliations:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: Context. X-ray observations of galaxy clusters are impacted by the presence of active galactic nuclei (AGNs) in a manner that is challenging to quantify, leading to biases in the detection and measurement of cluster properties for both astrophysics and cosmological applications.

Aims. We detect and characterise clusters contaminated by central AGNs within the XXL survey footprint and provide a systematic assessment of the cosmological impact of such systems in X-ray cluster samples.

Methods. We introduce a new automated class for AGN-contaminated (AC) clusters in the XXL source detection pipeline. The majority of these systems are otherwise missed by current X-ray cluster-detection methods. The AC selection is also effective in distinguishing AGN and cool-core presence using supplementary optical and infrared information.

Results. We present 33 AC objects, including 25 clusters in the redshift range, 0.14 ≤ z ≤ 1.03, and eight other sources with significantly peaked central profiles based on X-ray observations. Six of these are new confirmed clusters. We computed the missed fraction of the XXL survey, which is defined as the fraction of genuine clusters that are undetected due to their centrally peaked X-ray profiles. We report seven undetected AC clusters above z > 0.6, in the range where X-ray cluster detection efficiency drops significantly. The missed fraction is estimated to be at the level of 5% for the 50 square-degree XXL area. The impact on cosmological estimates from missed clusters is negligible for XXL, but it produces a tension of ∼3σ with the fiducial cosmology when considering larger survey areas.

Conclusions. This work demonstrates the first systematic attempt to quantify the percentage of missed clusters in X-ray surveys as a result of central AGN contamination. Looking towards surveys such as eROSITA and Athena, larger areas and increased sensitivity will significantly enhance cluster detection, and therefore robust methods for characterising AGN contamination will be crucial for precise cluster cosmology, particularly in the redshift z > 1 regime.

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Language(s): eng - English
 Dates: 2023-05-18
 Publication Status: Published online
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202346167
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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 673 Sequence Number: A121 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1