Optical polarization properties of the closest tidal disruption event AT 2023clx indicate origin from tidal stream shocks Article Swipe

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K. I. I. Koljonen , K. Nilsson , Ioannis Liodakis , E. Lindfors ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.1093/mnras/staf1340

Polarization observations of tidal disruption events offer unique insights into the accretion processes around supermassive black holes. Here, we present optical polarization observations of the nearby event AT 2023clx, obtained using the Nordic Optical Telescope. Our observations reveal a rise and subsequent decay in the polarization degree, temporally offset from the peak of the optical light curve, reaching maximum intrinsic polarization degree of $\sim$5 per cent. In addition, the polarization angle shifts by $\sim 60^\circ \!-\!100^\circ$ between 6 and 20 d after the optical peak, remaining stable thereafter. Remarkably, the observed polarization variability closely resembles that of AT 2020mot, strongly suggesting a common mechanism for accretion disc formation in these events. The variability in both polarization degree and angle supports models in which tidal stream shocks drive the optical outburst during the accretion disc formation.

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Physics Polarization (electrochemistry) Event (particle physics) Tidal force Astrophysics Astronomy Chemistry Physical chemistry

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Type: article
Language: en
Landing Page: https://doi.org/10.1093/mnras/staf1340
PDF: https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/staf1340/64078779/staf1340.pdf
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DOI: https://doi.org/10.1093/mnras/staf1340

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Title: Optical polarization properties of the closest tidal disruption event AT 2023clx indicate origin from tidal stream shocks

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Language: en

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Publication year: 2025

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Publication date: 2025-08-18

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Authors: K. I. I. Koljonen, K. Nilsson, Ioannis Liodakis, E. Lindfors

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Landing page: https://doi.org/10.1093/mnras/staf1340

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Concepts: Physics, Polarization (electrochemistry), Event (particle physics), Tidal force, Astrophysics, Astronomy, Chemistry, Physical chemistry

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Cited by: 1

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abstract_inverted_index.2020mot,	99
abstract_inverted_index.2023clx,	29
abstract_inverted_index.60^\circ	75
abstract_inverted_index.ABSTRACT	0
abstract_inverted_index.insights	9
abstract_inverted_index.observed	91
abstract_inverted_index.obtained	30
abstract_inverted_index.outburst	130
abstract_inverted_index.reaching	58
abstract_inverted_index.strongly	100
abstract_inverted_index.supports	120
abstract_inverted_index.accretion	12, 106, 133
abstract_inverted_index.addition,	68
abstract_inverted_index.formation	108
abstract_inverted_index.intrinsic	60
abstract_inverted_index.mechanism	104
abstract_inverted_index.processes	13
abstract_inverted_index.remaining	86
abstract_inverted_index.resembles	95
abstract_inverted_index.Telescope.	35
abstract_inverted_index.disruption	5
abstract_inverted_index.formation.	135
abstract_inverted_index.subsequent	42
abstract_inverted_index.suggesting	101
abstract_inverted_index.temporally	48
abstract_inverted_index.Remarkably,	89
abstract_inverted_index.thereafter.	88
abstract_inverted_index.variability	93, 113
abstract_inverted_index.Polarization	1
abstract_inverted_index.observations	2, 23, 37
abstract_inverted_index.polarization	22, 46, 61, 70, 92, 116
abstract_inverted_index.supermassive	15
abstract_inverted_index.\!-\!100^\circ$	76
cited_by_percentile_year.max	95
cited_by_percentile_year.min	91
countries_distinct_count	4
institutions_distinct_count	4
citation_normalized_percentile.value	0.91918302
citation_normalized_percentile.is_in_top_1_percent	False
citation_normalized_percentile.is_in_top_10_percent	True