Revisiting the unification of tidal disruption events with polarimetry

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Volume 705 (January 2026)

A&A, 705 (2026) A250

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Table B.1.

Measurements and limits on the interstellar polarisation.

TDE	P_max (%)	P_max (%)	P_max (%)	Distance	P_avg (%)	P_dist (%)	Distance
	(extinction)	(measured)	(Serkowski)	(kpc)	(Heiles)	(Heiles)	(kpc)
AT 2018hyz	0.39	...	...	...	0.15±0.04	0.18±0.08	0.41-0.45

AT 2019lwu	0.429	0.22±0.03 (B)	...	0.5–4.3	0.05±0.01	0.060±0.035	0.05–0.18

AT 2020zso	0.780	0.74±0.02 (B)	0.73±0.03	0.4–0.80	0.33±0.01	0.260±0.038	0.10–0.27
		0.72±0.03 (B)	0.75±0.31
		0.77±0.+03 (B)	0.72±0.19

AT 2021blz	0.234	0.14±0.04 (B)	0.11±0.13	0.9–2.5	0.065±0.035	0.020±0.035	0.18–0.19
		0.12±0.03(B)	0.04±0.25

AT 2022bdw	0.559	0.23±0.04 (B)	0.21±0.04	1.3–1.5	0.06±0.02	0.071±0.044	0.15–3.27

AT 2022dsb	2.665	0.18±0.01 (R)	0.17±0.01	1.3–4.3	0.27±0.01	0.650±0.200	0.11–0.17

AT 2022exr	0.754	0.05±0.02 (V)	...	0.5–3.6	0.11±0.04	0.12±0.04	0.02-0.25

AT 2022hvp	0.91	...	...	...	...	...	...

AT 2023mhs	0.260	...	...	...	0.07±0.02	0.260±0.070	0.10–0.53

Notes. Columns: (1) TDE name; (2) P_max estimated from the extinction in the direction of the TDE, assuming P_max = 13 × E(B − V); (3) maximum measured polarisation of field stars, with the FORS2 broadband filter in which it is maximum in parentheses; (4) P_max estimated from a Serkowski fit to the multi-band polarimetry of field stars; (5) range of distances from Earth in which the used field stars lie; (6) average polarisation of stars from the Heiles catalogue; (7) polarisation of the most distant star from the Heiles catalogue; (8) range of distances from Earth in which the stars from the Heiles catalogue lie. The second epoch of AT 2020zso has been omitted from the table, as it is unreliable. AT 2018hyz, AT 2022hvp, and AT 2023mhs do not have suitable field stars to estimate the ISP, and for AT 2022hvp there were no sources in the Heiles catalogue within 4°.

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