Mid-infrared evidence for iron-rich dust in the multi-ringed inner disk of HD 144432

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Volume 681 (January 2024)

A&A, 681 (2024) A47

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This article has an erratum: [https://doi.org/10.1051/0004-6361/202554515e]

Table 1

Overview of VLTI observations of HD 144432 used in our work.

Instrument	Target					Calibrator			Band
	Date and time	Seeing	τ₀	Stations	Array	name	LDD	Time
	(UTC)	(″)	(ms)				(mas)	(UTC)
PIONIER	2013-06-07T02:52	0.7	8.0	K0-A1-G1-J3	Large				H
PIONIER	2013-06-17T02:46	0.6	5.2	D0-G1-H0-I1	Medium				H
PIONIER	2013-07-03T04:03	1.3	2.7	D0-A1-C1-B2	Small				H
GRAVITY	2018-03-05T08:29	0.5	11.0	A0-G1-J2-J3	Large				K
MATISSE	2019-05-06T07:33	0.5	6.2	K0-G1-D0-J3	Large	56 Hya	1.2	07:17	L
GRAVITY	2019-05-24T04:38	0.9	2.8	A0-G1-J2-J3	Large				K
MATISSE	2019-09-02T01:19	0.6	6.2	A0-B2-D0-C1	Small	H Sco	4.7	01:57	L (chopped)
GRA4MAT	2022-03-09T09:10	0.4	16.8	K0-G2-D0-J3	Medium	HD 138816	2.1	08:41	L (chopped)^(a)
GRA4MAT	2022-03-09T09:10	0.4	16.8	K0-G2-D0-J3	Medium	HD 138816	2.1	08:41	M (chopped)^(a)
GRA4MAT	2022-03-22T09:11	0.9	3.8	U1-U2-U3-U4	UTs	HD 151051	2.3	08:39	L
MATISSE	2022-03-22T09:11	0.8	5.2	U1-U2-U3-U4	UTs	HD 151051	2.3	08:39	M (chopped)
GRA4MAT	2022-03-22T09:11	0.9	3.8	U1-U2-U3-U4	UTs	HD 151051	2.3	08:39	N
GRA4MAT	2022-04-04T08:23	0.8	3.8	A0-G1-J2-J3	Large	27 Sco	2.6	08:51	L (chopped)
GRA4MAT	2022-04-04T08:23	0.8	3.8	A0-G1-J2-J3	Large	27 Sco	2.6	08:51	M (chopped)

Notes. The τ₀ is the atmospheric coherence time. LDD (limb darkened diameter) is the estimated angular diameter of the calibrator. GRA4MAT is the new instrument mode of MATISSE, which uses the GRAVITY fringe tracker to stabilize the MATISSE fringes. ^(a)Only the BCD IN-IN data were used.

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