2025ApJ...994..199M

Query : 2025ApJ...994..199M

2025ApJ...994..199M - Astrophys. J., 994, 199 (2025/December-1)

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. VI. Evidence for Radially Evolving Icy Grains in the HD 141569A Disk via NIRCam Coronagraphic Imaging.

MILLAR-BLANCHAER M.A., CHOQUET E., LAWSON K., MARINO S., KAMMERER J., CARTER A.L., REBOLLIDO I., LEISENRING J.M., KIM M., KALAS P., STAPELFELDT K.R., HINKLEY S., BOOTH M., GRADY C.A., MATTHEWS E.C., BILLER B.A., SKEMER A., GIRARD J.H., WOLFF S.G., WARD-DUONG K., MEYER M.R., BOCCALETTI A., PANTIN E., MATTHEWS B.C., METCHEV S., PERRIN M.D., CHEN C.H., CROTTS K., ABSIL O., BALMER W.O., CALISSENDORFF P., CUGNO G., CURRIE T., DANIELSKI C., HOCH K.K.W., JANSON M., MANJAVACAS E., LAGAGE P.-O., SUTLIEFF B.J., RAY S., REN B.B., RICKMAN E., SUAREZ G., THEISSEN C.A., UYAMA T., QUIRRENBACH A., WANG J.J., WHITEFORD N., WYATT M.C., ZURLO A. (The JWST ERS Collaboration)

Abstract (from CDS):

We present JWST NIRCam coronagraphic observations of the HD 141569A circumstellar disk, obtained as part of the JWST Early Release Science program. The observations recover the multi-ringed structure seen in previous shorter-wavelength observations, but at filters centered on the ∼3 μm water ice absorption feature and a complementary continuum region (F300M and F360M, respectively). The observations reveal apparent absorption between the F300M and F360M filters that decreases with radius, with a notable change around 200 au, between the innermost and outermost two rings. These results are consistent whether the data is reduced via deconvolution or through a forward-modeling approach. We demonstrate that these changes suggest a radial decrease in the water ice mass fraction by a factor of ∼3-10 and possibly a change in minimum grain size. We do not detect any point sources within the system and can exclude planetary companions 2 Jupiter masses and greater beyond 1″ radius (∼111 au). These observations and the subsequent analysis illustrate a robust pathway for using JWST/NIRCam to characterize the distribution of water ice in other circumstellar disks. We highlight some of the early lessons learned from this work that we hope will be useful for future circumstellar disk observation planning and analysis.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): James Webb Space Telescope - Coronagraphic imaging - Circumstellar disks - Direct imaging - High contrast techniques - Infrared observatories - Space observatories - Exoplanet astronomy

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* HK Tau B TT* 04 31 50.6002481212 +24 24 15.502558869           ~ 95 0
2 V* HV Tau C TT* 04 38 35.5125950280 +26 10 41.316576204         14.90 K6 110 0
3 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1176 2
4 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 894 1
5 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
6 SIPS J1256-1257B BD* 12 56 01.83264 -12 57 27.6912           L7 154 0
7 HD 116434 ** 13 24 36.0977360304 -51 30 16.044711840   7.08 6.98   6.87 A2V 95 0
8 HD 116434C BD* 13 24 36.13 -51 30 16.7           L5-7 123 1
9 HD 140986 * 15 46 45.4242428472 -06 07 13.285166412   7.410 6.245     K0III 23 0
10 HD 141569B * 15 49 57.3697381320 -03 55 11.321358456           ~ 3 0
11 HD 141569 Or* 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 578 0
12 HD 142527 Ae* 15 56 41.8882637904 -42 19 23.248281828   9.04 8.34     F6III 741 1
13 HD 181327 PM* 19 22 58.9437222504 -54 32 16.975668624   7.50 7.04   6.49 F6V 331 0
14 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0

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