2025AJ....170..202L


Query : 2025AJ....170..202L

2025AJ....170..202L - Astron. J., 170, 202 (2025/October-0)

A Coronagraphic Pilot Study of the Circumstellar Environments around Red Supergiants: CD -31°4916's Dust Morphology.

LOMAX J.R., LEVESQUE E.M., WISNIEWSKI J.P. and DEBES J.H.

Abstract (from CDS):

Many mechanisms have been proposed to contribute to massive-star mass loss, but in general little is known about the physics involved. Studies of circumstellar environments around massive stars might help to determine which mechanisms are the most common. With the recent advent of high-contrast, extreme adaptive optics, coronagraphic instruments, direct-imaging studies of massive-star circumstellar environments have become possible. With these instruments, one can directly observe regions closer to the star than ever before. We performed a pilot study to image red supergiant circumstellar environments using the Gemini Planet Imager on Gemini South. In this paper, we report on the first direct detection of circumstellar dust around CD -31°4916, an otherwise “normal” red supergiant. This dust appears in both the near-infrared and the optical, which we obtained with follow-up HST observations. The dust appears to be at least partially located in clumps within 1″ of the central star. Therefore, we believe that continued exploration of massive star circumstellar environments with these coronagraphic instruments is warranted, even for systems with no previously resolved circumstellar material, and may play a vital role in our understanding of their mass-loss physics.

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

Journal keyword(s): Stellar mass loss - Coronagraphic imaging - Circumstellar matter - Red supergiant stars

Simbad objects: 11

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Number of rows : 11
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
3 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1789 0
4 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1169 0
5 TYC 6551-975-1 SB* 07 36 43.1603611584 -28 17 30.016809240   12.31 10.26     ~ 2 0
6 NGC 2439 OpC 07 40 46.5 -31 41 36   7.31 6.9     ~ 150 0
7 V* V384 Pup s*r 07 41 02.6293485216 -31 40 59.096449344   10.81 8.77     M3Iab-Ib 63 0
8 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
9 * alf Sco s*r 16 29 24.45970 -26 25 55.2094 4.08 2.75 0.91 -0.64 -1.87 M1.5Iab+B2Vn 786 0
10 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0
11 V* RW Cep s*r 22 23 07.0152061200 +55 57 47.624368284 11.25 8.87 6.65 4.94 3.78 K2_0-Ia 181 0

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