2025A&A...700A..21S

Query : 2025A&A...700A..21S

2025A&A...700A..21S - Astronomy and Astrophysics, volume 700A21 (2025/8-1)

Direct imaging discovery of a young giant planet orbiting on Solar System scales.

STOLKER T., SAMLAND M., WATERS L.B.F.M., VAN DEN ANCKER M.E., BALMER W.O., LACOUR S., SITKO M.L., WANG J.J., NOWAK M., MAIRE A.-L., KAMMERER J., OTTEN G.P.P.L., ABUTER R., AMORIM A., BENISTY M., BERGER J.-P., BEUST H., BLUNT S., BOCCALETTI A., BONNEFOY M., BONNET H., BORDONI M.S., BOURDAROT G., BRANDNER W., CANTALLOUBE F., CASELLI P., CHARNAY B., CHAUVIN G., CHAVEZ A., CHOMEZ A., CHOQUET E., CHRISTIAENS V., CLENET Y., COUDE DU FORESTO V., CRIDLAND A., DAVIES R., DEMBET R., DEXTER J., DOMINIK C., DRESCHER A., DUVERT G., ECKART A., EISENHAUER F., FORSTER SCHREIBER N.M., GARCIA P., GARCIA LOPEZ R., GARDNER T., GENDRON E., GENZEL R., GILLESSEN S., GIRARD J.H., GRANT S., HAUBOIS X., HEISSEL G., HENNING T., HINKLEY S., HIPPLER S., HOULLE M., HUBERT Z., JOCOU L., KEPPLER M., KERVELLA P., KREIDBERG L., KURTOVIC N.T., LAGRANGE A.-M., LAPEYRERE V., LE BOUQUIN J.-B., LUTZ D., MANG F., MARLEAU G.-D., MERAND A., MIN M., MOLLIERE P., MONNIER J.D., MORDASINI C., MOUILLET D., NASEDKIN E., OTT T., PALADINI C., PAUMARD T., PERRAUT K., PERRIN G., PFUHL O., POURRE N., PUEYO L., QUANZ S.P., RIBEIRO D.C., RICKMAN E., RUSTAMKULOV Z., SHANGGUAN J., SHIMIZU T., SING D., STADLER J., STRAUB O., STRAUBMEIER C., STURM E., TACCONI L.J., VAN DISHOECK E.F., VIGAN A., VINCENT F., VON FELLENBERG S.D., WIDMANN F., WINTERHALDER T.O., WOILLEZ J. and YAZICI S.

Abstract (from CDS):

Context. HD 135344 AB is a young visual binary system that is best known for the protoplanetary disk around the secondary star. The circumstellar environment of the A0-type primary star, on the other hand, is already depleted. HD 135344 A is therefore an ideal target for the exploration of recently formed giant planets because it is not obscured by dust.
Aims. We searched for and characterized substellar companions to HD 135344 A down to separations of about 10 au.
Methods. We observed HD 135344 A with VLT/SPHERE in the H23 and K12 bands and obtained YJ and YJH spectroscopy. In addition, we carried out VLTI/GRAVITY observations for the further astrometric and spectroscopic confirmation of a detected companion.
Results. We discovered a close-in young giant planet, HD 135344 Ab, with a mass of about 10 MJ. The multi-epoch astrometry confirms the bound nature based on common parallax and common proper motion. This firmly rules out the scenario of a non-stationary background star. The semi-major axis of the planetary orbit is approximately 15-20 au, and the photometry is consistent with that of a mid L-type object. The inferred atmospheric and bulk parameters further confirm the young and planetary nature of the companion.
Conclusions. HD 135344 Ab is one of the youngest directly imaged planets that has fully formed and orbits on Solar System scales. It is a valuable target for studying the early evolution and atmosphere of a giant planet that could have formed in the vicinity of the snowline.

Abstract Copyright: © The Authors 2025

Journal keyword(s): techniques: high angular resolution - planets and satellites: detection - planets and satellites: gaseous planets - stars: individual: HD 135344 A

Simbad objects: 32

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Number of rows : 32
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 HD 13724b Pl 02 12 20.6772821184 -46 48 58.954833684           ~ 16 0
2 HD 19467B BD* 03 07 18.48 -13 45 43.3           T5.5+1 57 0
3 * 51 Eri b Pl 04 37 36.1326090888 -02 28 24.775726260           ~ 238 0
4 NAME AF Lep b Pl 05 27 04.7633281608 -11 54 03.466002240           ~ 75 0
5 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 2087 1
6 * bet Pic c Pl 05 47 17.0876901 -51 03 59.441135           ~ 108 0
7 * bet Pic b Pl 05 47 17.0876901 -51 03 59.441135           ~ 627 1
8 HD 95086b Pl 10 57 03.0215719872 -68 40 02.449216128           ~ 127 1
9 HD 115470b Pl? 13 18 05.1042607440 -44 03 19.380018204           ~ 15 0
10 HD 116434C BD* 13 24 36.13 -51 30 16.7           L5-7 123 1
11 NAME TYC 8998-760-1 c Pl 13 25 12.1262905080 -64 56 20.688979668           ~ 30 0
12 NAME TYC 8998-760-1B LM* 13 25 12.33 -64 56 19.7           ~ 71 0
13 CD-40 8434 TT* 14 08 10.1545500744 -41 23 52.573291080   13.42 12.18 11.71 10.506 K7IVe 546 0
14 CD-40 8434c Pl 14 08 10.1545500744 -41 23 52.573291080           ~ 240 0
15 CD-40 8434b Pl 14 08 10.1545500744 -41 23 52.573291080           ~ 295 0
16 HD 131399A * 14 54 25.3089604512 -34 08 34.038969972   7.16 7.08     A1V 19 0
17 HD 135344B Or* 15 15 48.4460065200 -37 09 16.024369824   9.21 8.708     F8V 548 0
18 HD 135344 Or* 15 15 48.9462675744 -37 08 55.731368400   7.84 7.76     A0V 155 1
19 HD 135344Ab Pl? 15 15 48.9462675744 -37 08 55.731368400           ~ 4 0
20 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
21 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
22 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
23 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
24 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 364 0
25 * b03 Cyg b Pl 20 14 32.0323540824 +36 48 22.700909124           ~ 22 0
26 HD 206893B BD? 21 45 21.9 -12 47 00           ~ 19 0
27 HD 206893c Pl 21 45 21.9052532928 -12 47 00.060804636           ~ 35 0
28 HD 206893 PM* 21 45 21.9052532928 -12 47 00.060804636   7.11 6.67     F5V 143 0
29 HD 218396b Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 323 1
30 HD 218396d Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 286 1
31 HD 218396c Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 312 1
32 HD 218396e Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 255 1

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