2018A&A...617A..44K


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:48:39

2018A&A...617A..44K - Astronomy and Astrophysics, volume 617A, 44-44 (2018/9-1)

Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70.

KEPPLER M., BENISTY M., MULLER A., HENNING T., VAN BOEKEL R., CANTALLOUBE F., GINSKI C., VAN HOLSTEIN R.G., MAIRE A.-L., POHL A., SAMLAND M., AVENHAUS H., BAUDINO J.-L., BOCCALETTI A., DE BOER J., BONNEFOY M., CHAUVIN G., DESIDERA S., LANGLOIS M., LAZZONI C., MARLEAU G.-D., MORDASINI C., PAWELLEK N., STOLKER T., VIGAN A., ZURLO A., BIRNSTIEL T., BRANDNER W., FELDT M., FLOCK M., GIRARD J., GRATTON R., HAGELBERG J., ISELLA A., JANSON M., JUHASZ A., KEMMER J., KRAL Q., LAGRANGE A.-M., LAUNHARDT R., MATTER A., MENARD F., MILLI J., MOLLIERE P., OLOFSSON J., PEREZ L., PINILLA P., PINTE C., QUANZ S.P., SCHMIDT T., UDRY S., WAHHAJ Z., WILLIAMS J.P., BUENZLI E., CUDEL M., DOMINIK C., GALICHER R., KASPER M., LANNIER J., MESA D., MOUILLET D., PERETTI S., PERROT C., SALTER G., SISSA E., WILDI F., ABE L., ANTICHI J., AUGEREAU J.-C., BARUFFOLO A., BAUDOZ P., BAZZON A., BEUZIT J.-L., BLANCHARD P., BREMS S.S., BUEY T., DE CAPRIO V., CARBILLET M., CARLE M., CASCONE E., CHEETHAM A., CLAUDI R., COSTILLE A., DELBOULBE A., DOHLEN K., FANTINEL D., FEAUTRIER P., FUSCO T., GIRO E., GLUCK L., GRY C., HUBIN N., HUGOT E., JAQUET M., LE MIGNANT D., LLORED M., MADEC F., MAGNARD Y., MARTINEZ P., MAUREL D., MEYER M., MOLLER-NILSSON O., MOULIN T., MUGNIER L., ORIGNE A., PAVLOV A., PERRET D., PETIT C., PRAGT J., PUGET P., RABOU P., RAMOS J., RIGAL F., ROCHAT S., ROELFSEMA R., ROUSSET G., ROUX A., SALASNICH B., SAUVAGE J.-F., SEVIN A., SOENKE C., STADLER E., SUAREZ M., TURATTO M. and WEBER L.

Abstract (from CDS):


Context. Young circumstellar disks are the birthplaces of planets. Their study is of prime interest to understand the physical and chemical conditions under which planet formation takes place. Only very few detections of planet candidates within these disks exist, and most of them are currently suspected to be disk features.
Aims. In this context, the transition disk around the young star PDS 70 is of particular interest, due to its large gap identified in previous observations, indicative of ongoing planet formation. We aim to search for the presence of an embedded young planet and search for disk structures that may be the result of disk-planet interactions and other evolutionary processes.
Methods. We analyse new and archival near-infrared images of the transition disk PDS 70 obtained with the VLT/SPHERE, VLT/NaCo, and Gemini/NICI instruments in polarimetric differential imaging and angular differential imaging modes.
Results. We detect a point source within the gap of the disk at about 195mas (∼22au) projected separation. The detection is confirmed at five different epochs, in three filter bands and using different instruments. The astrometry results in an object of bound nature, with high significance. The comparison of the measured magnitudes and colours to evolutionary tracks suggests that the detection is a companion of planetary mass. The luminosity of the detected object is consistent with that of an L-type dwarf, but its IR colours are redder, possibly indicating the presence of warm surrounding material. Further, we confirm the detection of a large gap of ∼54au in size within the disk in our scattered light images, and detect a signal from an inner disk component. We find that its spatial extent is very likely smaller than ∼17au in radius, and its position angle is consistent with that of the outer disk. The images of the outer disk show evidence of a complex azimuthal brightness distribution which is different at different wavelengths and may in part be explained by Rayleigh scattering from very small grains.
Conclusions. The detection of a young protoplanet within the gap of the transition disk around PDS 70 opens the door to a so far observationally unexplored parameter space of planetary formation and evolution. Future observations of this system at different wavelengths and continuing astrometry will allow us to test theoretical predictions regarding planet-disk interactions, planetary atmospheres, and evolutionary models.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: individual: PDS 70 - techniques: high angular resolution - protoplanetary disks - scattering - radiative transfer - planets and satellites: detection

Simbad objects: 18

goto Full paper

goto View the reference in ADS

Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 552 1
2 EM* LkCa 15b Pl 04 39 17.7912813350 +22 21 03.387667491           ~ 63 1
3 HD 36112 Ae* 05 30 27.5286772598 +25 19 57.082162439   8.57 8.27     A8Ve 358 0
4 CD-35 2722 ** 06 09 19.2082646634 -35 49 31.062882043   12.61 11.083 10.682 9.337 M1Ve 60 0
5 HD 95086b Pl 10 57 03.0216129217 -68 40 02.446874288           ~ 70 1
6 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 651 1
7 TWA 27 LM* 12 07 33.4676156527 -39 32 54.016042897     19.95 17.99 15.88 M8IVe 310 0
8 HD 106906B BD* 12 17 52.61 -55 58 26.6           L2.5 53 0
9 HD 116434 ** 13 24 36.0982987288 -51 30 16.046513257   7.08 6.98   6.87 A2V 36 0
10 HD 116434C BD* 13 24 36.13 -51 30 16.7           L5-7 30 1
11 CD-40 8434b Pl 14 08 10.1545137760 -41 23 52.576649494           ~ 50 0
12 CD-40 8434 TT* 14 08 10.1545137760 -41 23 52.576649494   13.42 12.18 11.71 10.506 K7IVe 119 0
13 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 358 1
14 RX J1609.5-2105B LM* 16 09 30.37 -21 04 57.0           ~ 94 0
15 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1120 1
16 HD 169142 Ae* 18 24 29.7799676975 -29 46 49.328597698   8.42 8.16     F1VekA3mA3_lB? 335 2
17 HD 206893 PM* 21 45 21.9056012837 -12 47 00.068065895   7.11 6.67     F5V 60 0
18 HD 218396 El* 23 07 28.7156905667 +21 08 03.302133882   6.21 5.953     F0+VkA5mA5 896 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018A&A...617A..44K and select 'bookmark this link' or equivalent in the popup menu


2020.07.08-03:48:39

© Université de Strasbourg/CNRS

    • Contact