2014ApJ...796L..30C


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.16CET03:58:46

2014ApJ...796L..30C - Astrophys. J., 796, L30 (2014/December-1)

Recovery of the candidate protoplanet HD 100546 b with Gemini/NICI and detection of additional (Planet-induced?) disk structure at small separations.

CURRIE T., MUTO T., KUDO T., HONDA M., BRANDT T.D., GRADY C., FUKAGAWA M., BURROWS A., JANSON M., KUZUHARA M., McELWAIN M.W., FOLLETTE K., HASHIMOTO J., HENNING T., KANDORI R., KUSAKABE N., KWON J., MEDE K., MORINO J.-I., NISHIKAWA J., PYO T.-S., SERABYN G., SUENAGA T., TAKAHASHI Y., WISNIEWSKI J. and TAMURA M.

Abstract (from CDS):

We report the first independent, second epoch (re-)detection of a directly imaged protoplanet candidate. Using L' high-contrast imaging of HD 100546 taken with the Near-Infrared Coronagraph and Imager on Gemini South, we recover "HD 100546 b" with a position and brightness consistent with the original Very Large Telescope/NAos-COnica detection from Quanz et al., although data obtained after 2013 will be required to decisively demonstrate common proper motion. HD 100546 b may be spatially resolved, up to ~12-13 AU in diameter, and is embedded in a finger of thermal IR-bright, polarized emission extending inward to at least 0.''3. Standard hot-start models imply a mass of ~15 MJ. However, if HD 100546 b is newly formed or made visible by a circumplanetary disk, both of which are plausible, its mass is significantly lower (e.g., 1-7 MJ). Additionally, we discover a thermal IR-bright disk feature, possibly a spiral density wave, at roughly the same angular separation as HD 100546 b but 90° away. Our interpretation of this feature as a spiral arm is not decisive, but modeling analyses using spiral density wave theory implies a wave launching point exterior to ~0.''45 embedded within the visible disk structure: plausibly evidence for a second, hitherto unseen, wide-separation planet. With one confirmed protoplanet candidate and evidence for one to two others, HD 100546 is an important evolutionary precursor to intermediate-mass stars with multiple super-Jovian planets at moderate/wide separations like HR 8799.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: early-type - stars: individual: HD 100546

Simbad objects: 8

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Number of rows : 8

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 15b Pl 04 39 17.7912813350 +22 21 03.387667491           ~ 57 1
2 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1602 1
3 HD 95086 * 10 57 03.0216129217 -68 40 02.446874288   7.60 7.36     A8III 114 1
4 HD 100546b Pl? 11 33 25.4404858122 -70 11 41.239343121           ~ 32 0
5 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 616 1
6 NAME T Cha B TT* 11 55 04.8288074224 -79 19 11.053509386       16.59 13.26 M3 11 0
7 HD 169142 Ae* 18 24 29.7799676975 -29 46 49.328597698   8.42 8.16     F1VekA3mA3_lB? 305 2
8 HD 218396 El* 23 07 28.7156905667 +21 08 03.302133882   6.21 5.953     F0+VkA5mA5 859 1

    Equat.    Gal    SGal    Ecl

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2019.11.16-03:58:46

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