2013A&A...549A..52E


Query : 2013A&A...549A..52E

2013A&A...549A..52E - Astronomy and Astrophysics, volume 549A, 52-52 (2013/1-1)

LBT observations of the HR 8799 planetary system. First detection of HR 8799e in H band.

ESPOSITO S., MESA D., SKEMER A., ARCIDIACONO C., CLAUDI R.U., DESIDERA S., GRATTON R., MANNUCCI F., MARZARI F., MASCIADRI E., CLOSE L., HINZ P., KULESA C., McCARTHY D., MALES J., AGAPITO G., ARGOMEDO J., BOUTSIA K., BRIGUGLIO R., BRUSA G., BUSONI L., CRESCI G., FINI L., FONTANA A., GUERRA J.C., HILL J.M., MILLER D., PARIS D., PINNA E., PUGLISI A., QUIROS-PACHECO F., RICCARDI A., STEFANINI P., TESTA V., XOMPERO M. and WOODWARD C.

Abstract (from CDS):

We have performed H and KS band observations of the planetary system around HR8799 using the new AO system at the Large Binocular Telescope and the PISCES Camera. The excellent instrument performance (Strehl ratios up to 80% in H band) enabled the detection of the innermost planet, HR8799e, at H band for the first time. The H and KS magnitudes of HR8799e are similar to those of planets c and d, with planet e being slightly brighter. Therefore, HR8799e is likely slightly more massive than c and d. We also explored possible orbital configurations and their orbital stability. We confirm that the orbits of planets b, c and e are consistent with being circular and coplanar; planet d should have either an orbital eccentricity of about 0.1 or be non-coplanar with respect to b and c. Planet e can not be in circular and coplanar orbit in a 4:2:1 mean motion resonances with c and d, while coplanar and circular orbits are allowed for a 5:2 resonance. The analysis of dynamical stability shows that the system is highly unstable or chaotic when planetary masses of about 5MJ for b and 7MJ for the other planets are adopted. Significant regions of dynamical stability for timescales of tens of Myr are found when adopting planetary masses of about 3.5, 5, 5, and 5MJ for HR8799b, c, d, and e respectively. These masses are below the current estimates based on the stellar age (30Myr) and theoretical models of substellar objects.

Abstract Copyright:

Journal keyword(s): stars: individual: HR 8799 - planetary systems - instrumentation: adaptive optics - techniques: high angular resolution - planets and satellites: dynamical evolution and stability - planets and satellites: physical evolution

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* DH Tau B LM* 04 29 41.66 +26 32 56.5           M9.25 69 1
2 2MASS J04414489+2301513 LM* 04 41 44.8970652648 +23 01 51.387815496       20.6   M8.7 62 1
3 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1549 1
4 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 249 0
5 CD-35 2722B BD* 06 09 19.2082646634 -35 49 31.062882043           L0-1 58 0
6 HD 44627B BD* 06 19 12.9988086984 -58 03 20.198341332           L1 121 1
7 TWA 27B BD* 12 07 33.50 -39 32 54.4           L3 261 0
8 BD+13 2618 Er* 13 00 46.5566863405 +12 22 32.677229903 12.314 11.233 9.750 8.785 7.653 M0V 325 1
9 NAME CFBDSIR 1458+1013B BD* 14 58 29.0 +10 13 43           T8+/Y? 24 1
10 HD 143567B LM* 16 01 55.65696 -21 58 53.0076           M8 31 0
11 RX J1609.5-2105B LM* 16 09 30.377 -21 04 56.97           ~ 105 0
12 GSC 06214-00210 TT* 16 21 54.6676915200 -20 43 09.140591496   13.62 12.38 12.11 11.08 M1e 64 0
13 NAME GSC 06214-00210B LM* 16 21 54.678 -20 43 11.33           ~ 68 0
14 NAME SR 12C LM* 16 27 19.6577175120 -24 41 49.239711024           M9.0 37 0
15 HD 203030B BD* 21 18 58.97 +26 13 46.1           L7.5 65 0
16 V* HN Peg B BD* 21 44 28.47168 +14 46 07.7988           T2.5 115 0
17 HD 218396c Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 233 1
18 HD 218396d Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 214 1
19 HD 218396e Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 172 1
20 HD 218396b Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 247 1
21 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1031 0

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2022.08.18-03:08:04

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