2016A&A...587A..57Z


Query : 2016A&A...587A..57Z

2016A&A...587A..57Z - Astronomy and Astrophysics, volume 587A, 57-57 (2016/3-1)

First light of the VLT planet finder SPHERE. III. New spectrophotometry and astrometry of the HR 8799 exoplanetary system.

ZURLO A., VIGAN A., GALICHER R., MAIRE A.-L., MESA D., GRATTON R., CHAUVIN G., KASPER M., MOUTOU C., BONNEFOY M., DESIDERA S., ABE L., APAI D., BARUFFOLO A., BAUDOZ P., BAUDRAND J., BEUZIT J.-L., BLANCARD P., BOCCALETTI A., CANTALLOUBE F., CARLE M., CASCONE E., CHARTON J., CLAUDI R.U., COSTILLE A., DE CAPRIO V., DOHLEN K., DOMINIK C., FANTINEL D., FEAUTRIER P., FELDT M., FUSCO T., GIGAN P., GIRARD J.H., GISLER D., GLUCK L., GRY C., HENNING T., HUGOT E., JANSON M., JAQUET M., LAGRANGE A.-M., LANGLOIS M., LLORED M., MADEC F., MAGNARD Y., MARTINEZ P., MAUREL D., MAWET D., MEYER M.R., MILLI J., MOELLER-NILSSON O., MOUILLET D., ORIGNE A., PAVLOV A., PETIT C., PUGET P., QUANZ S.P., RABOU P., RAMOS J., ROUSSET G., ROUX A., SALASNICH B., SALTER G., SAUVAGE J.-F., SCHMID H.M., SOENKE C., STADLER E., SUAREZ M., TURATTO M., UDRY S., VAKILI F., WAHHAJ Z., WILDI F. and ANTICHI J.

Abstract (from CDS):

The planetary system discovered around the young A-type HR8799 provides a unique laboratory to: a) test planet formation theories; b) probe the diversity of system architectures at these separations, and c) perform comparative (exo)planetology. We present and exploit new near-infrared images and integral-field spectra of the four gas giants surrounding HR8799 obtained with SPHERE, the new planet finder instrument at the Very Large Telescope, during the commissioning and science verification phase of the instrument (July-December 2014). With these new data, we contribute to completing the spectral energy distribution (SED) of these bodies in the 1.0-2.5µm range. We also provide new astrometric data, in particular for planet e, to further constrain the orbits. We used the infrared dual-band imager and spectrograph (IRDIS) subsystem to obtain pupil-stabilized, dual-band H2H3 (1.593µm, 1.667µm), K1K2 (2.110µm, 2.251µm), and broadband J (1.245µm) images of the four planets. IRDIS was operated in parallel with the integral field spectrograph (IFS) of SPHERE to collect low-resolution (R∼30), near-infrared (0.94-1.64µm) spectra of the two innermost planets HR8799d and e. The data were reduced with dedicated algorithms, such as the Karhunen-Loeve image projection (KLIP), to reveal the planets. We used the so-called negative planets injection technique to extract their photometry, spectra, and measure their positions. We illustrate the astrometric performance of SPHERE through sample orbital fits compatible with SPHERE and literature data. We demonstrated the ability of SPHERE to detect and characterize planets in this kind of systems, providing spectra and photometry of its components. The spectra improve upon the signal-to-noise ratio of previously obtained data and increase the spectral coverage down to the Y band. In addition, we provide the first detection of planet e in the J band. Astrometric positions for planets HR8799bcde are reported for the epochs of July, August, and December 2014. We measured the photometric values in J, H2H3, K1K2 bands for the four planets with a mean accuracy of 0.13mag. We found upper limit constraints on the mass of a possible planet f of 3-7MJup . Our new measurements are more consistent with the two inner planets d and e being in a 2d:1e or 3d:2e resonance. The spectra of HR8799d and e are well matched by those of L6-8 field dwarfs. However, the SEDs of these objects are redder than field L dwarfs longward of 1.6µm.

Abstract Copyright:

Journal keyword(s): techniques: image processing - astrometry - techniques: high angular resolution - techniques: spectroscopic - methods: data analysis

VizieR on-line data: <Available at CDS (J/A+A/587/A57): sp8799d.dat sp8799e.dat>

Simbad objects: 10

goto Full paper

goto View the references in ADS

Number of rows : 10
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 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3737 0
2 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 249 0
3 2MASS J15164306+3053443 BD* 15 16 43.06536 +30 53 44.3436           L8.0+L9.5 26 0
4 2MASSW J2148162+400359 BD* 21 48 16.2986589335 +40 03 59.331851811           L7 53 0
5 2MASS J22443167+2043433 BD* 22 44 31.67376 +20 43 43.3020           L6-L8gamma 84 0
6 HD 218396e Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 172 1
7 HD 218396c Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 233 1
8 HD 218396b Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 247 1
9 HD 218396d Pl 23 07 28.7156905667 +21 08 03.302133882           ~ 214 1
10 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1031 0

To bookmark this query, right click on this link: simbad:objects in 2016A&A...587A..57Z and select 'bookmark this link' or equivalent in the popup menu


2022.08.12-08:31:25

© Université de Strasbourg/CNRS

    • Contact