SIMBAD references

2016ApJ...824..121D - Astrophys. J., 824, 121-121 (2016/June-3)

Spectroscopic characterization of HD 95086 b with the Gemini planet imager.

DE ROSA R.J., RAMEAU J., PATIENCE J., GRAHAM J.R., DOYON R., LAFRENIERE D., MACINTOSH B., PUEYO L., RAJAN A., WANG J.J., WARD-DUONG K., HUNG L.-W., MAIRE J., NIELSEN E.L., AMMONS S.M., BULGER J., CARDWELL A., CHILCOTE J.K., GALVEZ R.L., GERARD B.L., GOODSELL S., HARTUNG M., HIBON P., INGRAHAM P., JOHNSON-GROH M., KALAS P., KONOPACKY Q.M., MARCHIS F., MAROIS C., METCHEV S., MORZINSKI K.M., OPPENHEIMER R., PERRIN M.D., RANTAKYRO F.T., SAVRANSKY D. and THOMAS S.

Abstract (from CDS):

We present new H (1.5-1.8 µm) photometric and K1 (1.9-2.2 µm) spectroscopic observations of the young exoplanet HD 95086 b obtained with the Gemini Planet Imager. The H-band magnitude has been significantly improved relative to previous measurements, whereas the low-resolution K1 ( λ/δλ~66 ) spectrum is featureless within the measurement uncertainties and presents a monotonically increasing pseudo-continuum consistent with a cloudy atmosphere. By combining these new measurements with literature L^′ photometry, we compare the spectral energy distribution (SED) of the planet to other young planetary-mass companions, field brown dwarfs, and to the predictions of grids of model atmospheres. HD 95086 b is over a magnitude redder in {K}_{1}-L^′ color than 2MASS J12073346-3932539 b and HR 8799 c and d, despite having a similar L^′ magnitude. Considering only the near-infrared measurements, HD 95086 b is most analogous to the brown dwarfs 2MASS J2244316+204343 and 2MASS J21481633+4003594, both of which are thought to have dusty atmospheres. Morphologically, the SED of HD 95086 b is best fit by low temperature ( {T}_{eff} =800-1300 K), low surface gravity spectra from models which simulate high photospheric dust content. This range of effective temperatures is consistent with field L/T transition objects, but the spectral type of HD 95086 b is poorly constrained between early L and late T due to its unusual position the color-magnitude diagram, demonstrating the difficulty in spectral typing young, low surface gravity substellar objects. As one of the reddest such objects, HD 95086 b represents an important empirical benchmark against which our current understanding of the atmospheric properties of young extrasolar planets can be tested.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: planetary systems - instrumentation: adaptive optics - planets and satellites: atmospheres - stars: individual: HD 95086

Simbad objects: 20

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2021.01.16-20:12:32

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