Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b - INSPIRE

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Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b

Jul, 2007

5 pages

Published in:

Astron.Astrophys. 471 (2007) L51

e-Print:

0707.2261 [astro-ph]

DOI:

10.1051/0004-6361:20078283

View in:

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Abstract: (arXiv)

We present Spitzer Space Telescope infrared photometry of a primary transit of the hot Neptune GJ 436b. The observations were obtained using the 8 microns band of the InfraRed Array Camera (IRAC). The high accuracy of the transit data and the weak limb-darkening in the 8 microns IRAC band allow us to derive (assuming M = 0.44 +- 0.04 Msun for the primary) a precise value for the planetary radius (4.19 +0.21-0.16 Rearth), the stellar radius (0.463 +0.022-0.017 Rsun), the orbital inclination (85.90 +0.19-0.18 degrees) and transit timing (2454280.78186 +0.00015-0.00008 HJD). Assuming current planet models, an internal structure similar to that of Neptune with a small H/He envelope is necessary to account for the measured radius of GJ 436b.

References(24)

Figures(0)

Phase-dependent properties of extrasolar planet atmospheres

Travis S. Barman
(
- UCLA
)
,
Peter H. Hauschildt
(
- Hamburg Observ.
)
,
France Allard
(
- Lyon, Ecole Normale Superieure
)

- Astrophys.J. 632 (2005) 1132-1139
•
e-Print:
- astro-ph/0507136
•
DOI:
- 10.1086/444349

- Astrophys.J. 661 191

The harps search for southern extra-solar planets. 6. a neptune-mass planet around the nearby m dwarf gl 581

Xavier Bonfils
(
- Grenoble Observ. and
- Geneva Observ.
)
,
T. Forveille
(
- Canada France Hawaii Telescope and
- Grenoble Observ.
)
,
X. Delfosse
(
- Grenoble Observ.
)
,
S. Udry
(
- Geneva Observ.
)
,
M. Mayor
(
- Geneva Observ.
)

et al.

- Astron.Astrophys. 443 (2005) L15
•
e-Print:
- astro-ph/0509211
•
DOI:
- 10.1051/0004-6361:200500193

A Neptune-mass planet orbiting the nearby M dwarf GJ 436

Paul Butler
(
- Carnegie Inst., Wash., D.C., DTM and
- Lick Observ. and
- UC, Berkeley, Astron. Dept. and
- San Francisco State U. and
- Tennessee State U. and
- Vanderbilt U. and
- NASA, Ames
)
,
Steven S. Vogt
(
- Carnegie Inst., Wash., D.C., DTM and
- Lick Observ. and
- UC, Berkeley, Astron. Dept. and
- San Francisco State U. and
- Tennessee State U. and
- Vanderbilt U. and
- NASA, Ames
)
,
Geoffrey W. Marcy
(
- Carnegie Inst., Wash., D.C., DTM and
- Lick Observ. and
- UC, Berkeley, Astron. Dept. and
- San Francisco State U. and
- Tennessee State U. and
- Vanderbilt U. and
- NASA, Ames
)
,
Debra A. Fischer
(
- Carnegie Inst., Wash., D.C., DTM and
- Lick Observ. and
- UC, Berkeley, Astron. Dept. and
- San Francisco State U. and
- Tennessee State U. and
- Vanderbilt U. and
- NASA, Ames
)
,
Jason T. Wright
(
- Carnegie Inst., Wash., D.C., DTM and
- Lick Observ. and
- UC, Berkeley, Astron. Dept. and
- San Francisco State U. and
- Tennessee State U. and
- Vanderbilt U. and
- NASA, Ames
)

et al.

- Astrophys.J. 617 (2004) 580-588
•
e-Print:
- astro-ph/0408587
•
DOI:
- 10.1086/425173

Theoretical interpretation of the measurements of the secondary eclipses of TrES-1 and HD209458b

- Astrophys.J.Lett. 625 (2005) L135
•
e-Print:
- astro-ph/0503522
•
DOI:
- 10.1086/431242

Detection of thermal emission from an extrasolar planet

et al.

- Astrophys.J. 626 (2005) 523-529
•
e-Print:
- astro-ph/0503457
•
DOI:
- 10.1086/429991

Infrared radiation from an extrasolar planet

- Nature 434 (2005) 740-743
•
e-Print:
- astro-ph/0503554
•
DOI:
- 10.1038/nature03507

Strong infrared emission from the extrasolar planet hd 189733b

- Astrophys.J. 644 (2006) 560-564
•
e-Print:
- astro-ph/0602443
•
DOI:
- 10.1086/503358

The Infrared Array Camera (IRAC) for the Spitzer Space Telescope

IRAC

Collaboration

•

G.G. Fazio

et al.

- Astrophys.J.Suppl. 154 (2004) 10-17
•
e-Print:
- astro-ph/0405616
•
DOI:
- 10.1086/422843

Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits

Jonathan J. Fortney
(
- NASA, Ames and
- SETI Inst., Mtn. View
)
,
Mark S. Marley
(
- NASA, Ames
)
,
Jason W. Barnes
(
- Arizona U., Lunar Planetary Lab.
)

- Astrophys.J. 659 (2007) 1661-1672
•
e-Print:
- astro-ph/0612671
•
DOI:
- 10.1086/512120

- Astrophys.J. 658-2 115

- Nature 447 691

A map of the day-night contrast of the extrasolar planet HD 189733b

et al.

- Nature 447 (2007) 183-186
•
e-Print:
- 0705.0993
•
DOI:
- 10.1038/nature05782

A diagram for the evaporation status of extrasolar planets

Alain Lecavelier des Etangs
(
- Paris, Inst. Astrophys.
)

- Astron.Astrophys. 461 (2007) 1185
•
e-Print:
- astro-ph/0609744
•
DOI:
- 10.1051/0004-6361:20065014

- Icarus 169 449

Analytic light curves for planetary transit searches

Kaisey Mandel
(
- Caltech
)
,
Eric Agol
(
- Caltech
)

- Astrophys.J.Lett. 580 (2002) L171-L176
•
e-Print:
- astro-ph/0210099
•
DOI:
- 10.1086/345520

- Publ.Astron.Soc.Pac. 119-851 90

Accurate radius and mass of the transiting exoplanet OGLE-TR-132b

C. Moutou
(
- Marseille, Lab. Astrophys.
)
,
F. Pont
(
- Geneva Observ.
)
,
F. Bouchy
(
- Marseille, Lab. Astrophys.
)
,
M. Mayor
(
- Geneva Observ.
)

- Astron.Astrophys. 424 (2004) L31-L34
•
e-Print:
- astro-ph/0407635
•
DOI:
- 10.1051/0004-6361:200400048

The effect of red noise on planetary transit detection

- Mon.Not.Roy.Astron.Soc. 373 (2006) 231-242
•
e-Print:
- astro-ph/0608597
•
DOI:
- 10.1111/j.1365-2966.2006.11012.x

A Spitzer Infrared Radius for the Transiting Extrasolar Planet HD209458b

- Astrophys.J. 649 (2006) 1043-1047
•
e-Print:
- astro-ph/0606096
•
DOI:
- 10.1086/506503

A Spectrum of an Extrasolar Planet

L.Jeremy Richardson
(
- NASA, Goddard
)
,
Drake Deming
(
- NASA, Goddard
)
,
Karen Horning
(
- Florida Inst. Tech.
)
,
Sara Seager
(
- Carnegie Inst., Wash., D.C., DTM and
- MIT
)
,
Joseph Harrington
(
- Central Florida U.
)

- Nature 445 (2007) 892-895
•
e-Print:
- astro-ph/0702507
•
DOI:
- 10.1038/nature05636

A 7.5 earth-mass planet orbiting the nearby star, gj 876

et al.

- Astrophys.J. 634 (2005) 625-640
•
e-Print:
- astro-ph/0510508
•
DOI:
- 10.1086/491669

- Astron.Astrophys. 469 43

Resolving the surfaces of extrasolar planets with secondary eclipse light curves

- Astrophys.J. 649 (2006) 1020-1027
•
e-Print:
- astro-ph/0601092
•
DOI:
- 10.1086/506468