Exoplanets and Stellar Physics

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From Cosmic Birth to Living Earths: The Future of UVOIR Space Astronomy

(2015)

Authors:

Julianne Dalcanton, Sara Seager, Suzanne Aigrain, Steve Battel, Niel Brandt, Charlie Conroy, Lee Feinberg, Suvi Gezari, Olivier Guyon, Walt Harris, Chris Hirata, John Mather, Marc Postman, Dave Redding, David Schiminovich, H Philip Stahl, Jason Tumlinson
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Modeling gravitational instabilities in self-gravitating protoplanetary disks with adaptive mesh refinement techniques

Astronomy & Astrophysics EDP Sciences 579 (2015) a32

Authors:

Tim Lichtenberg, Dominik RG Schleicher
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Transiting exoplanets from the CoRoT space mission ⋆⋆⋆

Astronomy & Astrophysics EDP Sciences 579 (2015) a36

Authors:

J Cabrera, Sz Csizmadia, G Montagnier, M Fridlund, M Ammler-von Eiff, S Chaintreuil, C Damiani, M Deleuil, S Ferraz-Mello, A Ferrigno, D Gandolfi, T Guillot, EW Guenther, A Hatzes, G Hébrard, P Klagyivik, H Parviainen, Th Pasternacki, M Pätzold, D Sebastian, M Tadeu dos Santos, G Wuchterl, S Aigrain, R Alonso, J-M Almenara, JD Armstrong, M Auvergne, A Baglin, P Barge, SCC Barros, AS Bonomo, P Bordé, F Bouchy, S Carpano, C Chaffey, HJ Deeg, RF Díaz, R Dvorak, A Erikson, S Grziwa, J Korth, H Lammer, C Lindsay, T Mazeh, C Moutou, A Ofir, M Ollivier, E Pallé, H Rauer, D Rouan, B Samuel, A Santerne, J Schneider
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A Gaussian process framework for modelling stellar activity signals in radial velocity data

(2015)

Authors:

Vinesh Rajpaul, Suzanne Aigrain, Michael A Osborne, Steven Reece, Stephen J Roberts
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Feedback temperature dependence determines the risk of high warming

Geophysical Research Letters Wiley 42:12 (2015) 4973-4980

Authors:

Jonah Bloch-Johnson, Raymond T Pierrehumbert, Dorian S Abbot

Abstract:

The long-term warming from an anthropogenic increase in atmospheric CO2 is often assumed to be proportional to the forcing associated with that increase. This paper examines this linear approximation using a zero-dimensional energy balance model with a temperature-dependent feedback, with parameter values drawn from physical arguments and general circulation models. For a positive feedback temperature dependence, warming increases Earth's sensitivity, while greater sensitivity makes Earth warm more. These effects can feed on each other, greatly amplifying warming. As a result, for reasonable values of feedback temperature dependence and preindustrial feedback, Earth can jump to a warmer state under only one or two CO2 doublings. The linear approximation breaks down in the long tail of high climate sensitivity commonly seen in observational studies. Understanding feedback temperature dependence is therefore essential for inferring the risk of high warming from modern observations. Studies that assume linearity likely underestimate the risk of high warming.
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