Results 71 to 80 of about 1,181,517 (291)

SPITZER OBSERVATIONS CONFIRM AND RESCUE THE HABITABLE-ZONE SUPER-EARTH K2-18b FOR FUTURE CHARACTERIZATION [PDF]

, 2017
The recent detections of two transit events attributed to the super-Earth candidate K2-18b have provided the unprecedented prospect of spectroscopically studying a habitable-zone planet outside the solar system. Orbiting a nearby M2.5 dwarf and receiving
Livingston, John, Krick, Jessica, Schlieder, Joshua E., Akeson, Rachel L., Petigura, Erik, Christiansen, Jessie, Ciardi, David R., Knutson, Heather, Howard, Andrew W., Gorjian, Varoujan, Dressing, Courtney, Crossfield, Ian J. M., Werner, Michael, Benneke, Björn, Beichman, Charles, Sinukoff, Evan   +15 more
core   +1 more source

Incomplete climate‐driven peripatric speciation in Moehringia sect. Moehringia (Caryophyllaceae) in the European Alps

American Journal of Botany, EarlyView.
Abstract Premise The origin of endemic species in the European Alps is commonly attributed to the climatic oscillations of the Quaternary. Moehringia sect. Moehringia, with 12 of 15 species endemic to the Alps and mostly restricted to well‐known glacial refugia, is a prime system for investigating the diversification of a lineage originating in the ...
Joachim W. Kadereit, Kirra McLeod, Audie M. Putra, Gudrun Kadereit, Diego F. Morales‐Briones   +4 more
wiley   +1 more source

Humidity and temperature interact in breaking physical dormancy in Fabaceae seeds from the Brazilian semiarid region

American Journal of Botany, EarlyView.
Abstract Premise In semiarid ecosystems such as the Brazilian Caatinga, physical seed dormancy (PY) is critical for plant persistence when water is unpredictable, but how soil moisture and temperature regulate PY release and seed longevity in species of native Fabaceae that have different growth forms is unknown. Methods Seeds of the herbaceous species
Humberto Araújo Almeida, Jessyca Adelle Silva Santos, Queila Souza Garcia   +2 more
wiley   +1 more source

Planetary Habitability Under the Light of a Rapidly Changing Star

The Astronomical Journal
Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates. In this work, we evaluate how stellar variability influences the equilibrium
Tara Fetherolf, Sadie G. Welter, Colby M. Ostberg, Stephen R. Kane, Rory Barnes, Emilie R. Simpson   +5 more
doaj   +1 more source

Negotiating contested spaces and places: Narratives of social suffering and resistance in racialized Cape Town communities

American Journal of Community Psychology, EarlyView.
Abstract This study employs a schizocartographic approach to explore community narratives of space, memory, and violence in Kraaifontein, Cape Town. Through participants' accounts, ordinary places—gardens, shops, blocks, sports grounds, and streets—emerge as ambivalent geographies where trauma, resilience, and belonging intersect.
Guido Veronese, Chiara Fiscone, Ashraf Kagee   +2 more
wiley   +1 more source

Tides Tighten the Hycean Habitable Zone

The Astrophysical Journal Letters
Hycean planets—exoplanets with substantial water ice layers, deep surface oceans, and hydrogen-rich atmospheres—are thought to be favorable environments for life. Due to a relative paucity of atmospheric greenhouse gases, hycean planets have been thought
Joseph R. Livesey, Juliette Becker, Susanna L. Widicus Weaver   +2 more
doaj   +1 more source

Discovery and validation of Kepler-452b:a 1.6 R_⊕ super earth exoplanet in the habitable zone of a G2 star

, 2015
We report on the discovery and validation of Kepler-452b, a transiting planet identified by a search through the 4 years of data collected by NASA's Kepler Mission. This possibly rocky planet orbits its G2 host star every days, the longest orbital period
Ramirez, Ivan, Buchhave, Lars, Borucki, William J., Gilliland, Ronald L., Jenkins, Jon M., Latham, David W., Marcy, Geoffrey W., Petigura, Erik, Endl, Michael, Ciardi, David R., Batalha, Natalie M., Esquerdo, Gilbert A., Tenenbaum, Peter, Sanderfer, Dwight, Rowe, Jason F., Cochran, William D., Bieryla, Allyson, Isaacson, Howard, Bryson, Stephen T., Henze, Christopher E., Wolfgang, Angie, Huber, Daniel, Caldwell, Douglas A., Twicken, Joseph D., Seader, Shawn, Li, Jie, Buchhave, Lars A., Campbell, Jennifer R., Catanzarite, Joseph H., Torres, Guillermo   +29 more
core   +1 more source

Definition and Characterization of the Habitable Zone

, 2017
International audienceWe review the concept of habitable zone (HZ), why it is useful, and how to characterize it. The HZ could be nicknamed the "Hunting Zone" because its primary objective is now to help astronomers plan observations.
Forget, F., Leconte, J., Turbet, M., Selsis, Franck   +3 more
core   +3 more sources

55 Cancri: Stellar Astrophysical Parameters, a Planet in the Habitable Zone, and Implications for the Radius of a Transiting Super-Earth [PDF]

, 2011
International audienceThe bright star 55 Cancri is known to host five planets, including a transiting super-Earth. The study presented here yields directly determined values for 55 Cnc's stellar astrophysical parameters based on improved interferometry: $
Kane, Stephen R., Sturmann, Laszlo, Stephen T. Ridgway, Goldfinger, P. J., Raymond, Sean N., Theo A. ten Brummelaar, Brummelaar, Theo A. Ten, Ciardi, David R., Mercedes López-Morales, Kaspar von Braun, Stephen R. Kane, Ridgway, Stephen T., Gail Schaefer, Boyajian, Tabetha S., Lopez-Morales, Mercedes, Nils H. Turner, von Braun, Kaspar, Mcalister, Harold A., Chris Farrington, Harold A. McAlister, Russel White, Lόpez-Morales, Mercedes, S. Boyajian Tabetha, Sturmann, Judit, Sean N. Raymond, ten Brummelaar, Theo A., White, Russel, Schaefer, Gail, Laszlo Sturmann, Judit Sturmann, Gerard T. van Belle, P. J. Goldfinger, Turner, Nils H., Farrington, Chris, van Belle, Gerard T., David R. Ciardi   +35 more
core   +1 more source

Diagnosing the system: Mental health, necropolitical uncare, and the abolition of migration detention

American Journal of Community Psychology, EarlyView.
Abstract This article examines the psychological effects of migration detention in the European Union's Closed Controlled Access Center (CCAC) on Samos through an ecological lens. It explores a double normalization of suffering: the brutalization of necropolitical migration governance and the simultaneous understanding of resulting distress as an ...
Julia Manek
wiley   +1 more source