Nanoclimate environment of cyanobacterial communities in China s hot and cold hyperarid deserts

Published in Journal of Geophysical Research Space Physics

Improved age constraints for the AB Doradus quadruple system-The binary nature of AB Doradus B

Published in ScienceOpen Astronomy & Astrophysics

We present resolved NACO photometry of the close binary AB Dor B in H-and Ks- band. AB Dor B is itself known to be a wide binary companion to AB Dor A, which in turn has a very low-mass close companion named AB Dor C. These four known components make up the young and dynamically interesting system AB Dor, which will likely become a benchmark system...

Characterization of alteration products in tephra from Haleakala, Maui: A visible-infrared spectroscopy, Mössbauer spect...

Published in Clays and Clay Minerals

Altered basaltic tephra from Haleakala, Maui, are characterized using multiple techniques in order to identify the minerals formed under a variety of conditions and to understand the soil formation processes here. We collected samples that are representative of typical bulk weathered material in the crater, as well as solfataric alteration in a hyd...

Interplanetary transfer of photosynthesis: an experimental demonstration of a selective dispersal filter in planetary is...

Published in Astrobiology

We launched a cryptoendolithic habitat, made of a gneissic impactite inoculated with Chroococcidiopsis sp., into Earth orbit. After orbiting the Earth for 16 days, the rock entered the Earth's atmosphere and was recovered in Kazakhstan. The heat of entry ablated and heated the rock to a temperature well above the upper temperature limit for life to...

Rock glaciers on Mars: Earth-based clues to Mars’ recent paleoclimatic history

Published in Planetary and Space Science

The Mars Orbital Camera onboard the Mars Global Surveyor spacecraft, which is currently orbiting about Mars, has revealed hundreds of pristine lobate and tongue-shaped flows that closely display the morphological characteristics of terrestrial rock glaciers, both tongue-and lobe-shaped forms. Generally located between 30° S and 47° S latitude on Ma...

Possible Resonances with Saturn's Rotation in the Rings

Published in AGU Fall Meeting Abstracts

Images from the Cassini spacecraft reveal several unexpected structures in Saturn s faint rings that could be caused by irregularities in the planet s interior and/or magnetosphere. Images of the D ring from 2006 and early 2007 show structures between 71,000 and 73,000 km from Saturn s center that each have mode-2 rotational symmetry around the pla...

The abundance of carbon dioxide ice in the quiescent intracloud medium

Published in The Astrophysical Journal

We present new observations with the Infrared Spectrograph on board the Spitzer Space Telescope of the solid-CO 2 absorption feature near 15 μm in the spectra of eight field stars behind the Taurus complex of dark clouds. Solid CO 2 is detected in six lines of sight. New results are combined with previous data to investigate the correlation of CO 2...

Magnetic optimization in a multicellular magnetotactic organism.

Published in Biophysical journal

Unicellular magnetotactic prokaryotes, which typically carry a natural remanent magnetic moment equal to the saturation magnetic moment, are the prime example of magnetically optimized organisms. We here report magnetic measurements on a multicellular magnetotactic prokaryote (MMP) consisting of 17 undifferentiated cells (mean from 148 MMPs) with c...