Results 121 to 130 of about 2,367 (264)

A Test of Spectroscopic Age Estimates of White Dwarfs Using Wide WD+WD Binaries

The Astrophysical Journal
White dwarf stars have been used for decades as precise and accurate age indicators. This work presents a test of the reliability of white dwarf total ages when spectroscopic observations are available. We conduct follow-up spectroscopy of 148 individual
Tyler M. Heintz, J. J. Hermes, P.-E. Tremblay, Lou Baya Ould Rouis, Joshua S. Reding, B. C. Kaiser, Jennifer L. van Saders   +6 more
doaj   +1 more source

Patterns and environmental drivers of root traits across hydrological gradients in old growth boreal forests

Oikos, EarlyView.
Many key ecosystem functions are affected by plant roots and their traits. However, understanding of the patterns in, and drivers of, root traits lags far behind equivalent knowledge of above‐ground tissues, particularly in boreal old growth forests. We surveyed community‐level root traits across 11 old growth forests spanning a wide latitudinal range ...
Naomi Vöhringer, Hanna Axén, Anders Ahlström, Gesche Blume‐Werry, Daniel B. Metcalfe   +4 more
wiley   +1 more source

Exploring consumer preferences for wild meat and other animal proteins in Gamba, Gabon: Implications for conservation and management of natural resources alongside extractive industry

People and Nature, EarlyView.
Abstract The town of Gamba in southwest Gabon represents an exceptional example of how the development of an extractive industry (in this case oil production) may impact wild meat consumption in an area of global importance for biodiversity. Studies in the 1990s identified an active wild meat trade; however, no studies have been undertaken since, and ...
James McNamara, Landry Tchignoumba, Gabriel Koumba, Ghislain Guissouegou, Anna Feistner   +4 more
wiley   +1 more source

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs

The Astrophysical Journal
Planets orbiting in the habitable zones of white dwarfs have recently been proposed as promising targets for biosignature searches. However, since the white dwarf habitable zone resides at 0.01–0.1 au, planets residing there are subject to tidal heating ...
Eva Stafne, Juliette Becker
doaj   +1 more source

Metal abundances in hot white dwarfs with signatures of a superionized wind. [PDF]

Astron Astrophys, 2018
Werner K, Rauch T, Kruk JW.
europepmc   +1 more source

Prenatal Phenotypic Features of Five Fetal Cases With RNU4ATAC‐Associated Microcephalic Osteodysplastic Primordial Dwarfism Type I

Prenatal Diagnosis, EarlyView.
ABSTRACT Objective To present the prenatal sonographic features, genomic findings, and pregnancy outcomes of fetuses with biallelic pathogenic RNU4ATAC variants linked to microcephalic osteodysplastic primordial dwarfism type I (MOPD1). Methods This retrospective case series includes five prenatal cases with MOPD1.
Alexandra Liebmann, Tanja Richter, Nevena Krstić, Markus Hoopmann, Karl Oliver Kagan, Lena‐Sophie Menig‐Benzig, Simone Olivieri, Olaf Riess, Andreas Dufke   +8 more
wiley   +1 more source

An All-sky Survey of White Dwarf Merger Remnants: Far-Ultraviolet Is the Key

The Astrophysical Journal
The majority of merging white dwarfs leave behind a white dwarf remnant. Hot/warm DQ white dwarfs with carbon-rich atmospheres have high masses and unusual kinematics. All evidence points to a merger origin.
Mukremin Kilic, Pierre Bergeron, Warren R. Brown, Simon Blouin, Gracyn Jewett, Adam Moss, Patrick Dufour, Olivier Vincent   +7 more
doaj   +1 more source

White Dwarfs in Cataclysmic Variables: An Update. [PDF]

Acta Polytech CTU Proc, 2015
Sion EM, Godon P.
europepmc   +1 more source

Sources of Strength for School‐Based Suicide Prevention: Key Implementation Strategies Based on School Professional Perspectives

Psychology in the Schools, EarlyView.
ABSTRACT As concerns for rising rates of youth suicide and suicidal thoughts and behaviors continue to grow, there is a need to prioritize school‐based suicide prevention programs. Despite evidence documenting the effectiveness of school‐based prevention programs for reducing suicide‐related risk in adolescents, schools face numerous barriers to ...
Marisa E. Marraccini, Maya Gutman, Layne A. Wetherbee, Jessica R. Jacobs, Donald Christian Fisher, Dorothy L. Espelage, Sarah Haley McGlothin, Denise Yookong Williams, Paul Lanier   +8 more
wiley   +1 more source

Modeled Subsidence of Permafrost Terrain 2025–2050: North‐Central Alaska

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT A large fraction of the Alaska terrain is underlain by regolith that contains excess ice (ice that in volume exceeds the natural pore space). Possible loss of excess ice would lead to ground subsidence, which in turn would disturb and destabilize the ground surface.
Jaakko Putkonen, Hayden Patterson, Robert Chance, Mary Soaper, Anai Caparó Bellido, Aymane Ahajjam, Andrew Wilcox, Sheridan Parker, Timothy Pasch   +8 more
wiley   +1 more source