Results 121 to 130 of about 3,405,157 (289)

The Local Stellar Initial Mass Function

, 2000
This contribution describes the difficult task of inferring the IMF from local star-count data, by discussing the mass-luminosity relation, unresolved binary, triple and quadruple systems, abundance and age spreads and Galactic structure, all of which must be accounted for properly for the results to be meaningful.
openaire   +2 more sources

A Preferential Attachment Model for the Stellar Initial Mass Function

, 2019
Accurate specification of a likelihood function is becoming increasingly difficult in many inference problems in astronomy. As sample sizes resulting from astronomical surveys continue to grow, deficiencies in the likelihood function lead to larger ...
Cisewski-Kehe, Jessi, Schafer, Chad, Weller, Grant   +2 more
core   +1 more source

Keratin 19 as a prognostic marker and contributing factor of metastasis and chemoresistance in high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
Keratin 19 (KRT19) is overexpressed in high‐grade serous ovarian cancer with high levels of Kallikrein‐related peptidases (KLK) 4–7 and is associated with poor survival. In vivo analyses demonstrate that elevated KRT19 increases peritoneal tumour burden.
Sophia Bielesch, Isabel Vogel, Sina Nokodian, Johanna Moeller, Antonia Blechschmidt, Vicky Hecht, Vanessa Kuentzel, Katharina Thiedig, Melissa Schwab, Oliver Schilling, Holger Bronger, Marion Kiechle, Viktor Magdolen, Tobias Dreyer   +13 more
wiley   +1 more source

Tails of Gravity: Persistence of Star Formation in the Central Molecular Zone

The Astrophysical Journal
We characterize star-forming gas in six molecular clouds (Sgr B1-off, Sgr B2, Sgr C, the 20 and 50 km s ^−1 molecular clouds, and the Brick) in the Galactic central molecular zone (CMZ), and compare their star-forming activities with those in molecular ...
Linjing Feng, Sihan Jiao, Fengwei Xu, Hauyu Baobab Liu, Xing Lu, Neal J. Evans II, Elisabeth A.C. Mills, Attila Kovács, Qizhou Zhang, Yuxin Lin, Jingwen Wu, Chao-Wei Tsai, Di Li, Zhi-Yu Zhang, Zhiqiang Yan, Hao Ruan, Fangyuan Deng, Yuanzhen Xiong, Ruofei Zhang   +18 more
doaj   +1 more source

The Origin and Universality of the Stellar Initial Mass Function

, 2014
We review current theories for the origin of the Stellar Initial Mass Function (IMF) with particular focus on the extent to which the IMF can be considered universal across various environments.
Bastian, Nathan, Bate, Matthew R., Clark, Paul C., Hennebelle, Patrick, Hopkins, Philip F., Moraux, Estelle, Offner, Stella S. R., Whitworth, Anthony P.   +7 more
core   +1 more source

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source

Simulating Brown Dwarf Observations for Various Mass Functions, Birthrates, and Low-mass Cutoffs

The Astrophysical Journal
After decades of brown dwarf discovery and follow-up, we can now infer the functional form of the mass distribution within 20 pc, which serves as a constraint on star formation theory at the lowest masses.
Yadukrishna Raghu, J. Davy Kirkpatrick, Federico Marocco, Christopher R. Gelino, Daniella C. Bardalez Gagliuffi, Jacqueline K. Faherty, Steven D. Schurr, Adam C. Schneider, Aaron M. Meisner, Marc J. Kuchner, Hunter Brooks, Jake Grigorian, The Backyard Worlds: Planet 9 Collaboration   +12 more
doaj   +1 more source

The Role of Magnetic Fields in Setting the Star Formation Rate and the Initial Mass Function

Frontiers in Astronomy and Space Sciences, 2019
Star-forming gas clouds are strongly magnetized, and their ionization fractions are high enough to place them close to the regime of ideal magnetohydrodyamics on all but the smallest size scales.
Mark R. Krumholz, Mark R. Krumholz, Christoph Federrath, Christoph Federrath   +3 more
doaj   +1 more source

Understanding the Stellar Initial Mass Function

, 2006
The essential features of the stellar Initial Mass Function are, rather generally, (1) a peak at a mass of a few tenths of a solar mass, and (2) a power-law tail toward higher masses that is similar to the original Salpeter function. Recent work suggests that the IMF peak reflects a preferred scale of fragmentation associated with the transition from a
openaire   +2 more sources

Hands‐on protocol for preparing water‐soluble fractions from agri‐food samples for NMR‐based metabolomics analysis

FEBS Open Bio, EarlyView.
This research protocol outlines a workflow for nuclear magnetic resonance (NMR)‐based metabolomics in the agri‐food sector. Using two case studies—strawberry leaves (solid matrix) and wine (liquid matrix)—it details the procedures for sample preparation, data acquisition, and processing.
Andrea Fernández‐Veloso, Jaime Hiniesta‐Valero, Alejandra Guerra‐Castellano, Miguel A. De la Rosa, Irene Díaz‐Moreno   +4 more
wiley   +1 more source