Results 111 to 120 of about 11,541,392 (252)

Probing the Initial Mass Function in the Early Universe: Direct Measurements in the Boötes I Ultrafaint Dwarf Galaxy with JWST/NIRCam

The Astrophysical Journal
The dependence of the stellar initial mass function (IMF) on star formation environment, particularly at low metallicities and high redshifts, remains poorly constrained.
Keyi Ding, Mario Gennaro, Roberto J. Avila, Massimo Ricotti, Rachael L. Beaton, Martha L. Boyer, Thomas M. Brown, Annalisa Calamida, Santi Cassisi, Vedant Chandra, Roger E. Cohen, Matteo Correnti, Denija Crnojević, Kareem El-Badry, Marla Geha, Puragra Guhathakurta, Nitya Kallivayalil, Evan N. Kirby, Kristen. B. W. McQuinn, Alessandro Savino, Cheyanne Shariat, Joshua D. Simon, Daniel R. Weisz   +22 more
doaj   +1 more source

Extracellular vesicle lipidomics liquid biopsy reveals systemic and tumor microenvironment metabolic reprogramming in ovarian cancer

Molecular Oncology, EarlyView.
Extracellular vesicle (EV) lipidomic profiling of plasma and ascites from patients with high‐grade serous ovarian cancer and of ovarian cancer cell lines reveals enrichment of triglycerides (TGs), diacylglycerols (DGs), phosphatidylcholine (PCs), sphingomyelins (SMs), reflecting tumor metabolic reprogramming.
Shikha Rani, Dominic Guanzon, Andrew Lai, Katherin Scholz‐Romero, Sarah Reed, Edita Ritmejeryte, Rohan Lourie, Naven Chetty, Kaltin Ferguson, Carlos Salomon   +9 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

Investigating the Low-Mass Stellar Initial Mass Function in Draco

, 2016
University of Minnesota M.S. thesis. May 2016. Major: Astrophysics. Advisors: Evan Skillman, Dan Weisz. 1 computer file (PDF); vii, 41 pages.We present new analysis of the low-mass stellar initial mass function ($\sim0.4-0.8M_\odot$) in the Local Group ...
Sotoudeh, Seyed Soroush
core  

Initial mass function of planetesimals formed by the streaming instability

, 2017
The streaming instability is a mechanism to concentrate solid particles into overdense filaments that undergo gravitational collapse and form planetesimals.
Schäfer, Urs,, Johansen, Anders,, Yang, Chao Chin, Lund University.   +3 more
core   +1 more source

p190A/ARHGAP35 and p190B/ARHGAP5 proteins in endometrial cancer: a novel cancer‐relevant paralog interplay

Molecular Oncology, EarlyView.
This study identifies ARHGAP5, in addition to the frequently mutated ARHGAP35, as significantly mutated in endometrial cancer. Mutations in both genes co‐occur and are associated with their correlated downregulation. Functional CRISPR studies show that both paralogs regulate similar pathways, including actin cytoskeleton organization.
Mathilde Pinault, Capucine Heraud, Mélissa Correia de Oliveira, Véronique Neaud, Valérie Valesco, Valérie Prouzet‐Mauleon, Béatrice Turcq, Jean‐William Dupuy, Anne‐Aurélie Raymond, Sabrina Croce, Frédéric Saltel, Valérie Lagrée, Violaine Moreau   +12 more
wiley   +1 more source

The Sc, Ti, and V Abundance Discrepancy: Testing High-mass Initial Mass Function Variation and Massive-star Rotation

The Astrophysical Journal
Scandium, titanium, and vanadium can be synthesized primarily in massive stars. Yet many of the current Galactic chemical evolution (GCE) models underproduce these elements at early epochs.
Soonchul Choi, Eda Gjergo, Youngman Kim, Toshitaka Kajino   +3 more
doaj   +1 more source

The Luminosity Function and Initial Mass Function in the Galactic Bulge [PDF]

, 1998
We present deep photometry obtained with the Hubble Space Telescope in a field in Baade's window in the Galactic bulge. We derive a luminosity function down to I ~ 24.3, or V ~ 27.5, corresponding to M ~ 0.3 M_☉.
Light, Robert M., O'Neil, Earl J., Jr., Baum, William A., Lynds, Roger, Holtzman, Jon A., Watson, Alan M., Grillmair, Carl J., Groth, Edward J.   +7 more
core  

Extracellular matrix remodeling and immune reprogramming drive residual tumor progression of liver cancer after incomplete microwave ablation

Molecular Oncology, EarlyView.
Incomplete microwave ablation (iMWA) of liver cancer triggers a biphasic progression in residual tumors. At Day 3, the microenvironment is characterized by acute inflammatory responses and extracellular matrix (ECM) remodeling. By Day 14, a profound shift occurs toward oncogenic signal transduction and immunosuppression, marked by macrophage ...
Yu Liu, Yubei He, Nikolaus Berndt, Michael Mülleder, Kathrin Textoris‐Taube, Jing Guo, Matthias Stechele, Justus Ramtke, Shraga Nahum Goldberg, Lynn Jeanette Savic   +9 more
wiley   +1 more source

The Present-day Mass Function of Star Clusters in the Solar Neighborhood

The Astrophysical Journal
This work analyzes the present-day mass function (PDMF) of 93 star clusters utilizing Gaia Data Release 3 data, with membership determined by the StarGo machine-learning algorithm.
Xiaoying Pang, Siqi Liao, Jiadong Li, Zhiqiang Yan, Mingjie Jian, M. B. N. Kouwenhoven, Shih-Yun Tang, Yifan Wang   +7 more
doaj   +1 more source