Results 41 to 50 of about 5,855,365 (255)

ASPCAP: THE APOGEE STELLAR PARAMETER AND CHEMICAL ABUNDANCES PIPELINE [PDF]

, 2016
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has built the largest moderately highresolution (R≈22,500) spectroscopic map of the stars across the Milky Way, and including dust-obscured areas.
Cunha, Katia, Zamora, O, Frinchaboy, Peter M., Meszaros, S, Shetrone, Matthew, Zasowski, Gail, Johnson, Jennifer A., Schiavon, RP, Troup, N, Bovy, J, Frinchaboy, PM, Schiavon, Ricardo P., Holtzman, JA, Feuillet, Diane, Smith, VV, Eisenstein, DJ, Zamora, Olga, Bizyaev, Dmitry, Nidever, DL, Smith, Verne V., Weinberg, DH, Garcia Perez, AE, Bovy, Jo, Nguyen, DC, Wilson, JC, Holtzman, J., Prieto, Carlos Allende, Nguyen, Duy C., Nidever, David L., Mészáros, Szabolcs, Perez, AEG, García Pérez, Ana E., Weinberg, David H., Bizyaev, D, Johnson, JA, Hayden, MR, Prieto, CA, Shane, Neville, Hayden, Michael R., Majewski, Steven R., O'Connell, RW, Pinsonneault, MH, Hearty, Fred R., Garcia-Hernandez, DA, Allende Prieto, C, Sobeck, Jennifer, Cunha, K, O’Connell, Robert W., Zasowski, G, García-Hernández, D. A., Eisenstein, Daniel J., Shetrone, M, Garcia Perez, Ana, Troup, N., Wilson, John C., Majewski, SR, Carrera, R, Pinsonneault, Marc, Carrera, Ricardo, Shane, N, Feuillet, D, Hearty, FR, Sobeck, J, Holtzman, J. A., Prieto, C. A., Perez, A. E. G., Shetrone, M.   +66 more
core   +1 more source

Chemical Cartography with APOGEE: Two-process Parameters and Residual Abundances for 288,789 Stars from Data Release 17

The Astrophysical Journal
Stellar abundance measurements are subject to systematic errors that induce extra scatter and artificial correlations in elemental abundance patterns. We derive empirical calibration offsets to remove systematic trends with surface gravity $\mathrm{log ...
Tawny Sit, David H. Weinberg, Adam Wheeler, Christian R. Hayes, Sten Hasselquist, Thomas Masseron, Jennifer Sobeck   +6 more
doaj   +1 more source

Autophagy and mitophagy in pancreatic β‐cell homeostasis and their involvement in diabetes pathophysiology

FEBS Letters, EarlyView.
This review focuses on the role of autophagy and mitophagy in maintaining pancreatic β‐cell function and homeostasis. We discuss how genetic defects affecting these pathways contribute to the development of type 1, type 2, monogenic, and gestational diabetes. We further explore their potential as therapeutic targets. Created in BioRender.
Yunkyeong Lee, Mingming Tong, Anna L. Gloyn   +2 more
wiley   +1 more source

Two-process Model and Residual Abundance Analysis of the Milky Way Massive Satellites

The Astrophysical Journal
The “two-process model” is a promising technique for interpreting stellar chemical abundance data from large-scale surveys (e.g., the Sloan Digital Sky Survey IV/V and the Galactic Archeology with HERMES survey), enabling more quantitative empirical ...
Sten Hasselquist, Christian R. Hayes, Emily J. Griffith, David Weinberg, Tawny Sit, Rachael L. Beaton, Danny Horta   +6 more
doaj   +1 more source

The ¹⁷O/¹⁸O Ratio of Post-AGB Sources: Canonical and Non-Canonical Populations

Galaxies
Stellar evolution models serve as tools to derive stellar parameters from elemental and isotopic abundance ratios. For low-to-intermediate mass evolved stars, C/O, 12C/13C, and 17O/18O ratios are proxies of the initial mass, a largely unknown parameter ...
Javier Alcolea, Elisa Masa, Theo Khouri, Miguel Santander-García, Iván Gallardo Cava, Hans Olofsson, Carmen Sánchez Contreras, Valentín Bujarrabal, Wouter H. T. Vlemmings, Daniel Tafoya   +9 more
doaj   +1 more source

Partial depletion of plasminogen activator inhibitor‐1 decreases subcutaneous fat cell hypertrophy and liver cholesterol in high‐fat‐fed female mice

FEBS Letters, EarlyView.
Obesity raises blood levels of PAI‐1, a protein linked to metabolic dysfunction‐associated steatotic liver disease in people with obesity. In female mice fed a high‐fat diet, partially lowering PAI‐1 led to smaller subcutaneous fat cells and lower liver cholesterol, without changing body weight or insulin sensitivity.
Claudia E. Ramirez Bustamante, Robert Sharp, Pradip K. Saha, Elizabeth S. Anaya, Elizabeth L. Lieu, Evelyn L. de Groot, Pooja Patel, Mi Jeong Heo, Aaron R. Cox, Kang Ho Kim, Sean M. Hartig   +10 more
wiley   +1 more source

Beyond the Iron Peak: r- and s-Process Elemental Abundances in Stars with Planets

, 2008
We present elemental abundances of 118 stars (28 of which are known extrasolar planetary host stars) observed as part of the Anglo-Australian Planet Search.
Bond, J. C., Tinney, C. G., Marcy, G. W., Butler, R. P., Jones, H. R. A., O'Toole, S. J., Lauretta, D. S., Carter, B. D., Bailey, J.   +8 more
core   +1 more source

Metallicities from High-resolution TRES Spectra with uberMS: Performance Benchmarks and Literature Comparison

The Astrophysical Journal Supplement Series
As the field of exoplanetary astronomy has matured, demand has grown for precise stellar abundances to probe subtle correlations between stellar compositions and planetary demographics.
Emily K. Pass, Phillip A. Cargile, Victoria DiTomasso, Romy Rodríguez Martínez, David Charbonneau, David W. Latham, Andrew Vanderburg, Allyson Bieryla, Samuel N. Quinn, Lars A. Buchhave   +9 more
doaj   +1 more source

Optical Spectroscopy and Photoionization Model of Planetary Nebula NGC 6572

Journal of Mathematical and Fundamental Sciences
We investigated NGC 6572 through optical spectroscopy to determine its kinematical and chemical properties. Two intermediate dispersion spectra (R~5000) centered around Hα and Hβ were used to derive the nebular expansion velocity from emission lines ...
Muhammad Fajrin, Hakim Luthfi Malasan, Evan Irawan Akbar   +2 more
doaj   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

FEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri, Ayaka Nagasato‐Ichikawa, Keita Iida, Shuhei Kimura, Akira Imamoto, Mariko Okada   +5 more
wiley   +1 more source