Results 101 to 110 of about 3,384 (302)

Identification of New Be Stars from LAMOST Data Release 11 Based on Deep Learning

The Astrophysical Journal Supplement Series
Be stars are rapidly rotating B-type stars that exhibit Balmer emission lines in their optical spectra, which makes them crucial for studying stellar evolution and circumstellar disk structures.
Lei Tan, Hui Deng, Tianhang Liu, Huanbin Chi, Yixing Chen, Ying Mei, Feng Wang   +6 more
doaj   +1 more source

Solar photospheric spectrum microvariability

Astronomy & Astrophysics
Context. Finding low-mass planets around solar-type stars requires understanding the physical variability of the host star, which greatly exceeds the planet-induced radial-velocity modulation.
Dravins Dainis, Ludwig Hans-Günter, Steffen Matthias, Allende Prieto Carlos, Koesterke Lars   +4 more
doaj   +1 more source

Surface effects in solar-like oscillators

EPJ Web of Conferences, 2017
Inaccurate modelling of the near-surface layers of solar models causes a systematic difference between modelled and observed solar mode frequencies. This difference—known as the “surface effect” or “surface term”—presumably also exists in other solar ...
Ball Warrick H.
doaj   +1 more source

Loss of proton‐sensing TDAG8 increases tumor progression in mouse models of colon cancer

Molecular Oncology, EarlyView.
Loss of the pH‐sensing receptor TDAG8 accelerates colorectal cancer progression in mice. Animals lacking TDAG8 expression had increased tumor growth, DNA damage, and recruitment of tumor‐associated immune cells, including macrophages, neutrophils, and monocytes.
Ermanno Malagola, Yasmine Illi, Anna Bircher, Marijn Wilmink, Rachele F. Malagutti, Solenn Ottié, Cordelia Schuler, Pedro A. Ruiz, Cheryl de Vallière, Klaus Seuwen, Gerhard Rogler, Martin Hausmann   +11 more
wiley   +1 more source

The Spitzer Atlas of Stellar Spectra (SASS) [PDF]

, 2009
We present the Spitzer Atlas of Stellar Spectra, which includes 159 stellar spectra (5-32 μm; R ~ 100) taken with the Infrared Spectrograph on the Spitzer Space Telescope.
J. Rho, Wojciech Makowiecki, Rho, Jeonghee, J. Stauffer, Hoard, D. W., Sergio Fajardo-Acosta, Stefanie Wachter, John Stauffer, Jeonghee Rho, I. Song, David R. Ardila, Ardila, David R., S. Wachter, Fajardo-Acosta, Sergio, W. Makowiecki, S. Fajardo-Acosta, Schuyler D. Van Dyk, Inseok Song, S. van Dyk, D. W. Hoard, Song, Inseok, Wachter, Stefanie, Makowiecki, Wojciech, Van Dyk, Schuyler D., Stauffer, John   +24 more
core   +1 more source

Epigenetic heterogeneity and plasticity in therapy‐induced tumor states through single‐cell multi‐omics

Molecular Oncology, EarlyView.
Single‐cell multi‐omics reveals epigenetic heterogeneity across therapy‐adaptive tumor states, including quiescent/dormant, drug‐tolerant persister, and EMT‐like phenotypes. By linking regulatory features with state‐associated biomarkers, these approaches inform biomarker‐guided therapeutic strategies for evolving tumors.
Hee Jung Kim, Hwiyeong Lee, Jin Hong, Daechan Park   +3 more
wiley   +1 more source

The California Legacy Survey. V. Chromospheric Activity Cycles in Main-sequence Stars

The Astrophysical Journal Supplement Series
We present optical spectroscopy of 710 solar neighborhood stars collected over 20 years to catalog chromospheric activity and search for stellar activity cycles.
Howard Isaacson, Andrew W. Howard, Benjamin Fulton, Erik A. Petigura, Lauren M. Weiss, Stephen R. Kane, Brad Carter, Corey Beard, Steven Giacalone, Judah Van Zandt, Joseph M. Akana Murphy, Fei Dai, Ashley Chontos, Alex S. Polanski, Malena Rice, Jack Lubin, Casey Brinkman, Ryan A. Rubenzahl, Sarah Blunt, Samuel W. Yee, Mason G. MacDougall, Paul A. Dalba, Dakotah Tyler, Aida Behmard, Isabel Angelo, Daria Pidhorodetska, Andrew W. Mayo, Rae Holcomb, Emma V. Turtelboom, Michelle L. Hill, Luke G. Bouma, Jingwen Zhang, Ian J. M. Crossfield, Nicholas Saunders   +33 more
doaj   +1 more source

PAK1 activation drives divergent resistance mechanisms to aromatase inhibition and tamoxifen in a luminal: A breast cancer model

Molecular Oncology, EarlyView.
Breast cancer remains a major cause of cancer death in women, frequently developing endocrine therapy resistance. This study demonstrates that upregulated p21‐activated kinase 1 (PAK1) activity drives resistance to tamoxifen and long‐term estrogen deprivation in ER+ breast cancer models.
Luisa Schwarzmüller, Janina Müller, Efstathios‐Iason Vlachavas, Lukas Beumers, Lena Fleischhacker, Sara Burmester, Angelika Wörner, Sabine Karolus, Dominic Helm, Cindy Körner, Stefan Wiemann   +10 more
wiley   +1 more source

The Stellar Content of the Young Cluster in M 17

, 2003
We present preliminary results of a multicolour BVRI and JHK imaging study of the young cluster in M 17. Colour--colour-diagrams of the form V - λ vs. B - V corroborate previous results about an abnormal extinction law in that region.
Scheyda C M, Chini R, Hoffmeister V H, Manthey E, Schmidthuisen O, Testi L, Brown D, Krügel E, Kürster M   +8 more
core  

Magnesium isotopic detection in cool stars: Tracing nucleosynthetic signatures from MgH features

Astronomy & Astrophysics
Context. Magnesium isotopic ratios offer valuable insights into stellar nucleosynthesis and Galactic chemical evolution, particularly in distinguishing between contributions from supernovae and asymptotic giant branch (AGB) stars.
Aicken Davies Q., Worley C. C.
doaj   +1 more source