Results 61 to 70 of about 186,707 (292)

AS 314: A Massive Dusty Hypergiant or a Low-Mass Post-Asymptotic Giant Branch Object?

Galaxies
AS 314 (V452 Sct) is a poorly studied early-type emission-line star, which exhibits an infrared excess at wavelengths longer than 10 μm. Its earlier studies have been limited to small amounts of observational data and led to controversial conclusions ...
Aigerim Bakhytkyzy, Anatoly S. Miroshnichenko, Valentina G. Klochkova, Vladimir E. Panchuk, Sergey V. Zharikov, Laurent Mahy, Hans Van Winckel, Aldiyar T. Agishev, Serik A. Khokhlov   +8 more
doaj   +1 more source

Photometric Observations of Eccentric Accretion in Algol-type Binary Stars [PDF]

Journal of Astronomy and Space Sciences, 2012
Some Algol-type interacting binary stars exhibit strange photometric variations that can be phase-dependent and/or secular. This paper discusses the possibility of explaining these observed variations as resulting from an accretion structure eclipsing ...
Phillip A. Reed
doaj   +1 more source

The Pristine survey II: a sample of bright stars observed with FEROS

, 2017
Extremely metal-poor (EMP) stars are old objects formed in the first Gyr of the Universe. They are rare and, to select them, the most successful strategy has been to build on large and low-resolution spectroscopic surveys.
Aguado, D. S., Bonifacio, P., Caffau, E., Henden, A. A., Hernandez, J. I. Gonzalez, Jablonka, P., Martin, N., Prieto, C. Allende, Starkenburg, E., Venn, K., Youakim, K.   +10 more
core   +2 more sources

ALKBH3 m1A Demethylase Deficiency Reduces Alzheimer's Amyloid‐β Pathology

Advanced Science, EarlyView.
This study identifies that ALKBH3‐driven m1A demethylation orchestrates Alzheimer's disease progression by disrupting mitochondrial and synaptic homeostasis. This epitranscriptomic mechanism suppresses PINK1‐mediated mitophagy via m1A erasure, leading to mitochondrial dysfunction, oxidative stress, elevated Aβ production, and impaired microglial ...
Yueyang Li, Sifei Yu, Kaidong Lu, Yujie Zhang, Mingjie Dong, Yan Peng, Liang Xue, Waleed Alam, Yuxuan Shui, Yi Zhou, Wuyunhan Ma, Meng Bao, Peiming Li, Peiyi Luo, Tiezhan Lu, Jiajia Li, Kang Zhang, Yuying Wang, Shuchen Yang, Nuoya Yin, Francesco Faiola, Zilong Gao, Jingfeng Zhou, Fei Zhao, Yali He, Magdalena J. Koziol   +25 more
wiley   +1 more source

New Light Curves and Orbital Period Investigations of the Interacting Binary System UV Piscium

Journal of Astronomy and Space Sciences, 2019
UV Psc is a typical RS CVn type system undergoing dynamic chromosphere activity. We performed photometric observations of the system in 2015 and secured new BVR light curves showing well-defined photometric waves.
Min-Ji Jeong, Wonyong Han, Chun-Hwey Kim   +2 more
doaj   +1 more source

Light Curves and Roche Configurations of Near-Contact Binary AX Draconis [PDF]

Journal of Astronomy and Space Sciences, 2003
We completed the light curves of near-contact binary system AX Dra for 11 nights from March 2001 to May using the 61-cm reflector and VR filters at Sobaeksan Optical Astronomy Observatory.
Ho-Il Kim, Jae Woo Lee, Chun-Hwey Kim, Jae-Hyuk Yoon, Woo-Baik Lee   +4 more
doaj   +1 more source

The Recognition of Unusual Objects in the Sloan Digital Sky Survey Color System [PDF]

, 1998
We present 5 filter photometry of 21 carbon stars, 15 asteroids, 15 cataclysmic variables, 6 metal-poor stars, 5 Cepheids, 1775 field stars, blue horizontal branch (BHB) stars and RR Lyrae stars in the globular clusters M 15 and M 2, two primary ...
Berger J., Bruce  Margon, Kevin  Krisciunas, Newberg H., Paula  Szkody   +4 more
core   +3 more sources

mGluR5 in ECCCK to BLA Circuit Modulates Depressive‐Like Phenotypes through CCK Signaling

Advanced Science, EarlyView.
Dysregulation of mGluR5 and CCK signaling contributes to major depressive disorder, yet circuit‐level mechanisms remain unclear. Here, the ECCCK→BLA pathway is identified as a critical regulator of affective behavior. mGluR5 modulates synaptic function and CCK signaling within this circuit, controlling stress susceptibility and depressive‐like states ...
Muhammad Asim, Huajie Wang, Gao Qianqian, Abdul Waris, Jufang He   +4 more
wiley   +1 more source

Photometric Observations and Light Curve Analysis of BL Eridani [PDF]

Journal of Astronomy and Space Sciences, 2006
We present light curves of a short period binary system BL Eridani. The light curves were observed with {it VRI} filters by a 50cm wide field robotic telescope at Siding Spring Observatory (SSO), equipped with a 2K CCD camera, which was developed by ...
Wonyong Han, Hong-Suh Yim, Chung-Uk Lee, Jae-Hyuck Youn, Joh-Na Yoon, Ho-Il Kim, Hong-Kyu Moon, Yong-Ik Byun, Sunyoup Park   +8 more
doaj   +1 more source

A new survey of cool supergiants in the Magellanic Clouds [PDF]

, 2015
In this study, we conduct a pilot program aimed at the red supergiant population of the Magellanic Clouds. We intend to extend the current known sample to the unexplored low end of the brightness distribution of these stars, building a more ...
Dorda, Ricardo, González-Fernández, Carlos, Marco, Amparo, Negueruela, Ignacio   +3 more
core   +3 more sources