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Spotted eclipsing binary KIC 7023917 with δ-Scuti pulsations
Parimucha, Š.; Gajdoš, P.; Kamenec, M.
Eclipsing binary KIC 7023917 is one of nearly three thousand other binaries in the well-known Kepler Eclipsing Binary Catalog. However, it has some uncommon features. We focused on this system because we detected fast anti-correlated changes on the O-C diagram which could suggest the presence of apsidal motion. However, these changes are very fast…
Investigation of three events of solar parameters and Interplanetary Coronal Mass ejections during the maximum phase of solar cycle 24
Dhaiya, M. S.; Bidhu, S. S.; Sobia, A. Iren
This paper analyzes the Three events of Solar Parameters and Interplanetary Coronal Mass Ejections in the maximum phase of Solar Cycle 24 and focuses on the magnetic activity of interplanetary coronal mass ejection during the solar cycle 24. We investigate the magnetic field magnitude (B), Proton temperature (Tp), Proton density (Np). From this st…
X-ray Observations of the Very-Faint X-ray Transient XMMSL1 J171900.4-353217: A New Candidate Neutron Star Low-Mass X-ray Binary
Degenaar, N.; Wijnands, R.; Armas Padilla, M. +1 more
XMMSL1 J171900.4–353217 is a very-faint X-ray transient that was discovered in 2010 March when it exhibited an outburst. We report on 7 observations, obtained with the X-Ray Telescope (XRT) aboard the Neil Gehrels Swift Observatory between 2010 May and October. By fitting a single absorbed power-law model to the XRT spectra, we infer power-law ind…
Extreme-emission-line galaxies in the MUSE Hubble Ultra Deep Field Survey
Vílchez, J. M.; Iglesias-Páramo, J.; Arroyo-Polonio, A. +1 more
Aims: We aim to apply a methodology to build a sample of extreme-emission-line galaxies (EELGs) using integral field spectroscopy data. In this work, we followed the spectroscopic criteria corresponding to EELG selection and used the MUSE Hubble Ultra-Deep Field Survey, which includes the deepest spectroscopic survey ever performed.
Meth…
Prediction of Geoeffective CMEs Using SOHO Images and Deep Learning
Jing, Ju; Wang, Haimin; Yurchyshyn, Vasyl +6 more
The application of machine learning to the study of coronal mass ejections (CMEs) and their impacts on Earth has seen significant growth recently. Understanding and forecasting CME geoeffectiveness are crucial for protecting infrastructure in space and ensuring the resilience of technological systems on Earth. Here we present GeoCME, a deep-learni…
Double-edged Sword: The Influence of Tidal Interaction on Stellar Activity in Binaries
Fang, Min; Wang, Song; Han, Henggeng +4 more
Using the LAMOST DR7 low-resolution spectra, we carried out a systematic study of stellar chromospheric activity in both single and binary stars. We constructed a binary sample and a single-star sample, mainly using the binary belt and the main sequence in the Hertzsprung–Russell diagram, respectively. By comparing the S indices between single and…
SOHO SWAN Lyα Models Supporting LRO LAMP: 2008–2023
Pryor, Wayne R.; Gladstone, G. Randall; Quémerais, Eric +5 more
The Lunar Reconnaissance Orbiter Lyman-Alpha Mapping Project (LAMP) has been mapping the Moon since its launch in 2009. Faint ultraviolet illumination of the lunar dark side includes light from stars and from hydrogen Lyα emissions, mostly attributed to sunlight scattered by hydrogen atoms near the Sun with a smaller contribution from the whole Ga…
Spectroscopic and Photometric Study of the S-type Mira V667 Cassiopeiae and the Carbon Star OR Cephei
Boyd, D.
We report on spectroscopic and photometric observations of the S-type Mira V667 Cas and the carbon star Mira OR Cep recorded during one pulsation cycle of each star in 2022. Spectra are calibrated in absolute flux using concurrent photometry. We present measurements of V and Ic magnitudes and V-Ic color index, classify spectra in the revised MK sy…
Precise measurement of pion-bump structure using future MeV gamma-ray detectors
Liu, Jiahao; Liu, Bing; Yang, Ruizhi
The pion-bump structure in the
The Goldstone Apple Valley Radio Telescope (GAVRT) Search for Extra Terrestrial Intelligence (SETI)
Gorjian, Varoujan; Lazio, Joseph; Levin, Steven +6 more
This paper reports the results from a student-led Search for Extraterrestrial Intelligence (SETI), also known as technosignatures, targeting the plane of the Milky Way as a part of the Goldstone Apple Valley Radio Telescope (GAVRT) collaboration between the Lewis Center for Educational Research (LCER) and the Jet Propulsion Laboratory. Students as…