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Rotation of a Stealth CME on 2012 October 5 Observed in the Inner Heliosphere
Gopalswamy, Nat; Yashiro, Seiji; Srivastava, Nandita +3 more
Coronal mass ejections (CMEs) are subject to changes in their direction of propagation, tilt, and other properties. This is because CMEs interact with the ambient solar wind and other large-scale magnetic field structures. In this work, we report on the observations of the 2012 October 5 stealth CME using coronagraphic and heliospheric images. We …
Accuracy Analysis of the On-board Data Reduction Pipeline for the Polarimetric and Helioseismic Imager on the Solar Orbiter Mission
Hirzberger, Johann; Solanki, Sami K.; Woch, Joachim +4 more
Context: Scientific data reduction on-board deep space missions is a powerful approach to maximise science return, in the absence of wide telemetry bandwidths. The Polarimetric and Helioseismic Imager (PHI) on-board the Solar Orbiter (SO) is the first solar spectropolarimeter that opted for this solution, and provides the scientific community with…
Solar Soft X-Ray Irradiance Variability, II: Temperature Variations of Coronal X-Ray Features
Masuda, Satoshi; DeLuca, Edward; Kusano, Kanya +7 more
The temperature variations of the corona and its individual surface features as a function of the solar cycle are an interesting and important aspect of understanding the physics of the Sun. To study the temperature variations, we have used the full-disk soft X-ray images of the corona obtained from Hinode/X-Ray Telescope (XRT) in different filter…
Large-scale CO (J = 1-0) Observations toward the M120.1+3.0 Molecular Cloud: A Filament with a Chain of Starburst Clusters
Fang, Min; Zhang, Shiyu; Su, Yang +11 more
We present large-scale (2° × 2°) observations toward the molecular cloud M120.1+3.0, using 12CO, 13CO and C18O (J = 1 - 0) data from the Purple Mountain Observatory 13.7 m millimeter telescope. The distance of the cloud is measured to be ~1.1 kpc. Using the 13CO data, we identify a main filament F1 and t…
Homogenizing SOHO/EIT and SDO/AIA 171 Å Images: A Deep-learning Approach
Chatterjee, Subhamoy; Dayeh, Maher A.; Bain, Hazel M. +2 more
Extreme-ultraviolet (EUV) images of the Sun are becoming an integral part of space weather prediction tasks. However, having different surveys requires the development of instrument-specific prediction algorithms. As an alternative, it is possible to combine multiple surveys to create a homogeneous data set. In this study, we utilize the temporal …
Probabilistic classification of infrared-selected targets for SPHEREx mission: in search of young stellar objects
Kang, Miju; Ashby, Matthew L. N.; Hora, Joseph L. +3 more
We apply machine learning algorithms to classify infrared (IR)-selected targets for NASA's upcoming Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) mission. In particular, we are interested in classifying young stellar objects (YSOs), which are essential for understanding the star formation pro…
Parameters for >300 million Gaia stars: Bayesian inference vs. machine learning
Anders, F.; Chiappini, C.; Khalatyan, A. +2 more
The Gaia Data Release 3 (DR3), published in June 2022, delivers a diverse set of astrometric, photometric, and spectroscopic measurements for more than a billion stars. The wealth and complexity of the data makes traditional approaches for estimating stellar parameters for the full Gaia dataset almost prohibitive. We have explored different superv…
Uncovering the MIR emission of quiescent galaxies with JWST
Gómez-Guijarro, C.; Magdis, G. E.; Rigopoulou, D. +15 more
We present a study of the mid-IR (MIR) emission of quiescent galaxies (QGs) beyond the local universe. Using deep JWST imaging in the SMACS-0723 cluster field we identify a mass-limited (M* > 109 M⊙) sample of intermediate redshift QGs (0.2 < z < 0.7) and perform modelling of their rest-frame UV to MIR pho…
Photometric Analysis of Eclipsing Binaries: VY UMi, RU UMi and GSC 04364-00648
Parimucha, Š.; Kudak, V.; Perig, V. +1 more
We present the photometric analysis of BVR and TESS light curves of three eclipsing binaries, together with their period changes considering archival data and new minima times from our and TESS observations. For the first time we detected wave-like variations with low-amplitude in O − C residua of RU UMi, which can be interpreted as a consequence …
Optical Identification of the Shortest-period Spider Pulsar System M71E
Dong, Subo; Liu, Zhuokai
M71E is a spider pulsar (i.e., a millisecond pulsar with a tight binary companion) with the shortest known orbital period of P = 53.3 minutes, which was discovered by Pan et al. Their favored evolutionary model suggests that it bridges between two types of spider pulsars, namely, it descended from a "redback" and will become a "black widow." Using…