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The XXL Survey. XLII. The LX - σv relation of galaxy groups and clusters detected in the XXL and GAMA surveys
Chiappetti, L.; Pierre, M.; Adami, C. +19 more
The XXL Survey is the largest homogeneous survey carried out with XMM-Newton. Covering an area of 50 deg2, the survey contains several hundred galaxy clusters out to a redshift of ≈2, above an X-ray flux limit of ~6 × 10-15 er g cm-2 s-1. The GAMA spectroscopic survey of ~300 000 galaxies covers ≈286 deg…
Digital elevation model workflow improvements for the MarsSI platform and resulting orthorectified mosaic of Oxia Planum, the landing site of the ExoMars 2022 rover
Quantin-Nataf, Cathy; Volat, Matthieu; Dehecq, Amaury
In this publication, we explore the options to improve the quality and speed of DEM generation procedures from stereo-photogrammetry pipeline of the MarsSI online service. We study available algorithms, options and workflows. Taking inspiration on earth-based work, we propose a new workflow relying on the semi-global matching algorithms and a two …
Deep near-infrared imaging observation of the faint X-ray point sources constituting the Galactic bulge X-ray emission
Gandhi, Poshak; Tsujimoto, Masahiro; Ebisawa, Ken +1 more
The presence of the apparently extended hard (2-10 keV) X-ray emission along the Galactic plane has been known since the early 1980s. With a deep X-ray exposure using the Chandra X-ray Observatory of a slightly off-plane region in the Galactic bulge, most of the extended emission was resolved into faint discrete X-ray sources in the Fe K band (Rev…
OGLE-2016-BLG-1093Lb: A Sub-Jupiter-mass Spitzer Planet Located in the Galactic Bulge
Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk +62 more
OGLE-2016-BLG-1093 is a planetary microlensing event that is part of the statistical Spitzer microlens parallax sample. The precise measurement of the microlens parallax effect for this event, combined with the measurement of finite-source effects, leads to a direct measurement of the lens masses and system distance, M host =0.38-0.57 M…
A Multiwavelength Study of the Highly Asymmetrical Debris Disk around HD 111520
Crotts, Katie A.; Matthews, Brenda C.; Duchêne, Gaspard +7 more
We observed the nearly edge-on debris disk system HD 111520 at the HJ and K1 near-infrared (NIR) bands using both the spectral and polarization modes of the Gemini Planet Imager. With these new observations, we have performed an empirical analysis in order to better understand the disk morphology and its highly asymmetrical nature. We find that th…
The quiet sun at mm wavelengths as seen by ALMA
Brajša, Roman; Bastian, T. S.; Alissandrakis, Costas E.
Solar observations at sub-mm, mm and cm wavelengths offer a straightforward diagnostic of physical conditions in the solar atmosphere because they yield measurement of brightness temperature which, for optically thick features, equals intrinsic temperature - much unlike solar diagnostics in other spectral ranges. The Atacama Large Millimeter and s…
A study on the solar coronal dynamics during the post-maxima phase of the solar cycle 24 using S-band radio signals from the Indian Mars Orbiter Mission
Jain, Richa N.; Choudhary, R. K.; Bhardwaj, Anil +3 more
Radio signals from India's Mars Orbiter Mission (MOM) have been used to study turbulence in the solar plasma during the post-maximum phase of solar cycle 24. S-band (2.29 GHz) radio carrier downlink signals from MOM were received at the Indian Deep Space Network, Bangalore, and frequency residuals were spectrally analysed to obtain coronal turbule…
The use of the Pearson differential equation to test energetic distributions in space physics as Kappa distributions; implication for Tsallis nonextensive entropy: II
Shizgal, Bernie D.
This paper presents a mathematical demonstration that particular observed energetic particle distributions of space physics in the particle velocity magnitude,
A Machine Learning Approach to Predicting SEP Events Using Properties of Coronal Mass Ejections
Zhang, Ming; Zhao, Lulu; Torres, Jesse +1 more
Solar energetic particles (SEPs) can cause severe damage to astronauts and their equipment, and can disrupt communications on Earth. A lack of thorough understanding the eruption processes of solar activities and the subsequent acceleration and transport processes of energetic particles makes it difficult to forecast the occurrence of an SEP event…
Establishing the accuracy of asteroseismic mass and radius estimates of giant stars - II. Revised stellar masses and radii for KIC 8430105
Grundahl, F.; Lund, M. N.; Miglio, A. +6 more
Asteroseismic scaling relations can provide high-precision measurements of mass and radius for red giant (RG) stars displaying solar-like oscillations. Their accuracy can be validated and potentially improved using independent and accurate observations of mass, radius, effective temperature and metallicity. We seek to achieve this using long perio…