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Do blue galaxy-clusters have hot intracluster gas?
Oguri, Masamune; Kodama, Tadayuki; Okabe, Nobuhiro +5 more
We present herein a systematic X-ray analysis of blue galaxy clusters at z = 0.84 discovered by the Subaru telescope. The sample consisted of 43 clusters identified by combining red-sequence and blue-cloud surveys, covering a wide range of emitter fractions (i.e., 0.3-0.8). The spatial extent of the over-density region of emitter galaxies was appr…
Constraining the Planet Occurrence Rate around Halo Stars of Potentially Extragalactic Origin
Price-Whelan, Adrian M.; Yoshida, Stephanie; Grunblatt, Samuel
The search for planets orbiting other stars has recently expanded to include stars from galaxies outside the Milky Way. With the Transiting Exoplanet Survey Satellite (TESS) and Gaia surveys, photometric and kinematic information can be combined to identify transiting planet candidates of extragalactic origin. Here, 1080 low-luminosity red-giant b…
Kinematics of OB Stars with Data from the LAMOST and Gaia Catalogues
Bobylev, V. V.; Bajkova, A. T.; Karelin, G. M.
We have analyzed the kinematics of OB stars from the list by Xiang et al. (2021) that contains ${∼}13 000$ single OB stars. For these stars there are photometric distance estimates and proper motions from the Gaia catalogue and line-of-sight velocities from the LAMOST catalogue. Based on a sample of single OB stars and using the photometric distan…
Detection of the third innermost radiation belt on LEO CORONAS-Photon satellite around 2009 solar minimum
Phillips, Kenneth J. H.; Sylwester, Janusz; Dudnik, Oleksiy V. +2 more
We analyze variations of high energy charged particle populations filling various magnetospheric regions under, inside and outside of the Van Allen inner and outer electron radiation belts in May 2009. The study is based on the experimental data obtained from the STEP-F and the SphinX instruments placed close to each other aboard the low-Earth cir…
Cometary ions detected by the Cassini spacecraft 6.5 au downstream of Comet 153P/Ikeya-Zhang
Jones, G. H.; McComas, D. J.; Smith, E. J. +5 more
During March-April 2002, while between the orbits of Jupiter and Saturn, the Cassini spacecraft detected a significant enhancement in pickup proton flux. The most likely explanation for this enhancement was the addition of protons to the solar wind by the ionization of neutral hydrogen in the corona of comet 153P/Ikeya-Zhang. This comet passed rel…
A photometric study of V608 Cam: apparent period changes as a result of surface activity
Wolf, M.; Walter, F.; Šebek, F.
The VRI light curves were measured for the low-mass eclipsing binary V608 Cam as a part of our long-term observational project for studying of eclipsing binaries with a short orbital period. The TESS light curve solution in PHOEBE results to the detached configuration, where the temperature of the primary component was fixed to T1 = 530…
BD+47 378: An Eclipsing Binary Containing a δ Sct Pulsating Star
Han, Cheongho; Hong, Kyeongsoo; Rittipruk, Pakakaew +3 more
New high-resolution spectra of the eclipsing binary BD+47 378 were obtained on five nights between 2020 and 2021 with the Bohyunsan Observatory Echelle Spectrograph in Korea. We collected the TESS light curve of the system obtained from Sectors 17 to 18, which shows a flat bottom at the secondary eclipse, an O'Connell effect, and oscillation featu…
PSZ2 G091: A massive double cluster at z 0.822 observed by the NIKA2 camera
Berta, S.; Aussel, H.; Adam, R. +48 more
PSZ2 G091.83+26.11 is a massive galaxy cluster with M500 = 7:43 × 1014M⊙ at z = 0:822. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in the Planck sample as a single, spherical cluster following a universal profile [1]. This model can lea…
The cosmic environment overtakes the local density in shaping galaxy star formation
Fang, Min; Bian, Fuyan; Huang, Jia-Sheng +11 more
The gas supply from the cosmic web is the key to sustain star formation in galaxies. It remains to be explored how the cosmic large-scale structure (LSS) effects on galaxy evolution at given local environments. We examine galaxy-specific star formation rate as a function of local density in a LSS at z = 0.735 in the Extended Chandra Deep Field Sou…
Comparison between probability density functions of vertical electric current in solar active regions based on HMI/SDO and SOT/Hinode data
Zimovets, Ivan; Nechaeva, Alena; Sharykin, Ivan
Studying electric currents in solar active regions (AR) is an essential step in understanding solar activity in general and solar flares in particular. In this paper, we compare probability density functions of vertical electric current PDF(|jz|) in several active regions, using HMI/SDO and SOT/Hinode photospheric magnetic field data. We have esta…