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Further Studies of the Association of Planetary Nebula BMP J16135406 with Galactic Open Cluster NGC 6067
Parker, Quentin A.; Sabin, Laurence; Zijlstra, Albert A. +3 more
Planetary Nebulae (PNe) that are physical members of Galactic open clusters are powerful probes that allow precise determination of their distance and crucially their initial mass on the main sequence. Here, we revisit the physical association of the PN BMP J1613–5406 with the open cluster NGC 6067 and present our preliminary results based on our …
Mass assembly history of dark matter haloes in the light of H0 tension
Kameli, Hamed; Baghram, Shant
The Hubble tension may introduce a new course of action to revise the standard Lambda cold dark matter (ΛCDM) model to unravel dark energy and dark matter physics. The Hubble parameter can be reconstructed by late-time observations of the background evolution model independently. We relate the reconstructed Hubble parameter to the structure format…
Understanding the physical state of hot plasma formed through stellar wind collision in WR140 using high-resolution X-ray spectroscopy
Hamaguchi, Kenji; Miyamoto, Asca; Sugawara, Yasuharu +5 more
We analyse a series of XMM-Newton RGS data of the binary Wolf-Rayet star WR140 that encompasses one entire orbit. We find that the RGS detects X-rays from optically thin thermal plasma only during orbital phases when the companion O star is on the near side of the WR star. Although such X-rays are believed to be emitted from the shock cone formed …
Local-time Dependence of Chemical Species in the Venusian Mesosphere
Shao, Wencheng D.; Zhang, Xi; Mendonça, João +1 more
Observed chemical species in the Venusian mesosphere show local-time variabilities. SO2 at the cloud top exhibits two local maxima over local time, H2O at the cloud top is uniformly distributed, and CO in the upper atmosphere shows a statistical difference between the two terminators. In this study, we investigated these loca…
Substellar Hyades Candidates from the UKIRT Hemisphere Survey
Cushing, Michael C.; Schneider, Adam C.; Faherty, Jacqueline K. +14 more
We have used data from the UKIRT Hemisphere Survey to search for substellar members of the Hyades cluster. Our search recovered several known substellar Hyades members, and two known brown dwarfs that we suggest may be members based on a new kinematic analysis. We uncovered thirteen new substellar Hyades candidates, and obtained near-infrared foll…
Searching for giant planets in the outer Solar system with far-infrared all-sky surveys
Serjeant, Stephen; Sedgwick, Chris
We have explored a method for finding giant planets in the outer Solar system by detecting their thermal emission and proper motion between two far-infrared all-sky surveys separated by 23.4 yr, taken with the InfraRed Astronomical Satellite (IRAS) and the AKARI Space Telescope. An upper distance limit of about 8000 AU is given by both the sensiti…
Differential Proper Motion Spin of the Hipparcos and Gaia Celestial Reference Frames
Makarov, Valeri V.
The Hipparcos catalog provides the first epoch of the celestial reference frame (CRF) in the optical domain and serves as an indispensable tool to verify and improve the Gaia CRF for the brighter stars (V < 11 mag) and to identify the elusive astrometric binary stars with dim or invisible companions, including long-period exoplanets. The system…
SDSS-IV MaNGA: Identification and multiwavelength properties of Type-1 AGN in the DR15 sample
Negrete, C. A.; Hernández-Toledo, H. M.; Ibarra-Medel, H. +2 more
We present a method to identify type-1 active galactic nuclei (AGNs) in the central 3 arcsec integrated spectra of galaxies in the MaNGA DR15 sample. It is based on flux ratios estimates in spectral bands flanking the expected H α broad component H αBC. The high signal-to-noise ratio obtained (mean S/N = 84) permits the identification o…
Revising Properties of Planet-Host Binary Systems. II. Apparent Near-Earth-analog Planets in Binaries Are Often Sub-Neptunes
Kraus, Adam L.; Sullivan, Kendall
Identifying rocky planets in or near the habitable zones of their stars (near-Earth analogs) is one of the key motivations of many past and present planet-search missions. The census of near-Earth analogs is important because it informs calculations of the occurrence rate of Earth-like planets, which in turn feed into calculations of the yield of …
The changing-look AGN NGC 1566 in quiescence with XMM-Newton: a nuclear starburst and an AGN competing in power?
Santos-Lleó, M.; Ballo, L.; Jiménez Bailón, E. +8 more
Star formation accretion on to the super massive black holes (SMBHs) and feedback processes link the evolution of galaxies with their SMBHs. X-ray observations in the imaging and spectral regime have revealed to be an important tool to study the connection between nuclear activity and circumnuclear star formation in nearby active galactic nuclei (…