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Torus Constraints in ANEPD-CXO245: A Compton-thick AGN with Double-peaked Narrow Lines
Goto, Tomotsugu; Burgarella, Denis; Tanimoto, Atsushi +18 more
We report on the torus constraints of the Compton-thick active galactic nucleus (AGN) with double-peaked optical narrow-line region emission lines, ANEPD-CXO245, at z = 0.449 in the AKARI NEP Deep Field. The unique infrared data on this field, including those from the nine-band photometry over 2-24 µm with the AKARI Infrared Camera, and the …
Stellar cusp and warm dust at the heart of NGC 1068
Rouan, D.; Gratadour, D.; Grosset, L.
Aims: Establishing precisely how stars and interstellar medium distribute within the central 100 pc area around an AGN, down to the pc scale, is key to understanding the late stages of transfer of matter onto the accretion disc.
Methods: Using adaptive optics-assisted (SPHERE-VLT) near-IR images in the H band, Ks band, and sev…
AKARI NEP field: Point source catalogs from GALEX and Herschel observations and selection of candidate lensed sub-millimeter galaxies
Goto, Tomotsugu; Burgarella, Denis; Pearson, Chris +9 more
The AKARI Wide North Ecliptic field is one of the most important cosmological fields because it lies in the continuous viewing zones for many space telescopes, e.g., Herschel, HST, and JWST, and it is also a natural high-visibility field from the L2 halo orbit. The field will be also the location of the deep survey for the Euclid mission. Finally,…
Local Time Variation in the Large-Scale Structure of Saturn's Magnetosphere
Dougherty, M. K.; Arridge, C. S.; Guio, P. +3 more
The large-scale structure of Saturn's magnetosphere is determined by internal and external factors, including the rapid planetary rotation rate, significant internal hot and cold plasma sources, and varying solar wind pressure. Under certain conditions the dayside magnetospheric magnetic field changes from a dipolar to more disk-like structure, du…
T Tauri stars in the SuperWASP and NSVS surveys
Paunzen, E.; Smalley, B.; Vaňko, M. +1 more
We present a study of the long-term optical variability of young T Tauri stars using previously unpublished data from the Super-Wide Angle Search for Planets (SuperWASP) project. Other publicly available photometry from the Northern Sky Variability Survey (NSVS) and the National Aeronautics and Space Administration (NASA) K2 mission were used to c…
Properties of the Diffuse Emission around Warm Loops in Solar Active Regions
Brooks, David H.
Coronal loops in active regions are the subjects of intensive investigation, but the important diffuse unresolved emission in which they are embedded has received relatively little attention. Here I measure the densities and emission measure (EM) distributions of a sample of background-foreground regions surrounding warm (2 MK) coronal loops, and …
The Eruption of Outer Spine-like Loops Leading to a Double-stage Circular-ribbon Flare
Liu, Chang; Wang, Haimin; Lee, Jeongwoo
Circular-ribbon flares occur in a confined magnetic structure, but can also be associated with coronal mass ejections (CMEs) when a filament embedded under the fan erupts. Here we study an M8.7 circular-ribbon flare (SOL2014-12-17T04:51), which is accompanied by a CME yet without a clear indication of filament eruption. Using a nonlinear force-fre…
A particular carbon-chain-producing region: L1489 starless core
Kim, Kee-Tae; Liu, Tie; Yuan, Jinghua +14 more
We detected carbon-chain molecules (CCMs) HC2n+1N (n = 1-3) and C3S in Ku band as well as high-energy excitation lines including C4H N = 9-8, J = 17/2-15/2, 19/2-17/2, and CH3CCH J = 5-4, K = 2 in the 3 mm band toward a starless core called the eastern molecular core (EMC) of L1489 IRS. Maps o…
When Does the Onset of Multiple Stellar Populations in Star Clusters Occur. II. No Evidence of Multiple Stellar Populations in Lindsay 113
Milone, Antonino P.; Li, Chengyuan; Wang, Yue
The presence of multiple populations (MPs) in almost all globular clusters (GCs) older than ∼10 Gyr has drawn lots of attention. Recently, cumulative evidence has indicated that extragalactic GCs that are older than 2 Gyr seem to also harbor MPs; however, those that are younger than 2 Gyr do not. These observations seem to imply that age is a prim…
The G305 Star-forming Region. I. Newly Classified Hot Stars
Kounkel, Marina; Minniti, Dante; Stringfellow, Guy +12 more
The relatively nearby star-forming complex G305 is one of the most luminous H II regions in the Galaxy, and it contains several sites and epochs of star formation. Using a combination of near-infrared photometry from “Vista Variables in Via Lactea” ESO Large Public Survey, SDSS-IV APOGEE-2 spectra, and Gaia DR2 photometry and astrometry, we report…