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EMISSA (Exploring Millimeter Indicators of Solar-Stellar Activity). I. The initial millimeter-centimeter main-sequence star sample
Mohan, A.; Hauschildt, P. H.; Wedemeyer, S. +2 more
Context. Due to their wide wavelength coverage across the millimeter to centimeter (mm-cm) range and their increased sensitivity, modern interferometric arrays facilitate observations of the thermal and non-thermal radiation that is emitted from different layers in the outer atmospheres of stars.
Aims: We study the spectral energy distributio…
Chandra, NuSTAR, and Optical Observations of the Cataclysmic Variables IGR J17528-2022 and IGR J20063+3641
Mori, Kaya; Thorstensen, John R.; Halpern, Jules P. +5 more
We report on Chandra, NuSTAR, and MDM observations of two International Gamma-ray Astrophysics Laboratory (INTEGRAL) sources, namely IGR J17528-2022 and IGR J20063+3641. IGR J17528-2022 is an unidentified INTEGRAL source, while IGR J20063+3641 was recently identified as a magnetic cataclysmic variable (mCV) by Halpern et al. The Chandra observatio…
The OTELO survey as a morphological probe. Last ten Gyr of galaxy evolution. The mass-size relation up to z = 2
Gallego, Jesús; Sánchez-Portal, Miguel; Pintos-Castro, Irene +14 more
Context. The morphology of galaxies provide us with a unique tool for relating and understanding other physical properties and their changes over the course of cosmic time. It is only recently that we have been afforded access to a wealth of data for an unprecedented number galaxies thanks to large and deep surveys.
Aims: We present the morph…
A Giant Loop of Ionized Gas Emerging from the Tumultuous Central Region of IC 5063
Ho, Luis C.; Elvis, Martin; Fischer, Travis C. +6 more
The biconical radiation pattern extending from an active galactic nucleus (AGN) may strongly photoionize the circumnuclear interstellar medium (ISM) and stimulate emission from the narrow-line region (NLR). Observations of the NLR may provide clues to the structure of dense material that preferentially obscures the bicone at certain angles, and ma…
FOXSI-2 Solar Microflares. II. Hard X-ray Imaging Spectroscopy and Flare Energetics
Krucker, Säm; Ryan, Daniel F.; Musset, Sophie +7 more
We study the nature of energy release and transfer for two sub-A class solar microflares observed during the second Focusing Optics X-ray Solar Imager (FOXSI-2) sounding rocket flight on 2014 December 11. FOXSI is the first solar-dedicated instrument to utilize focusing optics to image the Sun in the hard X-ray (HXR) regime, sensitive to energies …
Mass-radius relation of intermediate-age disc super star clusters of M82
Mayya, Y. D.; Rosa-González, D.; Puerari, I. +1 more
We present a complete set of structural parameters for a sample of 99 intermediate-age super star cluster (SSCs) in the disc of M82, and carry out a survival analysis using the semi-analytical cluster evolution code EMACSS. The parameters are based on the profile-fitting analysis carried out in previous work, with the mass-related quantities deriv…
Magneto-acoustic oscillations observed in a solar plage region
Cao, Wenda; Xu, Zhe; Ji, Kaifan +4 more
We gave an extensive study for the quasi-periodic perturbations on the time profiles of the line of sight (LOS) magnetic field in 10 × 10 sub-areas in a solar plage region (corresponds to a facula on the photosphere). The perturbations are found to be associated with the enhancement of He I 10830 Å absorption in a moss region, which is connected t…
Implications of Increased Central Mass Surface Densities for the Quenching of Low-mass Galaxies
Papovich, Casey; Pérez-González, Pablo G.; Bell, Eric F. +12 more
We use the Cosmic Assembly Deep Near-infrared Extragalactic Legacy Survey data to study the relationship between quenching and the stellar mass surface density within the central radius of 1 kpc (Σ1) of low-mass galaxies (stellar mass M* ≲ 109.5 M⊙) at 0.5 ≤ z < 1.5. Our sample is mass complete down t…
Global Hybrid Simulations of Interaction Between Interplanetary Rotational Discontinuity and Bow Shock/Magnetosphere: Can Ion Scale Magnetic Reconnection be Driven by Rotational Discontinuity Downstream of Quasi Parallel Shock?
Wang, Xueyi; Lin, Yu; Guo, Zhifang
Ion scale magnetic reconnection has been observed downstream of the terrestrial quasi parallel (Q ∥) shock. Whether it is driven by interplanetary discontinuities or turbulent Q ∥ shock, however, is unclear. Using three dimensional global hybrid simulation, we investigate the generation of magnetic reconnection downstream of the Q ∥ shock, while a…
The Characterization of the Dust Content in the Ring Around Sz 91: Indications of Planetesimal Formation?
Palau, Aina; Carrasco-González, Carlos; Olofsson, Johan +6 more
One of the most important questions in the field of planet formation is how millimeter- and centimeter-sized dust particles overcome radial drift and fragmentation barriers to form kilometer-sized planetesimals. ALMA observations of protoplanetary disks, in particular transition disks or disks with clear signs of substructures, can provide new con…