Search Publications
Space Telescope and Optical Reverberation Mapping Project. XIII. An Atlas of UV and X-Ray Spectroscopic Signatures of the Disk Wind in NGC 5548
Kriss, G. A.; Mehdipour, M.; Peterson, B. M. +8 more
The unusual behavior of the spectral lines of NGC5548 during the STORM campaign demonstrated a missing piece in the structure of AGNs. For a two-month period in the middle of the campaign, the spectral lines showed a deficit in flux and a reduced response to the variations of the UV continuum. This was the first time that this behavior was unequiv…
Interplanetary Shock Candidates Observed at Venus's Orbit
Wang, Yuming; Shen, Chenglong; Xu, Mengjiao +2 more
The measurements from the Venus Express spacecraft are analyzed for the basic properties of fast forward interplanetary shocks at Venus's orbit (∼0.72 au). A total of 143 fast forward interplanetary shock candidates during 2006-2014 are identified. The shock angle ΘBn, defined as the angle between the shock normal and the upstream magne…
Modeling the Hydrodynamics, Sediment Transport, and Valley Incision of Outlet-Forming Floods From Martian Crater Lakes
Goudge, Timothy A.; Fassett, Caleb I.
Open-basin lakes that have outlets, formed where the stored water breached the basin-confining topography (e.g., crater rims), have been recognized on Mars for decades. However, the mechanics involved in formation of these outlets has not been studied in detail. Here, we study this outlet formation process through a series of numerical experiments…
Revisiting pulsar velocities using Gaia Data Release 2
Tsai, Chao-Wei; Li, Di; Zhang, Jie +3 more
Precise measurements of neutron star (NS) velocities provide critical clues in regard to the supernova physics and evolution of binary systems. Based on Gaia Data Release 2 (DR2), we selected a sample of 24 young (< 3 Myr) pulsars with precise parallax measurements and measured the velocity of their local standard of rest (LSR) and the velocity…
Google dataset search and DOI for data in the ESA space science archives
De Marchi, Guido; Masson, Arnaud; Merin, Bruno +3 more
Reproducibility is at the core of science. For this reason, a common practice for authors is to provide links to the data used in their manuscripts upon submission to peer-reviewed journals. In space science, reference to archives' websites of major data providers like space agencies are still accepted by most journals. However, even these website…
Low-frequency radio spectra of submillimetre galaxies in the Lockman Hole
Bondi, M.; Prandoni, I.; Franco, M. +19 more
Aims: We investigate the radio properties of a sample of 850 µm-selected sources from the SCUBA-2 Cosmology Legacy Survey (S2CLS) using new deep, low-frequency radio imaging of the Lockman Hole field from the Low Frequency Array. This sample consists of 53 sources, 41 of which are detected at >5σ at 150 MHz.
Methods: Combining t…
Fast Sausage Oscillations in Coronal Loops with Fine Structures
Guo, Mingzhe; Li, Bo; Shi, Mijie
Fast sausage modes (FSMs) in flare loops have long been invoked to account for rapid quasi-periodic pulsations (QPPs) with periods of order seconds in flare lightcurves. However, most theories of FSMs in solar coronal cylinders assume a perfectly axisymmetric equilibrium, an idealized configuration apparently far from reality. In particular, it re…
New candidates for AM Canum Venaticorum stars among ASAS-SN transients
Kato, Taichi; Kojiguchi, Naoto
We studied Zwicky Transient Facility (ZTF) light curves of 34 dwarf nova candidates discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) between 2020 May 12 and September 9 and found six AM CVn-type candidates. All objects showed short outbursts (post-superoutburst rebrightenings) on the fading tail. Two objects (ASASSN-20eq, ASASSN…
Interrelationships in the Gypsum–Syngenite–Görgeyite System and Their Possible Formation on Mars
Arana, Gorka; Madariaga, Juan Manuel; García-Florentino, Cristina +7 more
The Science of Fundamental Catalogs
Makarov, Valeri V.; Kopeikin, Sergei M.
This review paper discusses the science of astrometric catalogs, their current applications and future prospects for making progress in fundamental astronomy, astrophysics and gravitational physics. We discuss the concept of fundamental catalogs, their practical realizations, and future perspectives. Particular attention is paid to the astrophysic…