Search Publications
The Global Meteor Network - Methodology and first results
Vida, Denis; Brown, Peter G.; Mazur, Michael J. +10 more
The Global Meteor Network (GMN) utilizes highly sensitive low-cost CMOS video cameras which run open-source meteor detection software on Raspberry Pi computers. Currently, over 450 GMN cameras in 30 countries are deployed. The main goal of the network is to provide long-term characterization of the radiants, flux, and size distribution of annual m…
SPICY: The Spitzer/IRAC Candidate YSO Catalog for the Inner Galactic Midplane
Hillenbrand, Lynne A.; Povich, Matthew S.; Kuhn, Michael A. +5 more
We present ∼120,000 Spitzer/IRAC candidate young stellar objects (YSOs) based on surveys of the Galactic midplane between ℓ ∼ 255° and 110°, including the GLIMPSE I, II, and 3D, Vela-Carina, Cygnus X, and SMOG surveys (613 square degrees), augmented by near-infrared catalogs. We employed a classification scheme that uses the flexibility of a tailo…
Slow-Mode Magnetoacoustic Waves in Coronal Loops
Reale, Fabio; Srivastava, Abhishek K.; Ofman, Leon +3 more
Rapidly decaying long-period oscillations often occur in hot coronal loops of active regions associated with small (or micro-) flares. This kind of wave activity was first discovered with the SOHO/SUMER spectrometer from Doppler velocity measurements of hot emission lines, thus also often called "SUMER" oscillations. They were mainly interpreted a…
A bright γ-ray flare interpreted as a giant magnetar flare in NGC 253
Mitrofanov, I.; Hurley, K.; von Kienlin, A. +33 more
Soft γ-ray repeaters exhibit bursting emission in hard X-rays and soft γ-rays. During the active phase, they emit random short (milliseconds to several seconds long), hard-X-ray bursts, with peak luminosities1 of 1036 to 1043 erg per second. Occasionally, a giant flare with an energy of around 1044 to 10…
SPECULOOS: Ultracool dwarf transit survey. Target list and strategy
Queloz, D.; Delrez, L.; Gillon, M. +20 more
Context. One of the most promising avenues for the detailed study of temperate Earth-sized exoplanets is the detection of such planets in transit in front of stars that are small and near enough to make it possible to carry out a thorough atmospheric characterisation with next-generation telescopes, such as the James Webb Space telescope (JWST) or…
Hubble tension or a transition of the Cepheid SnIa calibrator parameters?
Perivolaropoulos, Leandros; Skara, Foteini
We reanalyze the Cepheid data used to infer the value of the Hubble constant H0 by calibrating type Ia supernovae. We do not enforce a universal value of the empirical Cepheid calibration parameters RW (Cepheid Wesenheit color-luminosity parameter) and MHW (Cepheid Wesenheit H-band absolute magnitude). I…
The evolution of the solar wind
Vidotto, Aline A.
How has the solar wind evolved to reach what it is today? In this review, I discuss the long-term evolution of the solar wind, including the evolution of observed properties that are intimately linked to the solar wind: rotation, magnetism and activity. Given that we cannot access data from the solar wind 4 billion years ago, this review relies on…
The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1. IV. Photometric redshifts and stellar masses
Bondi, M.; Prandoni, I.; Bowler, R. A. A. +21 more
The Low Frequency Array (LOFAR) Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey split across multiple tiers over the northern sky. The first LoTSS Deep Fields data release consists of deep radio continuum imaging at 150 MHz of the Boötes, European Large Area Infrared Space Observatory Survey-North 1, and Lockman Hol…
The Panchromatic Afterglow of GW170817: The Full Uniform Data Set, Modeling, Comparison with Previous Results, and Implications
Frail, D. A.; Hallinan, G.; Murphy, E. J. +35 more
We present the full panchromatic afterglow light-curve data of GW170817, including new radio data as well as archival optical and X-ray data, between 0.5 and 940 days post-merger. By compiling all archival data and reprocessing a subset of it, we have evaluated the impact of differences in data processing or flux determination methods used by diff…
The LOFAR Two-metre Sky Survey Deep Fields. The star-formation rate-radio luminosity relation at low frequencies
Bondi, M.; Prandoni, I.; Wang, L. +17 more
In this paper, we investigate the relationship between 150 MHz luminosity and the star-formation rate - the SFR-L150 MHz relation - using 150 MHz measurements for a near-infrared selected sample of 118 517 z < 1 galaxies. New radio survey data offer compelling advantages over previous generation surveys for studying star formation in…