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Geodesy of irregular small bodies via neural density fields
Izzo, Dario; Gómez, Pablo
Asteroids' and comets' geodesy is a challenging yet important task for planetary science and spacecraft operations, such as ESA's Hera mission tasked to look at the aftermath of the recent NASA DART spacecraft's impact on Dimorphos. Here we present a machine learning approach based on so-called geodesyNets which learns accurate density models of i…
Spirality: A Novel Way to Measure Spiral Arm Pitch Angle
Davis, Benjamin L.; Boe, Benjamin; Kennefick, Daniel +7 more
We present the MATLAB code Spirality, a novel method for measuring spiral arm pitch angles by fitting galaxy images to spiral templates of known pitch. Computation time is typically on the order of 2 min per galaxy, assuming 8 GB of working memory. We tested the code using 117 synthetic spiral images with known pitches, varying both the spiral pro…
Multi-spacecraft Observations of the Evolution of Interplanetary Coronal Mass Ejections between 0.3 and 2.2 au: Conjunctions with the Juno Spacecraft
Lugaz, Noé; Scolini, Camilla; Winslow, Réka M. +4 more
We present a catalog of 35 interplanetary coronal mass ejections (ICMEs) observed by the Juno spacecraft and at least one other spacecraft during its cruise phase to Jupiter. We identify events observed by MESSENGER, Venus Express, Wind, and STEREO with magnetic features that can be matched unambiguously with those observed by Juno. A multi-spacec…
Information content of BP/RP spectra in Gaia DR3
Belokurov, Vasily; Aguado, David S.; Evans, N. Wyn +6 more
Gaia Data Release 3 has provided the astronomical community with the largest stellar spectroscopic survey to date (> 220 million sources). The low resolution (R~50) blue photometer (BP) and red photometer (RP) spectra will allow for the estimation of stellar atmospheric parameters such as effective temperature, surface gravity, and metallicity.…
Pilot-WINGS: An extended MUSE view of the structure of Abell 370
Koekemoer, Anton M.; Mahler, Guillaume; Richard, Johan +22 more
We investigate the strong-lensing cluster Abell 370 (A370) using a wide Integral Field Unit (IFU) spectroscopic mosaic from the Multi-Unit Spectroscopic Explorer (MUSE). IFU spectroscopy provides significant insight into the structure and mass content of galaxy clusters, yet IFU-based cluster studies focus almost exclusively on the central Einstei…
The supernova of the MAGIC gamma-ray burst GRB 190114C
Covino, S.; D'Avanzo, P.; Campana, S. +42 more
We observed GRB 190114C (redshift z = 0.4245), the first gamma-ray burst (GRB) ever detected at TeV energies, at optical and near-infrared wavelengths with several ground-based telescopes and the Hubble Space Telescope, with the primary goal of studying its underlying supernova, SN 2019jrj. The monitoring spanned the time interval between 1.3 and …
Ensemble Simulations of the 2012 July 12 Coronal Mass Ejection with the Constant-turn Flux Rope Model
Pogorelov, Nikolai V.; Arge, Charles N.; Singh, Talwinder +1 more
Flux-rope-based magnetohydrodynamic modeling of coronal mass ejections (CMEs) is a promising tool for prediction of the CME arrival time and magnetic field at Earth. In this work, we introduce a constant-turn flux rope model and use it to simulate the 2012 July 12 16:48 CME in the inner heliosphere. We constrain the initial parameters of this CME …
HyGAL: Characterizing the Galactic Interstellar Medium with Observations of Hydrides and Other Small Molecules. I. Survey Description and a First Look Toward W3(OH), W3 IRS5, and NGC 7538 IRS1
Menten, K. M.; Falgarone, E.; Godard, B. +23 more
The HyGAL Stratospheric Observatory for Infrared Astronomy legacy program surveys six hydride molecules-ArH+, OH+, H2O+, SH, OH, and CH-and two atomic constituents-C+ and O-within the diffuse interstellar medium (ISM) by means of absorption-line spectroscopy toward 25 bright Galactic backgroun…
Rapid build-up of the stellar content in the protocluster core SPT2349-56 at z = 4.3
Rennehan, Douglas; Greve, Thomas R.; Phadke, Kedar A. +22 more
The protocluster SPT2349-56 at $z = 4.3$ contains one of the most actively star-forming cores known, yet constraints on the total stellar mass of this system are highly uncertain. We have therefore carried out deep optical and infrared observations of this system, probing rest-frame ultraviolet to infrared wavelengths. Using the positions of the s…
Transit Hunt for Young and Maturing Exoplanets (THYME). VIII. A Pleiades-age Association Harboring Two Transiting Planetary Systems from Kepler
Vanderburg, Andrew; Kraus, Adam L.; Barber, Madyson G. +8 more
Young planets provide a window into the early stages and evolution of planetary systems. Ideal planets for such research are in coeval associations, where the parent population can precisely determine their ages. We describe a young association (MELANGE-3) in the Kepler field, which harbors two transiting planetary systems (KOI-3876 and Kepler-970…