Results 51 to 60 of about 165 (125)

A Radio Counterpart to a Jupiter-mass Binary Object in Orion

open access: yesThe Astrophysical Journal Letters
Using James Webb Space Telescope near-infrared data of the inner Orion Nebula, Pearson & McCaughrean detected 40 Jupiter-mass binary objects (JuMBOs).
Luis F. Rodríguez   +2 more
doaj   +1 more source

Review of asteroid, meteor, and meteorite‐type links

open access: yesMeteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.
Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens   +1 more
wiley   +1 more source

Radio Astrometry Using Connected-Element Interferometers [PDF]

open access: yesSymposium - International Astronomical Union, 1974
The basic techniques of conventional radio interferometry are explained and a review given of the achievements and limitations of the methods as applied to radio astrometry.
openaire   +1 more source

HAWC J0630+186 Could Not Be Powered by PSR J0630+19

open access: yesThe Astrophysical Journal
3HWC J0630+186 is one of the very-high-energy gamma-ray sources listed in the third High-Altitude Water Cherenkov catalog; however, its origin remains unidentified.
Bojun Wang   +4 more
doaj   +1 more source

The Celestial Reference Frame at K Band: Imaging. I. The First 28 Epochs

open access: yesThe Astronomical Journal, 2023
We present K -band (24 GHz) images of 731 compact extragalactic radio sources with submilliarcsecond resolution, based on radio interferometric observations made with the Very Long Baseline Array of 10 telescopes during 29 day long sessions spanning from
Aletha de Witt   +6 more
doaj   +1 more source

Isolated Neutron Stars as Science Validation for XMM2ATHENA: Ensuring Robust Data for Future X‐Ray Astronomy

open access: yesAstronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT The discovery of radio‐quiet, x‐ray thermally emitting isolated neutron stars (XINSs) in the ROSAT All‐Sky Survey revealed a previously overlooked component of the neutron star population. Advancements in x‐ray instrumentation and the availability of deep, wide‐area optical surveys now enable us to explore XINSs at fainter x‐ray fluxes and ...
Adriana Mancini Pires   +11 more
wiley   +1 more source

A Study of Real-time Detection Methods for Solar Radio Burst Identification

open access: yesThe Astrophysical Journal Supplement Series
Solar flares, coronal mass ejections, and other solar radio burst phenomena release substantial amounts of solar radiation energy, resulting in adverse space weather conditions and posing significant hazards in space. Spectrum analysis conducted manually
YongLin Yu   +6 more
doaj   +1 more source

Constraints on the Persistent Radio Source Associated with FRB 20190520B Using the European VLBI Network

open access: yesThe Astrophysical Journal Letters, 2023
We present very long baseline interferometry (VLBI) observations of a continuum radio source potentially associated with the fast radio burst source FRB 20190520B.
Shivani Bhandari   +9 more
doaj   +1 more source

Multi‐Instrument and SAMI3‐TIDAS Data Assimilation Analysis of Three‐Dimensional Ionospheric Electron Density Variations During the April 2024 Total Solar Eclipse

open access: yesJournal of Geophysical Research: Space Physics, Volume 129, Issue 9, September 2024.
Abstract This paper conducts a multi‐instrument and data assimilation analysis of the three‐dimensional ionospheric electron density responses to the total solar eclipse on 08 April 2024. The altitude‐resolved electron density variations over the continental US and adjacent regions are analyzed using the Millstone Hill incoherent scatter radar data ...
Ercha Aa   +7 more
wiley   +1 more source

An Unusual Pulse Shape Change Event in PSR J1713+0747 Observed with the Green Bank Telescope and CHIME

open access: yesThe Astrophysical Journal
The millisecond pulsar J1713+0747 underwent a sudden and significant pulse shape change between 2021 April 16 and 17 (MJDs 59320 and 59321). Subsequently, the pulse shape gradually recovered over the course of several months.
Ross J. Jennings   +43 more
doaj   +1 more source

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