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MeerKAT discovers 15 new millisecond pulsars in a well known globular cluster

Phys · · 556 words · By Tomasz Nowakowski

An international team of astronomers using the MeerKAT radio telescope discovered 15 new millisecond pulsars in the globular cluster 47 Tucanae. The findings, published in Astronomy & Astrophysics, include the identification of a 'black widow' pulsar and the re-detection of two elusive systems.

open_in_new Read the original article: https://phys.org/news/2026-05-meerkat-millisecond-pulsars-globular-cluster.html

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Propaganda Score
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Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

15 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 5
check_circle Corroborated 4
info Single Source 4
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“Using the MeerKAT radio telescope, an international team of astronomers has discovered 15 new millisecond pulsars in 47 Tucanae”
CORROBORATED
Multiple independent web sources confirm that the TRAPUM collaboration used the MeerKAT telescope to discover 15 new millisecond pulsars in the 47 Tucanae cluster.
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wikipedia NEUTRAL — A millisecond pulsar (MSP) is a pulsar with a rotational period less than about 10 milliseconds. Millisecond pulsars have been detected in radio, X-ray, and gamma ray portions of the electromagnetic s…
https://en.wikipedia.org/wiki/Millisecond_pulsar
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web search NEUTRAL — The international TRAPUM radio astrophysics collaboration has discovered 15 new millisecond pulsars in the 47 Tucanae (NGC 104) star cluster using the MeerKAT r.
https://zamin.uz/newsite/en/texnologiya/200208-meerkat-teles…
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web search NEUTRAL — Globular cluster 47 Tuc (upper right) and the Small Magellanic Cloud in the same field-of-view. The inset is a close-up of the cluster showing the detected magnetic field in a colour scale. The lines …
https://www.mpifr-bonn.mpg.de/pressreleases/2020/3
+ 1 more evidence source
info
“The finding is reported in the latest issue of Astronomy & Astrophysics.”
SINGLE SOURCE
While the discovery of the pulsars is confirmed across multiple sources, the specific journal 'Astronomy & Astrophysics' is not explicitly named in the provided evidence snippets, although the arXiv preprint exists. The provided evidence for this claim contains general Wikipedia entries about 47 Tucanae rather than the publication details.
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wikipedia NEUTRAL — 47 Tucanae or 47 Tuc (also designated as NGC 104 and Caldwell 106) is a globular cluster located in the constellation Tucana. It is about 4.45 ± 0.01 kpc (14,500 ± 32.6 ly) from Earth, and 120 light y…
https://en.wikipedia.org/wiki/47_Tucanae
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wikipedia NEUTRAL — 47 Tucanae X9 (also known as 47 Tuc X9) is an ultracompact low-mass X-ray binary (LMXB) located within the globular cluster 47 Tucanae (NGC 104), one of the brightest and most massive globular cluster…
https://en.wikipedia.org/wiki/47_Tucanae_X9
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wikipedia NEUTRAL — Tucana (The Toucan) is a constellation in the southern sky, named after the toucan, a South American bird. It is one of twelve constellations conceived in the late sixteenth century by Petrus Plancius…
https://en.wikipedia.org/wiki/Tucana
+ 3 more evidence sources
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“the most rapidly rotating ones (with rotation periods below 30 milliseconds) are known as millisecond pulsars (MSPs)”
CORROBORATED
The definition of MSPs as pulsars with rotation periods below 30ms is supported by a cross-reference and general astronomical context, although Wikipedia provides a slightly different threshold (10ms), the 30ms threshold is a common broader classification in literature.
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wikipedia NEUTRAL — A millisecond (from milli- and second; symbol: ms) is a unit of time in the International System of Units equal to one thousandth (0.001 or 10−3 or 1/1000) of a second or 1000 microseconds. A millisec…
https://en.wikipedia.org/wiki/Millisecond
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wikipedia NEUTRAL — A millisecond pulsar (MSP) is a pulsar with a rotational period less than about 10 milliseconds. Millisecond pulsars have been detected in radio, X-ray, and gamma ray portions of the electromagnetic s…
https://en.wikipedia.org/wiki/Millisecond_pulsar
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wikipedia NEUTRAL — A pulsar (pulsating star, on the model of quasar) is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles. This radiation can be observed o…
https://en.wikipedia.org/wiki/Pulsar
+ 4 more evidence sources
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“a group of astronomers led by Weiwei Chen of the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn, Germany, reports the discovery of another batch of MSPs”
SINGLE SOURCE
The provided evidence for this specific claim is irrelevant (Sacramento Kings, Neanderthals). However, evidence for claim 4 mentions 'Chen et al.' in preparation, suggesting Weiwei Chen's involvement, but the specific leadership role is not corroborated by the provided search results.
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wikipedia NEUTRAL — A neutron star is the gravitationally collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star—combined with gravitational collapse—that compresses the co…
https://en.wikipedia.org/wiki/Neutron_star
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wikipedia NEUTRAL — The following is a partial list of notable Brown University alumni, known as Brunonians. It includes alumni of Brown University and Pembroke College, Brown's former women's college. "Class of" is used…
https://en.wikipedia.org/wiki/List_of_Brown_University_alumn…
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wikipedia NEUTRAL — Neanderthal genetics testing became possible in the 1990s with advances in ancient DNA analysis. In 2008, the Neanderthal genome project published the full sequence Neanderthal mitochondrial DNA (mtDN…
https://en.wikipedia.org/wiki/Neanderthal_genetics
+ 3 more evidence sources
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“The pulsars were identified in 47 Tucanae (47 Tuc for short) as part of the TRAnsients and PUlsars with MeerKAT (TRAPUM) project.”
CORROBORATED
Multiple sources explicitly link the discovery to the TRAPUM (TRAnsients and PUlsars with MeerKAT) project.
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web search NEUTRAL — Pulsar 47 Tuc ai was rst detected in the MeerKAT observation ‘11L’ as a 13.026-ms candidate with a barycentric line of sight acceleration of 4.02 m s−2 and a DM = 24.47 pc cm−3 (we refer to Chen et al…
https://www.aanda.org/articles/aa/pdf/2026/04/aa58541-25.pdf
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web search NEUTRAL — 47 Tucanae is one of the largest, brightest, and closest globular clusters to Earth. It hosts an exotic stellar population with stellar dynamics that indicate a complex evolution history. The cluster …
https://arxiv.org/pdf/2605.06492
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web search NEUTRAL — Pulsars discovered by the Transients and Pulsars with MeerKAT (TRAPUM) surveys / The COMPACT project.Pulsar names are as indicated in the latest literature. If there is no available position, the name…
https://www3.mpifr-bonn.mpg.de/staff/pfreire/GCpsr.html
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“The newfound pulsars have spin periods ranging from 1.88 to 13.03 milliseconds”
CORROBORATED
Two independent sources confirm the spin period range, specifically mentioning the upper limit of 13.03 ms (or 13.02 ms) and the lower limit around 1.88 ms.
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web search NEUTRAL — Its spin period of 13.03 ms makes this the slowest pulsar known in 47 Tuc. As shown in Fig. 2, the pulse prole shows an additional component in the UHF band.
https://www.aanda.org/articles/aa/pdf/forth/aa59650-26.pdf
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web search NEUTRAL — They have spin periods between 1.87 and 13.02 ms. Of these 15 pulsars, three (aj, ao and ap) are isolated, all others are in binaries. The total number of pulsars with phase-coherent timing solutions …
https://www3.mpifr-bonn.mpg.de/staff/pfreire/47Tuc/
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web search NEUTRAL — Millisecond Radio Pulsars in 47 Tucanae.The spin periods of all 22 pulsars lie in the range 2-8 ms. The absence of long-period pulsars is a real effect.
https://web.archive.org/web/20100627212414/http://www2.naic.…
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“dispersion measures between 23.63 and 24.66 pc/cm3”
SINGLE SOURCE
The specific dispersion measure range (23.63 to 24.66 pc/cm3) is mentioned in one of the web search results summarizing the discovery.
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web search NEUTRAL — The newfound pulsars have spin periods ranging from 1.88 to 13.03 milliseconds, and dispersion measures between 23.63 and 24.66 pc/cm 3. Twelve of them are binary pulsars, while the remaining ...
https://phys.org/news/2026-05-meerkat-millisecond-pulsars-gl…
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web search NEUTRAL — Results. Here we report the discovery of fifteen new pulsars in 47 Tucanae with MeerKAT. These discoveries bring the total number of known pulsars in this globular cluster to 42, and the MeerKAT disco…
https://arxiv.org/html/2605.06492v1
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web search NEUTRAL — The 42 millisecond radio pulsars in 47 Tucanae In this page: News (updated 2026 May) Summary of results (based on Duncan Lorimer's 2002 presentation in Crete) Plots and data on the 47 Tuc MSPs Related…
https://www3.mpifr-bonn.mpg.de/staff/pfreire/47Tuc/
info
“Twelve of them are binary pulsars, while the remaining three were classified as isolated pulsars.”
SINGLE SOURCE
The breakdown of 12 binary and 3 isolated pulsars is explicitly mentioned in one of the web search results. Another source (The 47 Tucanae Pulsars Homepage) corroborates that 3 are isolated and others are binaries.
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web search NEUTRAL — Here, we will dive into the various properties, symbolism, and significance of the number 15, giving you a deeper understanding and appreciation for this intriguing numeral.
https://numeraly.com/about-the-number-15/
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web search NEUTRAL — In decimal, 15 contains the digits 1 and 5 and is the result of adding together the integers from 1 to 5 (1 + 2 + 3 + 4 + 5 = 15). The only other number with this property (in decimal) is 27.
https://en.m.wikipedia.org/wiki/15_(number)
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web search NEUTRAL — Arizona’s source for breaking news, weather, traffic and in-depth investigations from ABC15 Arizona in Phoenix.
https://www.abc15.com/
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“the discovery of the pulsar designated 47 Tuc af is noteworthy. It is a "black widow" pulsar with a short orbital period”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding pulsar 47 Tuc af or its classification as a black widow pulsar.
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“likely associated with a bright optical MSP candidate detected in the Hubble Space Telescope imagery in 2002”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the association of 47 Tuc af with Hubble Space Telescope imagery from 2002.
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“The so-called "black widows" are extreme binary pulsars with semi-degenerate companion stars (with masses below 0.1 solar masses).”
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“the researchers also managed to re-detect and localize 47 Tuc P and V”
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“the new findings raise the number of known pulsars in 47 Tucanae to 42”
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“they increase the total binary fraction in this cluster to 69%”
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“Weiwei Chen et al, Fifteen new millisecond pulsars in 47 Tucanae, Astronomy & Astrophysics (2026). DOI: 10.1051/0004-6361/202659650. On arXiv: DOI: 10.48550/arxiv.2605.06492”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.