M. Sasaki
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View article: Discovery of a 9.67 s Pulsar in an Ultraluminous X-Ray Source in NGC 4631 with XMM-Newton
Discovery of a 9.67 s Pulsar in an Ultraluminous X-Ray Source in NGC 4631 with XMM-Newton Open
Thanks to a recent observation with XMM-Newton, we discovered periodic pulsations at P = 9.6652 ± 0.0002 s in a new ultraluminous X-ray source (ULX) in the galaxy NGC 4631. This source, dubbed as X−8, shows one of the largest spin-up rates…
View article: Discovery of a 9.67-s pulsar in an ultraluminous X-ray source in NGC 4631 with XMM-Newton
Discovery of a 9.67-s pulsar in an ultraluminous X-ray source in NGC 4631 with XMM-Newton Open
Thanks to a recent observation with XMM-Newton, we discovered periodic pulsations at P= 9.6652 +/- 0.0002 s in a new ultraluminous X-ray source (ULX) in the galaxy NGC 4631. This source, dubbed as X-8, shows one of the largest spin-up rate…
View article: Chandra Large Project Observations of the Supernova Remnant N132D: Measuring the Expansion of the Forward Shock
Chandra Large Project Observations of the Supernova Remnant N132D: Measuring the Expansion of the Forward Shock Open
We present results from the Chandra X-ray Observatory Large Project (878 ks in 28 observations) of the Large Magellanic Cloud supernova remnant N132D. We measure the expansion of the forward shock in the bright southern rim to be …
View article: Deep XMM-Newton observation reveals hot gaseous outflow in NGC 5746
Deep XMM-Newton observation reveals hot gaseous outflow in NGC 5746 Open
Context. We present a deep XMM-Newton observation of the massive, edge-on galaxy NGC 5746. The total exposure time of 250 ks provides unprecedented sensitivity to study the diffuse hot gas in the halo, significantly surpassing the depth of…
View article: Study of a giant Large Magellanic Cloud Supernova Remnant, Veliki (J0450.4-7050)
Study of a giant Large Magellanic Cloud Supernova Remnant, Veliki (J0450.4-7050) Open
We present a high-resolution radio-continuum view and a multi-frequency analysis of the Large Magellanic Cloud (LMC) Supernova Remnant (SNR) J0450.4-7050, which we give the nickname Veliki. These high-resolution observations reveal a large…
View article: The Role of Registered Dietitians in Cancer Palliative Care: Responsibilities, Challenges, and Interdisciplinary Collaboration—A Cross-Sectional Survey
The Role of Registered Dietitians in Cancer Palliative Care: Responsibilities, Challenges, and Interdisciplinary Collaboration—A Cross-Sectional Survey Open
Registered dietitians (RDs) in palliative care help maintain patients’ quality of life by providing personalized nutritional support that alleviates eating-related distress. This study aimed to clarify the role of RDs in palliative care by…
View article: Teleios (G305.4-2.2) -- the mystery of a perfectly shaped new Galactic supernova remnant
Teleios (G305.4-2.2) -- the mystery of a perfectly shaped new Galactic supernova remnant Open
We present the serendipitous radio-continuum discovery of a likely Galactic supernova remnant (SNR) G305.4-2.2. This object displays a remarkable circular symmetry in shape, making it one of the most circular Galactic SNRs known. Nicknamed…
View article: ASKAP and VLASS Search for a Radio-continuum Counterpart of Ultra-high-energy Neutrino Event KM3–230213A
ASKAP and VLASS Search for a Radio-continuum Counterpart of Ultra-high-energy Neutrino Event KM3–230213A Open
We present the results of an Australian Square Kilometre Array Pathfinder (ASKAP) 944 MHz and Very Large Array Sky Survey (VLASS) 3 GHz search for a radio-continuum counterpart of the recent ultra-high-energy neutrino event, KM3–230213A. U…
View article: ASKAP and VLASS search for a radio-continuum counterpart of ultra-high-energy neutrino event KM3-230213A
ASKAP and VLASS search for a radio-continuum counterpart of ultra-high-energy neutrino event KM3-230213A Open
We present the results of an Australian Square Kilometre Array Pathfinder (ASKAP) 944 MHz and Very Large Array Sky Survey (VLASS) 3~GHz search for a radio-continuum counterpart of the recent ultra-high-energy (UHE) neutrino event, KM3-2302…
View article: <i>eROSITA</i> X-ray analysis of the PeVatron candidate Westerlund 1
<i>eROSITA</i> X-ray analysis of the PeVatron candidate Westerlund 1 Open
Context. It is still unclear which fraction of cosmic rays above an energy of 1 PeV is accelerated by the observed Galactic PeVatron population. These sources of unknown physical origin are detected through their γ -ray emission, which als…
View article: eROSITA X-ray Analysis of the PeVatron Candidate Westerlund 1
eROSITA X-ray Analysis of the PeVatron Candidate Westerlund 1 Open
It is unclear which fraction of cosmic rays above an energy of 1 PeV is accelerated by the observed Galactic PeVatron population. These sources' gamma-ray data is typically degenerate between hadronic and leptonic emission scenarios, which…
View article: A new radio continuum study of the large magellanic cloud supernova remnant MC SNR J0519–6902
A new radio continuum study of the large magellanic cloud supernova remnant MC SNR J0519–6902 Open
We present a new radio continuum study of the Large Magellanic Cloud supernova remnant (SNR) MC SNR J0519–6902. With a diameter of $\sim$ 8 pc, this SNR shows a radio ring-like morphology with three bright regions towards the north, east, …
View article: Stingrays in the radio sky: Two unusual diffuse radio relic sources in the direction of the Magellanic Stream
Stingrays in the radio sky: Two unusual diffuse radio relic sources in the direction of the Magellanic Stream Open
We present the discovery of two extended, low surface-brightness radio continuum sources, each consisting of a near-circular body and an extended tail of emission, nicknamed Stingray 1 (ASKAP J0129–5350) and Stingray 2 (ASKAP J0245–5642). …
View article: Teleios (G305.4–2.2) – the mystery of a perfectly shaped new galactic supernova remnant
Teleios (G305.4–2.2) – the mystery of a perfectly shaped new galactic supernova remnant Open
We present the serendipitous radio-continuum discovery of a likely Galactic supernova remnant (SNR) G305.4–2.2. This object displays a remarkable circular symmetry in shape, making it one of the most circular Galactic SNRs known. Nicknamed…
View article: X-Ray emission from SN1885A
X-Ray emission from SN1885A Open
The historical supernova (SN) S Andromedae (S And or SN1885A) in the Andromeda Galaxy (M31) was discovered in August 1885 and since then has been studied extensively in multi-wavelength observations. Although the remnant of S And could be …
View article: Evolutionary map of the Universe: Detection and analysis of the shell surrounding the runaway Wolf-Rayet star WR16
Evolutionary map of the Universe: Detection and analysis of the shell surrounding the runaway Wolf-Rayet star WR16 Open
We present the first radio–continuum detection of the circumstellar shell around the well-known WN8 type Wolf-Rayet star WR16 at 943.5 MHz using the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU…
View article: Supernova remnants on the outskirts of the Large Magellanic Cloud
Supernova remnants on the outskirts of the Large Magellanic Cloud Open
When a star dies, it can explode in a supernova, causing a strong shock wave and forming an interstellar object called a supernova remnant (SNR). Observational studies of SNRs allow us to learn about the different types of progenitors, the…
View article: The first all-sky survey of star-forming galaxies with eROSITA
The first all-sky survey of star-forming galaxies with eROSITA Open
Context. In this work, we present the results from a study of X-ray normal galaxies, that is, galaxies not harbouring active galactic nuclei (AGN), using data from the first complete all-sky scan of the eROSITA X-ray survey (eRASS1) obtain…
View article: First study of the supernova remnant population in the Large Magellanic Cloud with eROSITA
First study of the supernova remnant population in the Large Magellanic Cloud with eROSITA Open
Aims . The all-sky survey carried out by the extended Roentgen Survey with an Imaging Telescope Array (eROSITA) on board Spektrum-Roentgen-Gamma (Spektr-RG, SRG) has provided spatially and spectrally resolved X-ray data of the entire Large…
View article: Discovery of Perun (G329.9−0.5): a new, young, Galactic SNR
Discovery of Perun (G329.9−0.5): a new, young, Galactic SNR Open
We present the discovery of possibly the youngest Galactic supernova remnant (SNR) with associated pulsar-wind nebula (PWN), which we name Perun (G329.9−0.5). Perun was serendipitously discovered in the Australian Square Kilometre Array Pa…
View article: Unveiling the Physics of Core-Collapse Supernovae with the Line Emission Mapper: Observing Cassiopeia A
Unveiling the Physics of Core-Collapse Supernovae with the Line Emission Mapper: Observing Cassiopeia A Open
(Abridged) Core-collapse supernova remnants (SNRs) display complex morphologies and asymmetries, reflecting anisotropies from the explosion and early interactions with the circumstellar medium (CSM). Spectral analysis of these remnants can…
View article: A new understanding of the Gemini-Monoceros X-ray enhancement from discoveries with eROSITA
A new understanding of the Gemini-Monoceros X-ray enhancement from discoveries with eROSITA Open
Aims. The Gemini-Monoceros X-ray enhancement is a rich field for studying diffuse X-ray emission and supernova remnants (SNRs). Most SNRs in this part of the sky are notoriously difficult to observe due to their large extent. With the laun…
View article: Morphometry on the sphere: Cartesian and irreducible Minkowski tensors explained and implemented
Morphometry on the sphere: Cartesian and irreducible Minkowski tensors explained and implemented Open
Minkowski tensors are comprehensive shape descriptors that robustly capture n -point information in complex random geometries and that have already been extensively applied in the Euclidean plane. Here, we devise a framework for Minkowski …
View article: Type 2 Diabetes Mellitus Is a Risk Factor for Skeletal Muscle Loss in the Course of Dietary Treatment for Patients with Metabolic Dysfunction-associated Steatotic Liver Disease
Type 2 Diabetes Mellitus Is a Risk Factor for Skeletal Muscle Loss in the Course of Dietary Treatment for Patients with Metabolic Dysfunction-associated Steatotic Liver Disease Open
Objective This study assessed the impact of dietary therapy and reduced body weight on the loss of skeletal muscle in patients with metabolic dysfunction-associated steatotic liver disease (MASLD). Methods This was a single-center retrospe…
View article: eROSITA narrowband maps at the energies of soft X-ray emission lines
eROSITA narrowband maps at the energies of soft X-ray emission lines Open
Hot plasma plays a crucial role in regulating the baryon cycle within the Milky Way, flowing from the energetic sources in the Galactic center and plane, to the corona and the halo. This hot plasma represents an important fraction of the G…
View article: A look at the high energy aspects of the supernova remnant G309.8+00.0 with eROSITA and Fermi-LAT
A look at the high energy aspects of the supernova remnant G309.8+00.0 with eROSITA and Fermi-LAT Open
Supernova remnant (SNR) detection along the Galactic plane poses a number of challenges. The SNR G309.8+00.0 lies exactly on the Galactic plane, with its center coinciding with galactic latitude (b)=0 deg. In this paper we report the first…
View article: A look at the high energy aspects of the supernova remnant G309.8+00.0 with eROSITA and <i>Fermi</i>-LAT
A look at the high energy aspects of the supernova remnant G309.8+00.0 with eROSITA and <i>Fermi</i>-LAT Open
Supernova remnant (SNR) detection along the Galactic plane poses a number of challenges. A diffuse X-ray emission component emanating from unidentified sources on the Galactic plane further complicates such a detection in X-rays. Due to th…
View article: Study of X-ray emission from the S147 nebula by SRG/eROSITA: Supernova-in-the-cavity scenario
Study of X-ray emission from the S147 nebula by SRG/eROSITA: Supernova-in-the-cavity scenario Open
The Simeis 147 nebula (S147) is particularly well known for a spectacular net of H α -emitting filaments. It is often considered one of the largest and oldest (∼10 5 yr) cataloged supernova remnants in the Milky Way, although the kinematic…
View article: Study of X-ray emission from the S147 nebula with SRG/eROSITA: X-ray imaging, spectral characterization, and a multiwavelength picture
Study of X-ray emission from the S147 nebula with SRG/eROSITA: X-ray imaging, spectral characterization, and a multiwavelength picture Open
Simeis 147 (S147, G180.0-01.7, “Spaghetti nebula”) is a supernova remnant (SNR) extensively studied across the entire electromagnetic spectrum, from radio to giga-electronvolt γ -rays, except in X-rays. Here, we report the first detection …
View article: Morphological Evidence for the eROSITA Bubbles Being Giant and Distant Structures
Morphological Evidence for the eROSITA Bubbles Being Giant and Distant Structures Open
There are two contradictory views of the eROSITA bubbles: either a 10 4 pc scale pair of giant bubbles blown by the Galactic center (GC), or a 10 2 pc scale local structure coincidentally located in the direction of GC. A key element of th…