Deborah Jarvis
YOU?
Author Swipe
View article: SN 2024cld: unveiling the complex mass-loss histories of evolved supergiant progenitors to core collapse supernovae
SN 2024cld: unveiling the complex mass-loss histories of evolved supergiant progenitors to core collapse supernovae Open
Pre-explosion mass loss in supernova (SN) progenitors is a crucial unknown factor in stellar evolution, yet has been illuminated recently by the diverse zoo of interacting transients. We present SN 2024cld, a transitional core-collapse SN …
View article: SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae
SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae Open
Type Iax supernovae (SNe Iax) are one of the most common subclasses of thermonuclear supernova and yet their sample size, particularly those observed shortly after explosion, remains relatively small. In this paper, we present photometric …
View article: Constraints on an optical counterpart for the long-period radio transient GPM J1839-10
Constraints on an optical counterpart for the long-period radio transient GPM J1839-10 Open
Long period radio transients (LPTs) are periodic radio sources showing pulsed emission on timescales from minutes to hours. The underlying sources behind this emission are currently unclear. There are two leading candidates: neutron stars …
View article: Constraints on an optical counterpart for the long-period radio transient GPM J1839−10
Constraints on an optical counterpart for the long-period radio transient GPM J1839−10 Open
Long-period radio transients (LPTs) are periodic radio sources showing pulsed emission on time-scales from minutes to hours. The underlying sources behind this emission are currently unclear. There are two leading candidates: neutron stars…
View article: A Sibling of AR Scorpii: SDSS J230641.47+244055.8 and the Observational Blueprint of White Dwarf Pulsars
A Sibling of AR Scorpii: SDSS J230641.47+244055.8 and the Observational Blueprint of White Dwarf Pulsars Open
Radio pulsating white dwarf (WD) systems, known as WD pulsars, are binary systems where the rapidly spinning WD interacts with a low-mass companion, producing pulsed non-thermal emission observed across the entire electromagnetic spectrum.…
View article: In Utero MR Imaging for Fetuses with Small Head Sizes without Intracranial Abnormalities Detected on Ultrasonography
In Utero MR Imaging for Fetuses with Small Head Sizes without Intracranial Abnormalities Detected on Ultrasonography Open
There is a high detection rate of intracranial abnormalities on iuMRI of fetuses with small head sizes (10.5%). In most cases, the intracranial abnormalities shown on iuMRI brought about a change in prognosis. There was an increased risk o…
View article: A Sibling of AR Scorpii: SDSS J230641.47$+$244055.8 and the Observational Blueprint of White Dwarf Pulsars
A Sibling of AR Scorpii: SDSS J230641.47$+$244055.8 and the Observational Blueprint of White Dwarf Pulsars Open
Radio pulsating white dwarf (WD) systems, known as WD pulsars, are non-accreting binary systems where the rapidly spinning WD interacts with a low-mass companion producing pulsed non-thermal emission that can be observed across the entire …
View article: SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae
SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae Open
Type Iax supernovae (SNe Iax) are one of the most common subclasses of thermonuclear supernova and yet their sample size, particularly those observed shortly after explosion, remains relatively small. In this paper we present photometric a…
View article: A targeted search for binary white dwarf pulsars using <i>Gaia</i> and WISE
A targeted search for binary white dwarf pulsars using <i>Gaia</i> and WISE Open
After its discovery in 2016, the white dwarf binary AR Scorpii (AR Sco) remained for several years the only white dwarf system to show pulsed radio emission associated with a fast-spinning white dwarf. The evolutionary origin and the emiss…
View article: Two almost planetary mass survivors of common envelope evolution
Two almost planetary mass survivors of common envelope evolution Open
White dwarfs are often found in close binaries with stellar or even substellar companions. It is generally thought that these compact binaries form via common envelope evolution, triggered by the progenitor of the white dwarf expanding aft…
View article: <i>Kilonova Seekers</i>: the GOTO project for real-time citizen science in time-domain astrophysics
<i>Kilonova Seekers</i>: the GOTO project for real-time citizen science in time-domain astrophysics Open
Time-domain astrophysics continues to grow rapidly, with the inception of new surveys drastically increasing data volumes. Democratized, distributed approaches to training sets for machine learning classifiers are crucial to make the most …
View article: Sex differences in fetal intracranial volumes assessed by in utero MR imaging
Sex differences in fetal intracranial volumes assessed by in utero MR imaging Open
Background: The primary aim of the study is to test the null hypothesis that there are no statistically significant differences in intracranial volumes between male and female fetuses. Furthermore, we have studied the symmetry of the cereb…
View article: Single-Input Multi-Output U-Net for Automated 2D Foetal Brain Segmentation of MR Images
Single-Input Multi-Output U-Net for Automated 2D Foetal Brain Segmentation of MR Images Open
In this work, we develop the Single-Input Multi-Output U-Net (SIMOU-Net), a hybrid network for foetal brain segmentation inspired by the original U-Net fused with the holistically nested edge detection (HED) network. The SIMOU-Net is simil…
View article: MRI in the diagnosis of fetal developmental brain abnormalities: the MERIDIAN diagnostic accuracy study
MRI in the diagnosis of fetal developmental brain abnormalities: the MERIDIAN diagnostic accuracy study Open
Background Ultrasonography has been the mainstay of antenatal screening programmes in the UK for many years. Technical factors and physical limitations may result in suboptimal images that can lead to incorrect diagnoses and inaccurate cou…
View article: An integrated in utero MR method for assessing structural brain abnormalities and measuring intracranial volumes in fetuses with congenital heart disease: results of a prospective case-control feasibility study
An integrated in utero MR method for assessing structural brain abnormalities and measuring intracranial volumes in fetuses with congenital heart disease: results of a prospective case-control feasibility study Open
We have shown that it is possible to perform detailed 2D and 3D studies using iuMR that allow thorough investigation of all intracranial compartments in fetuses with CHD in a clinically appropriate scan time. Those fetuses have a high risk…
View article: Magnetic Resonance Imaging to Enhance the Diagnosis of Fetal Brain Abnormalities in utero
Magnetic Resonance Imaging to Enhance the Diagnosis of Fetal Brain Abnormalities in utero Open
Purpose
\nThis thesis aims to determine the diagnostic performance of in utero MR (iuMR) imaging to diagnose fetal brain abnormalities and describes the development, application and processing of a 3D volume MR acquisition.
\n
\nMethods
\n…
View article: Demonstration of Normal and Abnormal Fetal Brains Using 3D Printing from In Utero MR Imaging Data
Demonstration of Normal and Abnormal Fetal Brains Using 3D Printing from In Utero MR Imaging Data Open
3D printing is a new manufacturing technology that produces high-fidelity models of complex structures from 3D computer-aided design data. Radiology has been particularly quick to embrace the new technology because of the wide access to 3D…
View article: In Utero MR Imaging of Fetal Holoprosencephaly: A Structured Approach to Diagnosis and Classification
In Utero MR Imaging of Fetal Holoprosencephaly: A Structured Approach to Diagnosis and Classification Open
Our results show that in utero MR imaging has a major role in diagnosing or refuting a diagnosis of fetal holoprosencephaly made on ultrasonography. In utero MR imaging also assists in grading the severity of fetal holoprosencephaly.