654 citations · 12.9k across the 278 of their papers we have counts for
18 papers · 1 filter
Occurrence rate of stellar Type II radio bursts from a 100 star-year search for coronal mass ejections
David C. Konijn, Harish K. Vedantham, Cyril Tasse +8
Coronal mass ejections (CMEs) are major drivers of space weather in the Solar System, but their occurrence rate on other stars is unknown. A characteristic (deca-)metric radio burs…
Radio Burst from a Stellar Coronal Mass Ejection
J. R. Callingham, C. Tasse, R. Keers +15
Coronal mass ejections (CMEs) are massive expulsions of magnetised plasma from a star, and are the largest contributors to space weather in the Solar System. CMEs are theorized to…
Unusual periodic modulation in the radio emission of the methane dwarf binary WISEP J101905.63+652954.2
Timothy W. H. Yiu, Harish K. Vedantham, Joseph R. Callingham +1
Brown dwarfs display Jupiter-like auroral phenomena, such as rotationally modulated electron cyclotron maser radio emission. Radio observations of cyclotron maser emission can be u…
Magnetic fields in planetary nebulae detected through non-thermal radio continuum emission
Marcin Hajduk, Timothy Shimwell, Glenn White +3
Context. Planetary nebulae are shells ejected by low- and intermediate-mass stars. The slow wind ejected by the asymptotic giant branch star is compressed by a fast stellar wind to…
Plausible association of distant late M dwarfs with low-frequency radio emission
A. J. Gloudemans, J. R. Callingham, K. J. Duncan +10
We present the serendipitous discovery of 8 distant ( 50 pc) late M dwarfs with plausible associated radio emission at 144 MHz. The M dwarf nature of our sources has been confir…
Polarised radio pulsations from a new T dwarf binary
H. K. Vedantham, Trent J. Dupuy, E. L. Evans +6
Brown dwarfs display Jupiter-like auroral phenomena such as magnetospheric H emission and coherent radio emission. Coherent radio emission is a probe of magnetospheric accelerat…
Peculiar radioX-ray relationship in active stars
H. K. Vedantham, J. R. Callingham, T. W. Shimwell +5
The empirical relationship between the non-thermal 5GHz radio luminosity and the soft X-ray luminosity of active stellar coronae, canonically called the Güdel-Benz relationship (Gü…
The TESS View of LOFAR Radio-Emitting Stars
Benjamin J. S. Pope, Joseph R. Callingham, Adina D. Feinstein +4
The recent detection of the M dwarf GJ 1151 at 144 MHz low radio frequencies using LOFAR has been interpreted as evidence of an exoplanet magnetically interacting with its host sta…
The population of M dwarfs observed at low radio frequencies
J. R. Callingham, H. K. Vedantham, T. W. Shimwell +12
Coherent low-frequency ( MHz) radio emission from stars encodes the conditions of the outer corona, mass-ejection events, and space weather. Previous low-frequency se…
Coherent radio emission from a population of RS Canum Venaticorum systems
S. E. B. Toet, H. K. Vedantham, J. R. Callingham +5
Coherent radio emission from stars can be used to constrain fundamental coronal plasma parameters, such as plasma density and magnetic field strength. It is also a probe of chromos…
Evidence for cold plasma in planetary nebulae from radio observations with the LOw Frequency ARray (LOFAR)
Marcin Hajduk, Marijke Haverkorn, Timothy Shimwell +6
We present observations of planetary nebulae with the LOw Frequency ARray (LOFAR) between 120 and 168 MHz. The images show thermal free-free emission from the nebular shells. We ha…
Large closed-field corona of WX UMa evidenced from radio observations
I. Davis, H. K. Vedantham, J. R. Callingham +5
The space-weather conditions that result from stellar winds significantly impact the habitability of exoplanets. The conditions can be calculated from first principles if the neces…
Low-frequency monitoring of flare star binary CR Draconis: Long-term electron-cyclotron maser emission
J. R. Callingham, B. J. S. Pope, A. D. Feinstein +12
Recently detected coherent low-frequency radio emission from M dwarf systems shares phenomenological similarities with emission produced by magnetospheric processes from the gas gi…
Differences in radio emission from similar M dwarfs in the binary system Ross 867-8
L. H. Quiroga-Nuñez, H. T. Intema, J. R. Callingham +5
Serendipitously, we have rediscovered radio emission from the binary system Ross 867 (M4.5V) and Ross 868 (M3.5V) while inspecting archival Giant Metrewave Radio Telescope (GMRT) o…
A pilot ASKAP survey of radio transient events in the region around the intermittent pulsar PSR J1107-5907
G. Hobbs, I. Heywood, M. E. Bell +75
We use observations from the Boolardy Engineering Test Array (BETA) of the Australian Square Kilometre Array Pathfinder (ASKAP) telescope to search for transient radio sources in t…
AMI radio continuum observations of young stellar objects with known outflows
AMI Consortium, :, Rachael E. Ainsworth +20
We present 16 GHz (1.9 cm) deep radio continuum observations made with the Arcminute Microkelvin Imager (AMI) of a sample of low-mass young stars driving jets. We combine these new…
Radio continuum observations of Class I protostellar disks in Taurus: constraining the greybody tail at centimetre wavelengths
Anna M. M. Scaife, Jane V. Buckle, Rachael E. Ainsworth +18
We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the…
AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Serpens region
Anna M. M. Scaife, Jennifer Hatchell, Rachael E. Ainsworth +18
We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Serpens molecular cloud by the Spitzer c2d programme at a wavel…