Monitoring the radio emission of Proxima Centauri

  title={Monitoring the radio emission of Proxima Centauri},
  author={Miguel 'Angel P'erez-Torres and Jos'e F. G'omez and Jos{\'e} Luis Ortiz and Paolo Leto and Guillem Anglada and Jos'e Luis G'omez and E. Rodr'iguez and Corrado Trigilio and Pedro J. Amado and A. Alberdi and Guillem Anglada-Escud'e and Mayra Osorio and G. Umana and Z. M. Berdi{\~n}as and M. J. L'opez-Gonz'alez and Nicol{\'a}s Morales and Cristina Rodr'iguez-L'opez and James O. Chibueze},
  journal={Astronomy \& Astrophysics},
We present results from the most comprehensive radio monitoring campaign towards the closest star to our Sun, Proxima Centauri. We report 1.1–3.1 GHz observations with the Australia Telescope Compact Array over 18 consecutive days in April 2017. We detected radio emission from Proxima Centauri for most of the observing sessions, which spanned ~1.6 orbital periods of the planet Proxima b. The radio emission is stronger at the low-frequency band, centered around 1.6 GHz, and is consistent with… 

Detecting Magnetospheric Radio Emission from Giant Exoplanets

As radio astronomy enters a golden age, ground-based observatories are reaching sensitivities capable of unlocking a new and exciting field of exoplanet observation. Radio observation of planetary

MHD Study of Extreme Space Weather Conditions for Exoplanets With Earth‐Like Magnetospheres: On Habitability Conditions and Radio‐Emission

The present study aims at characterizing the habitability conditions of exoplanets with an Earth‐like magnetosphere inside the habitable zone of M and F stars, caused by the direct deposition of the

Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission

We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey. Due to

The Mouse That Squeaked: A Small Flare from Proxima Cen Observed in the Millimeter, Optical, and Soft X-Ray with Chandra and ALMA

We present millimeter, optical, and soft X-ray observations of a stellar flare with an energy squarely in the regime of typical X1 solar flares. The flare was observed from Proxima Cen on 2019 May 6

The Role of Interactions Between Stars and Their Planets

  • A. Lanza
  • Physics
    Demographics of Exoplanetary Systems
  • 2022

The TESS View of LOFAR Radio-emitting Stars

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 star. This would be

A scaling relationship for non-thermal radio emission from ordered magnetospheres: from the top of the main sequence to planets

In this paper, we present the analysis of incoherent non-thermal radio emission from a sample of hot magnetic stars, ranging from early-B to early-A spectral type. Spanning a wide range of stellar

Interior heating and outgassing of Proxima Centauri b: Identifying critical parameters

Context. Since the discovery of a potentially low-mass exoplanet around our nearest neighbour star Proxima Centauri, several works have investigated the likelihood of a shielding atmosphere and

GMRT Observations of the Exoplanetary Systems τ Boötis and 55 Cancri

We present archival Giant Metrewave Radio Telescope (GMRT) observations of two exoplanetary systems, τ Boötis, and 55 Cancri, at 610 MHz and 150 MHz, respectively. Theoretical models predict these

A Pilot Radio Search for Magnetic Activity in Directly Imaged Exoplanets

We present the first systematic search for GHz frequency radio emission from directly imaged exoplanets using Very Large Array observations of sufficient angular resolution to separate the planets



Confidence limits for small numbers of events in astrophysical data

The calculation of limits for small numbers of astronomical counts is based on standard equations derived from Poisson and binomial statistics; although the equations are straightforward, their

Namely, we assumed a Langmuir wave spectrum between the wavenumbers kmin = 2πνp/v1 and

  • 2001

The Astronomer’s Telegram

  • Aschwanden, M. J. 1990, A&AS,
  • 2017

Evidence for radio and X-ray auroral emissions from the magnetic B-type star ρ Oph A

We present new ATCA multiwavelength radio measurements (range 2.1-21.2 GHz) of the early-type magnetic star rho OphA, performed in 2019 March during three different observing sessions. These new ATCA

Coherent radio emission from a quiescent red dwarf indicative of star–planet interaction

Low-frequency ( ν  ≲ 150 MHz) stellar radio emission is expected to originate in the outer corona at heights comparable to and larger than the stellar radius. Such emission from the Sun has been used

Erratum: The fifth main-sequence magnetic B-type star showing coherent radio emission: Is this really a rare phenomenon?

We report the discovery of intense, highly directional radio emission from the Bp star HD 35298, which we interpret as the consequence of Electron Cyclotron Maser Emission (ECME). The star was

ASKAP detection of periodic and elliptically polarized radio pulses from UV Ceti

Active M dwarfs are known to produce bursty radio emission, and multiwavelength studies have shown that solar-like magnetic activity occurs in these stars. However, coherent bursts from active M

Statistical analysis of 26 yr of observations of decametric radio emissions from Jupiter

Jupiter is a complex and at the same time very powerful radio source in the decameter wavelength range. The emission is anisotropic, intrinsically variable at millisecond to hour timescales, and also