activity
20202026
most citedMonitoring the large-scale magnetic field of AD~Leo with SPIRou, ESPaDOnS and Narval. Toward a magnetic polarity reversal?

35 citations · 179 across the 31 of their papers we have counts for

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Showing 2023Show all

7 papers · 1 filter

astro-ph.SR2023

The EBLM Project XI. Mass, radius and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS

M. I. Swayne, P. F. L. Maxted, A. H. M. J. Triaud +104

Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ``radius inflat…

astro-ph.EP2023★ 19 cited

The SOPHIE search for northern extrasolar planets-XIX. A system including a cold sub-Neptune potentially transiting a V = 6.5 star HD88986

N. Heidari, I. Boisse, N. C. Hara +51

Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ planets discovered so far. The lack of discoveries of this population poses a challenge…

astro-ph.SR2023

SPIRou reveals unusually strong magnetic fields of slowly rotating M dwarfs

L. T. Lehmann, J. -F. Donati, P. Fouque +8

In this paper, we study six slowly rotating mid-to-late M~dwarfs (rotation period ) by analysing spectropolarimetric data collected wi…

astro-ph.SR2023

Measuring small-scale magnetic fields of 44 M dwarfs from SPIRou spectra with ZeeTurbo

P. I. Cristofari, J. -F. Donati, C. Moutou +11

We present the results of an analysis aimed at probing the small-scale magnetic fields of M dwarfs observed with SPIRou, the nIR high-resolution spectro-polarimeter installed at th…

astro-ph.SR2023★ 7 cited

Correlations between laboratory line lists for FeH, CrH, and NiH and M-star spectra collected with ESPaDOnS and SPIRou

P. Crozet, J. Morin, A. J. Ross +9

Molecular bands of metal oxides and hydrides dominate the optical and near-infrared spectra of M dwarfs. High-resolution spectra of these bands have immense potential for determini…

astro-ph.SR2023★ 28 cited

Monitoring the young planet host V1298 Tau with SPIRou: planetary system and evolving large-scale magnetic field

B. Finociety, J. -F. Donati, P. I. Cristofari +15

We report results of a spectropolarimetric monitoring of the young Sun-like star V1298~Tau based on data collected with the near-infrared spectropolarimeter SPIRou at the Canada-Fr…

astro-ph.SR2023★ 35 cited

Monitoring the large-scale magnetic field of AD~Leo with SPIRou, ESPaDOnS and Narval. Toward a magnetic polarity reversal?

S. Bellotti, J. Morin, L. T. Lehmann +23

One manifestation of dynamo action on the Sun is the 22-yr magnetic cycle, exhibiting a polarity reversal and a periodic conversion between poloidal and toroidal fields. For M dwar…