Complex Modulation of Rapidly Rotating Young M Dwarfs: Adding Pieces to the Puzzle

@article{Gunther2022ComplexMO,
  title={Complex Modulation of Rapidly Rotating Young M Dwarfs: Adding Pieces to the Puzzle},
  author={Maximilian N. Gunther and David A. Berardo and Elsa Ducrot and C. A. Murray and Keivan G. Stassun and Katalin Ol{\'a}h and Luke G. Bouma and Saul A. Rappaport and Joshua N. Winn and Adina D. Feinstein and Elisabeth C. Matthews and Daniel Sebastian and Benjamin V. Rackham and B{\'a}lint Seli and Amaury H. M. J. Triaud and Edward Gillen and Alan M. Levine and B-O. Demory and Micha{\"e}l Gillon and Didier Queloz and George R. Ricker and Roland K. Vanderspek and Sara Seager and David W. Latham and Jon M. Jenkins and Clara E. Brasseur and Knicole d. Col'on and T. Daylan and Laetitia Delrez and L. J. Garcia and Rahul Jayaraman and Emmanuel Jehin and Martti H. K. Kristiansen and J. M. Diederik Kruijssen and Peter P. Pedersen and Francisco J. Pozuelos and Joseph E. Rodriguez and Bill Wohler and Zhuchang Zhan},
  journal={The Astronomical Journal},
  year={2022},
  volume={163}
}
New sets of young M dwarfs with complex, sharp-peaked, and strictly periodic photometric modulations have recently been discovered with Kepler/K2 (scallop shells) and TESS (complex rotators). All are part of star-forming associations, are distinct from other variable stars, and likely belong to a unified class. Suggested hypotheses include starspots, accreting dust disks, corotating clouds of material, magnetically constrained material, spots and misaligned disks, and pulsations. Here, we… 
Rotation of Low-mass Stars in Upper Centaurus–Lupus and Lower Centaurus–Crux with TESS
We present stellar rotation rates derived from Transiting Exoplanet Survey Satellite (TESS) light curves for stars in Upper Centaurus–Lupus (UCL; ∼136 pc, ∼16 Myr) and Lower Centaurus–Crux (LCC; ∼115
The Visual Survey Group: A Decade of Hunting Exoplanets and Unusual Stellar Events with Space-based Telescopes
This article presents the history of the Visual Survey Group (VSG)—a Professional-Amateur (Pro-Am) collaboration within the field of astronomy working on data from several space missions (Kepler, K2
Development of the SPECULOOS exoplanet search project
TLDR
The current status of SPECULOOS is reviewed, its first results, the plans for its development, and its connection to the Transiting Exoplanet Survey Satellite (TESS) and JWST are reviewed.

References

SHOWING 1-10 OF 72 REFERENCES
More Rapidly Rotating PMS M Dwarfs with Light Curves Suggestive of Orbiting Clouds of Material
In a previous paper, using data from K2 Campaign 2, we identified 11 very low mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability and phased
Complex Rotational Modulation of Rapidly Rotating M Stars Observed with TESS
We have searched for short periodicities in the light curves of stars with Teff cooler than 4000 K made from 2-minute cadence data obtained in Transiting Exoplanet Survey Satellite sectors 1 and 2.
Probing the origin of stellar flares on M dwarfs using TESS data sectors 1–3
Detailed studies of the Sun have shown that sunspots and solar flares are closely correlated. Photometric data from Kepler/K2 has allowed similar studies to be carried out on other stars. Here, we
NGTS clusters survey – I. Rotation in the young benchmark open cluster Blanco 1
We determine rotation periods for 127 stars in the ∼115-Myr-old Blanco 1 open cluster using ∼200 d of photometric monitoring with the Next Generation Transit Survey. These stars span F5–M3 spectral
Orbiting Clouds of Material at the Keplerian Co-rotation Radius of Rapidly Rotating Low-mass WTTs in Upper Sco
Using K2 data, we identified 23 very-low-mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability not easily explained by well-established physical
Stellar Flares from the FirstTESSData Release: Exploring a New Sample of M Dwarfs
We perform a study of stellar flares for the 24,809 stars observed with 2 minute cadence during the first two months of the TESS mission. Flares may erode exoplanets’ atmospheres and impact their
The Hα Emission of Nearby M Dwarfs and its Relation to Stellar Rotation
The high-energy emission from low-mass stars is mediated by the magnetic dynamo. Although the mechanisms by which fully convective stars generate large-scale magnetic fields are not well understood,
HATS-3b: AN INFLATED HOT JUPITER TRANSITING AN F-TYPE STAR
We report the discovery by the HATSouth survey of HATS-3b, a transiting extrasolar planet orbiting a V = 12.4 F dwarf star. HATS-3b has a period of P = 3.5479 days, mass of Mp = 1.07 MJ, and radius
The Quest for Pulsating M Dwarf Stars
Recent fully non-adiabatic theoretical studies of M dwarf models show that they have the potential to excite radial\textbf{,} and low-order, low-degree non-radial modes, as well as solar-like
Superflares and variability in solar-type stars with TESS in the Southern hemisphere
Superflares on solar-type stars have been a rapidly developing field ever since the launch of Kepler. Over the years, there have been several studies investigating the statistics of these explosive
...
...