Gaia Data Release 3. Rotational modulation and patterns of colour variations in solar-like variables

Abstract

The Gaia third Data Release (DR3) presents a catalogue of 474\,026 stars with variability induced by magnetic activity. For each star, the catalogue provides a list of about 70 parameters among which the most important are the stellar rotation period $P$, the photometric amplitude $A$ of the rotational signal and the Pearson Correlation Coefficient $r_0$ between brightness and magnitude variations. The Specific Objects Study (SOS) pipeline, developed to characterise magnetically active stars with Gaia Data, has been described in the paper accompanying the Gaia second Data Release. Here we describe the changes made to the pipeline and a new method developed to analyze Gaia time-series and to reveal spurious signals induced by instrumental effects or by the peculiar nature of the investigated stellar source. The period-amplitude diagram obtained with the DR3 data confirms the bimodal distribution of fast rotating stars seen in the DR2 release. The DR3 data permitted, for the first time, to analyze the patterns of magnitude-color variations for thousands of magnetically active stars. The measured $r_0$ values are tightly correlated with the stars position in the period-amplitude diagram. The relationship between the $P$, $A$ and $r_0$ parameters inferred for thousands of stars could be very useful to improve the understanding of stellar magnetic fields and to improve theoretical models. The method developed to reveal the spurious signals can be applied to each of the released Gaia photometric time-series and can be exploited by anyone interested in working directly with Gaia time-series.

Accepeted for pubblication in A&A

References in corpus (21)

• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• The Zwicky Transient Facility: Science Objectives
• Assessing statistical significance of periodogram peaks
• The Kepler Catalog of Stellar Flares
• The Zwicky Transient Facility Catalog of Periodic Variable Stars
• Generalized investigation of the rotation-activity relation: Favouring rotation period instead of Rossby number
• Gaia Data Release 3: Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry
• Results of the ROTOR-program. I. The long-term photometric variability of classical T Tauri stars
• Surface rotation and photometric activity for Kepler targets. II. G and F main-sequence stars, and cool subgiant stars
• Gaia Data Release 3. Summary of the variability processing and analysis
• The variability of Sun-like stars: reproducing observed photometric trends
• Gaia DR3 astrometric orbit determination with Markov Chain Monte Carlo and Genetic Algorithms. Systems with stellar, substellar, and planetary mass companions
• Stellar activity with LAMOST - II. Chromospheric activity in open clusters
• Accretion discs as regulators of stellar angular momentum evolution in the ONC and Taurus-Auriga
• Long-term magnetic activity in close binary systems. I. Patterns of color variations
• Gaia Data Release 3. Rotational modulation and patterns of colour variations in solar-like variables
• Activity cycles in members of young loose stellar associations
• A comparative study of four significance measures for periodicity detection in astronomical surveys
• $12660$ spotted stars toward the OGLE Galactic bulge fields

Cited by in corpus (21)

• Gaia Data Release 3: Summary of the content and survey properties
• Gaia Data Release 3. Summary of the variability processing and analysis
• Gaia Data Release 3: All-sky classification of 12.4 million variable sources into 25 classes
• Gaia Data Release 3: Pulsations in main sequence OBAF-type stars
• Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods
• Gaia Data Release 3. Rotational modulation and patterns of colour variations in solar-like variables
• Gaia Data Release 3. Stellar chromospheric activity and mass accretion from Ca II IRT observed by the Radial Velocity Spectrometer
• Gaia Data Release 3: The Gaia Andromeda Photometric Survey
• New insights into the rotational evolution of near-solar age stars from the open cluster M67
• Kepler meets Gaia DR3: homogeneous extinction-corrected color-magnitude diagram and binary classification
• Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution
• Signature of spin-down stalling in stellar magnetic activity. The case of the open cluster NGC 6811
• The NEMESIS Catalogue of Young Stellar Objects for the Orion Star Formation Complex. I. General description of data curation
• Measuring Long Stellar Rotation Periods (>10 days) from TESS FFI Light Curves is Possible: An Investigation Using TESS and ZTF
• A bird's eye view of stellar evolution through populations of variable stars in Galactic open clusters
• All-sky Guide Star Catalog for CSST
• Unsupervised learning for variability detection with Gaia DR3 photometry. The main sequence-white dwarf valley
• Nominal thresholds for good astrometric fits, and prospects for binary detectability, for the full extended Gaia mission
• VarWISE: Infrared Variability via NEOWISE Single Exposure Photometry
• Exploring Young Stellar Variability with Gaia DR3 light curves
• Rotation of young solar-type stars as seen by Gaia and K2