Short Term Variability of Evolved Massive Stars with TESS

Abstract

We present the first results from a study of TESS Sector 1 and 2 light curves for eight evolved massive stars in the LMC: six yellow supergiants (YSGs) and two luminous blue variables (LBVs), including S Doradus. We use an iterative prewhitening procedure to characterize the short-timescale variability in all eight stars. The periodogram of one of the YSGs, HD 269953, displays multiple strong peaks at higher frequencies than its fellows. While the field surrounding HD 269953 is quite crowded, it is the brightest star in the region, and has infrared colors indicating it is dusty. We suggest HD 269953 may be in a post-red supergiant evolutionary phase. We find a signal with a period of $\sim 5$ days for the LBV HD 269582. The periodogram of S Doradus shows a complicated structure, with peaks below frequencies of 1.5 cycles per day. We fit the shape of the background noise of all eight light curves, and find a red noise component in all of them. However, the power law slope of the red noise and the timescale over which coherent structures arise changes from star to star. Our results highlight the potential for studying evolved massive stars with TESS.

arXiv comment24 pages, 11 figures, 12 Tables. Accepted, ApJ. Comments welcome

References in corpus (65)

• Astropy: A Community Python Package for Astronomy
• Gaia Data Release 2. Summary of the contents and survey properties
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Transiting Exoplanet Survey Satellite
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Binary interaction dominates the evolution of massive stars
• Gaia Data Release 2: The astrometric solution
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
• A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovae
• The TESS Input Catalog and Candidate Target List
• Mass loss from hot massive stars
• Gaia Data Release 2: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• The VLT-FLAMES Tarantula Survey VIII. Multiplicity properties of the O-type star population
• The Radial Velocity Experiment (RAVE): Fifth Data Release
• Weakened magnetic braking as the origin of anomalously rapid rotation in old field stars
• Assessing statistical significance of periodogram peaks
• A simple test for periodic signals in red noise
• The Unprecedented 2012 Outburst of SN 2009ip: A Luminous Blue Variable Becomes a True Supernova
• Hydrodynamical Simulations of Corotating Interaction Regions and Discrete Absorption Components in Rotating O-Star Winds
• A Stellar Rotation Census of B Stars: from ZAMS to TAMS
• Evolution of massive stars with pulsation-driven superwinds during the RSG phase
• Pre-Supernova Outbursts via Wave Heating in Massive Stars I: Red Supergiants
• Spitzer SAGE Infrared Photometry of Massive Stars in the Large Magellanic Cloud
• Variability in red supergiant stars: pulsations, long secondary periods and convection noise
• Ghostly Tributaries to the Milky Way: Charting the Halo's Stellar Streams with the Gaia DR2 catalogue
• Luminous Blue Variables are Antisocial: Their Isolation Implies that they are Kicked Mass Gainers in Binary Evolution
• A Survey of Local Group Galaxies Currently Forming Stars: II. UBVRI Photometry of Stars in Seven Dwarfs and a Comparison of the Entire Sample
• Kepler observations of variability in B-type stars
• A unifying explanation of complex frequency spectra of gamma Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
• Theory and evidence of global Rossby waves in upper main-sequence stars: r-mode oscillations in many Kepler stars
• Most Detects G- and P-Modes in the B Supergiant HD 163899 (B2Ib/II)
• Radiative hydrodynamics simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
• Yellow and Red Supergiants in the Large Magellanic Cloud
• Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150 and HD 46966
• Three Dimensional Radiation Hydrodynamic Simulations of Massive Star Envelopes
• Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample
• On the Social Traits of Luminous Blue Variables
• BRITE-Constellation high-precision time-dependent photometry of the early-O-type supergiant $\zeta$ Puppis unveils the photospheric drivers of its small- and large-scale wind structures
• SN 2009ip at late times - an interacting transient at +2 years
• Can mass loss and overshooting prevent the excitation of g-modes in blue supergiants?
• Kepler's first view of O-star variability: K2 data of five O stars in Campaign 0 as a proof-of-concept for O-star asteroseismology
• Kepler sheds new and unprecedented light on the variability of a blue supergiant: gravity waves in the O9.5Iab star HD 188209
• PX Andromedae: Superhumps and variable eclipse depth
• The Close Binary Frequency of Wolf-Rayet Stars as a Function of Metallicity in M31 and M33
• Shedding Light on the Isolation of Luminous Blue Variables
• WR 110: A Single Wolf-Rayet Star With Corotating Interaction Regions In Its Wind?
• Rotating Stars from Kepler Observed with Gaia DR2
• A Complete Census of Luminous Stellar Variability on Day to Decade Timescales
• Light variations due to the line-driven wind instability and wind blanketing in O stars
• Binary Red Supergiants: A New Method for Detecting B-type Companions
• Pulsational instability in B-type supergiant stars
• Low-amplitude rotational modulation rather than pulsations in the CoRoT B-type supergiant HD 46769
• Optical spectroscopy of the blue supergiant Sk-69 279 and its circumstellar shell with SALT
• Pulsations as a Driver for LBV Variability
• Pulsations in B-type supergiants with masses $M<20M_{\odot }$ before and after core helium ignition
• The Evolution of Massive Stars: Bridging the Gap in the Local Group
• Detection of intrinsic variability in the eclipsing massive main sequence O+B binary HD 165246
• Stochastic Variability of Luminous Blue Variables
• Revising the evolutionary stage of HD 163899: the effects of convective overshooting and rotation

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