Minute-Cadence Observations of the LAMOST Fields with the TMTS: II. Catalogues of Short-Period Variable Stars from the First Two-Year Surveys

Abstract

Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables between hydrogen-rich and helium accretion, and blue large-amplitude pulsators (BLAPs), which greatly enrich our understandings of stellar physics under some extreme conditions. In this paper, we report the first-two-year discoveries of short-period variables (i.e., P<2 hr) by the Tsinghua University-Ma Huateng Telescopes for Survey (TMTS). TMTS is a multi-tube telescope system with a field of view up to 18 deg^2, which started to monitor the LAMOST sky areas since 2020 and generated uninterrupted minute-cadence light curves for about ten million sources within 2 years. Adopting the Lomb-Scargle periodogram with period-dependent thresholds for the maximum powers, we identify over 1 100 sources that exhibit a variation period shorter than 2 hr. Compiling the light curves with the Gaia magnitudes and colours, LAMOST spectral parameters, VSX classifications, and archived observations from other prevailing time-domain survey missions, we identified 1 076 as delta Scuti stars, which allows us study their populations and physical properties in the short-period regime. The other 31 sources include BLAPs, subdwarf B variables (sdBVs), pulsating WDs, ultracompact/short-period eclipsing/ellipsoidal binaries, cataclysmic variables below the period gap, etc., which are highly interesting and worthy of follow-up investigations.

arXiv comment22 pages, 15 figures, 5 tables, accepted by MNRAS

References in corpus (148)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The Transiting Exoplanet Survey Satellite
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• First Results from the Catalina Real-time Transient Survey
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• Understanding the Lomb-Scargle Periodogram
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• ATLAS: A High-Cadence All-Sky Survey System
• The stellar activity-rotation relationship and the evolution of stellar dynamos
• A $Gaia$ Data Release 2 catalogue of white dwarfs and a comparison with SDSS
• Population synthesis for double white dwarfs I.Close detached systems
• A simple test for periodic signals in red noise
• Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler Mission
• A First Catalog of Variable Stars Measured by the Asteroid Terrestrial-impact Last Alert System (ATLAS)
• The Zwicky Transient Facility Catalog of Periodic Variable Stars
• Comprehensive Photometric Histories of All Known Galactic Recurrent Novae
• Discovery of a Candidate Black Hole - Giant Star Binary System in the Galactic Field
• A Catalog and Atlas of Cataclysmic Variables - The Living Edition
• SDSS unveils a population of intrinsically faint cataclysmic variables at the minimum orbital period
• Remnant evolution after a carbon-oxygen white dwarf merger
• Periodic Flux Variability of Stars due to the Reflex Doppler Effect Induced by Planetary Companions
• A wide star-black-hole binary system from radial-velocity measurements
• A Bayesian test for periodic signals in red noise
• The Automatic Learning for the Rapid Classification of Events (ALeRCE) Alert Broker
• A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center
• Pulsating white dwarfs: new insights
• The structure and fate of white dwarf merger remnants
• {\em Gaia}-derived luminosities of {\em Kepler} A/F stars and the pulsator fraction across the δ Scuti instability strip
• A 12 minute Orbital Period Detached White Dwarf Eclipsing Binary
• Amplitude modulation in $\delta$ Sct stars: statistics from an ensemble study of Kepler targets
• Beaming Binaries - a New Observational Category of Photometric Binary Stars
• General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system
• The Multi-INstrument Burst ARchive (MINBAR)
• Post common envelope binaries from SDSS. XII: The orbital period distribution
• Characterising the observational properties of δ Sct stars in the era of space photometry from the Kepler mission
• The population of hot subdwarf stars studied with Gaia II. The Gaia DR2 catalogue of hot subluminous stars
• A highly magnetised and rapidly rotating white dwarf as small as the Moon
• A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources
• The Stony Brook / SMARTS Atlas of mostly Southern Novae
• The ELM Survey. VIII. 98 Double White Dwarf Binaries
• Catalogue and Properties of δ Scuti Stars in Binaries
• Thermonuclear X-ray bursts
• Multi-periodic pulsations of a stripped red giant star in an eclipsing binary
• Cataclysmic Variables from the Catalina Real-time Transient Survey
• HS0702+6043: A star showing both short-period p-mode and long-period g-mode oscillations
• SDSS J184037.78+642312.3: The First Pulsating Extremely Low Mass White Dwarf
• The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9
• The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources
• The origin and fate of short-period low-mass black-hole binaries
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
• Evidence of heavy-element ashes in thermonuclear X-ray bursts with photospheric superexpansion
• The Accretion Flows and Evolution of Magnetic Cataclysmic Variables
• A survey for pulsating subdwarf B stars with the Nordic Optical Telescope
• Blue large-amplitude pulsators as a new class of variable stars
• High frequency A-type pulsators discovered using SuperWASP
• The shortest period sdB plus white dwarf binary CD-30 11223 (GALEX J1411-3053)
• Orbital Period and Outburst Luminosity of Transient Low Mass X-ray Binaries
• A search for the hidden population of AM CVn binaries in the Sloan Digital Sky Survey
• Constraints on the space density of intermediate polars from the Swift-BAT survey
• The first light curve modeling and orbital period change investigation of nine contact binaries around the short period cut-off
• Eclipsing Post Common Envelope Binaries from the Catalina Surveys
• The period-luminosity relation for delta Scuti stars using Gaia DR2 parallaxes
• SuperWASP observations of pulsating Am stars
• A hot subdwarf-white dwarf super-Chandrasekhar candidate supernova Ia progenitor
• Discovery of 9 New Companions to Nearby Young M Stars with the Altair AO System
• Comprehensive Catalogue of the Overall Best Distances and Properties of 402 Galactic Novae
• The space density of magnetic cataclysmic variables
• NLTT5306: The shortest Period Detached White Dwarf + Brown Dwarf Binary
• Detectability of ultra-compact X-ray binaries as LISA sources
• Using electromagnetic observations to aid gravitational-wave parameter estimation of compact binaries observed with LISA
• Four ultra-short period eclipsing M-dwarf binaries in the WFCAM Transit Survey
• An 8.8 minute orbital period eclipsing detached double white dwarf binary
• The ASAS-SN Catalog of Variable Stars VI: An All-Sky Sample of $\delta$ Scuti Stars
• The Orbital Period of the Ultracompact Low-Mass X-Ray Binary 4U 1543--624
• Dwarf nova outbursts in intermediate polars
• The EREBOS project -- Investigating the effect of substellar and low-mass stellar companions on late stellar evolution
• A Population of Faint Non-Transient Low Mass Black Hole Binaries
• A New Gravitational Wave Verification Source
• Double-, triple-line spectroscopic candidates in the LAMOST Medium-Resolution Spectroscopic Survey
• High speed photometry of faint Cataclysmic Variables: II. RS Car, V365 Car,] V436 Car, AP Cru, RR Cha, BI Ori, CM Phe and V522 Sgr
• Year 1 of the ZTF high-cadence Galactic Plane Survey: Strategy, goals, and early results on new single-mode hot subdwarf B-star pulsators
• Statistical properties of dwarf novae-type cataclysmic variables: The Outburst Catalogue
• Data Mining for Dwarf Novae in SDSS, GALEX and Astrometric Catalogues
• Discovery and characterization of five new eclipsing AM CVn systems
• Birth of the ELMs: a ZTF survey for evolved cataclysmic variables turning into extremely low-mass white dwarfs
• Identification of the LMXB and Faint X-ray Sources in NGC 6652
• Beta Cephei stars in the ASAS-3 data. II. 103 new Beta Cephei stars and a discussion of low-frequency modes
• A new class of pulsating hot subdwarfs
• New hot subdwarf stars identified in Gaia DR2 with LAMOST DR5 spectra
• Time-resolved optical photometry of the ultra-compact binary 4U0614+091
• Ultra-compact X-ray binaries with He star companions
• Hot subdwarf Atmospheric parameters, Kinematics, and Origins -- Based on 1587 hot subdwarf stars observed in Gaia DR2 and LAMOST DR7
• First Kepler results on compact pulsators III: Subdwarf B stars with V1093~Her and hybrid (DW~Lyn) type pulsations
• Discovery of eleven new ZZ Ceti stars
• The ELM Survey. IX. A Complete Sample of Low Mass White Dwarf Binaries in the SDSS Footprint
• RATS-Kepler -- a deep high cadence survey of the Kepler field
• Black Holes in Short Period X-ray Binaries and the Transition to Radiatively Inefficient Accretion
• Discovery of a hot ultramassive rapidly rotating DBA White Dwarf
• New developments of the ZZ Ceti instability strip: The discovery of eleven new variables
• The X-ray source content of the XMM-Newton Galactic Plane Survey
• Localised thermonuclear bursts from accreting magnetic white dwarfs
• The Likely Orbital Period of the Ultracompact Low-Mass X-Ray Binary 2S 0918-549
• The Tsinghua University-Ma Huateng Telescopes for Survey: Overview and Performance of the System
• A Catalogue of Solar-Like Oscillators Observed by TESS in 120-second and 20-second Cadence
• Post-common-envelope binary stars, radiative levitation, and blue large-amplitude pulsators
• Pulsation in faint blue stars
• Detections of solar-like oscillations in dwarfs and subgiants with Kepler DR25 short-cadence data
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VIII: The Eighth Year (2015-2016)
• The OmegaWhite Survey for Short-Period Variable Stars I: Overview and First Results
• TESS light curves of cataclysmic variables -- II: Superhumps in old novae and novalike variables
• SDSS J233325.92+152222.1 and the evolution of intermediate polars
• Which evolutionary status does the Blue Large-Amplitude Pulsators stay at?
• Spectroscopic and Photometric Periods of Six Ultracompact Accreting Binaries
• Formation of ultra-massive carbon-oxygen white dwarfs from the merger of carbon-oxygen and helium white dwarf pairs
• Discovery of a Detached, Eclipsing 40 min Period Double White Dwarf Binary and a Friend: Implications for He+CO White Dwarf Mergers
• High Tide: A Systematic Search for Ellipsoidal Variables in ASAS-SN
• Binary evolution pathways of Blue Large-Amplitude Pulsators
• Asteroseismic analysis of variable hot subdwarf stars observed with TESS I. The mean g-mode period spacings in hot subdwarf B stars
• Studying bright variable stars with the Multi-site All-Sky CAmeRA (MASCARA)
• Photometry and spectroscopy of the new sdBV CS 1246
• Eclipsing White Dwarf Binaries in Gaia and the Zwicky Transient Facility
• The OmegaWhite Survey for short period variable stars II: An overview of results from the first four years
• A 62-minute orbital period black widow binary in a wide hierarchical triple
• Mining for Candidates of Galactic Stellar-mass Black Hole Binaries with LAMOST
• A catalogue of 323 cataclysmic variables from LAMOST DR6
• HST spectrum and timing of the ultra-compact X-ray binary candidate 47 Tuc X9
• Two New Tidally Distorted White Dwarfs
• Minute-cadence Observations of the LAMOST Fields with the TMTS: I. Methodology of Detecting Short-period Variables and Results from the first-year Survey
• HD 133729: A blue large-amplitude pulsator in orbit around a main-sequence B-type star
• Identifying Blue Large Amplitude Pulsators from Gaia DR2 & ZTF DR3
• Stellar variability on time-scales of minutes: results from the first 5 years of the Rapid Temporal Survey (RATS)
• A dense $0.1{\mathbf{M}}_{\odot }$ star in a 51-minute orbital period eclipsing binary
• An 18.9-minute Blue Large-Amplitude Pulsator Crossing the 'Hertzsprung Gap' of Hot Subdwarfs
• The OmegaWhite Survey for Short-Period Variable Stars VII: High amplitude, short period blue variables
• A Catalog of Short Period Spectroscopic and Eclipsing Binaries Identified from the LAMOST & PTF Surveys
• White dwarfs identified in LAMOST Data Release 5
• Statistics of BY Draconis Chromospheric Variable Stars
• The relation between outburst rate and orbital period in low-mass X-ray binary transients
• Hubble Space Telescope STIS Spectroscopy of Three Peculiar Nova-Like Variables: BK Lyn, V751 Cygni and V380 Oph
• Discovery, TESS Characterization, and Modeling of Pulsations in the Extremely Low Mass White Dwarf GD 278
• The Puzzling Story of Flare Inactive Ultra Fast Rotating M dwarfs. I. Exploring their Magnetic Fields
• State Transitions in Ultracompact Neutron Star LMXBs: towards the Low Luminosity Limit
• The energetic thermonuclear bursts in SAX J1712.6-3739
• The Puzzling Story of Flare Inactive Ultra Fast Rotating M dwarfs. II. Searching for radial velocity variations
• The first photometric investigation and spectroscopic analysis of two contact binaries: ASAS J124343+1531.7 and LINEAR 2323566
• New short period stellar pulsators at large Galactocentric distances

Cited by in corpus (4)

• A seven-Earth-radius helium-burning star inside a 20.5-min detached binary
• A post-common-envelope binary with double-peaked Balmer emission lines from TMTS
• The first low-mass eclipsing binary within the fully convective zone from TMTS
• Investigating the Period-Luminosity Relations of delta Scuti Stars: A Pathway to Distance and 3-D Dust Map Inference