R. Gagliano
A5076653706- Gamma-ray bursts and supernovae
- Economic and Technological Developments in Russia
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- solar cell performance optimization
- Distributed and Parallel Computing Systems
- History and Developments in Astronomy
- Engineering Education and Technology
- Historical Astronomy and Related Studies
- Gyrotron and Vacuum Electronics Research
- Indigenous Studies and Ecology
- Simulation Techniques and Applications
- Ancient Mediterranean Archaeology and History
- Geological and Geophysical Studies
- Acoustic Wave Resonator Technologies
- Atomic and Subatomic Physics Research
- Ancient Egypt and Archaeology
- Advanced MEMS and NEMS Technologies
- Geophysics and Sensor Technology
Yale University
2020
In this paper we present a catalog of 4584 eclipsing binaries observed during the first two years (26 sectors) TESS survey. We discuss selection criteria for binary candidates, detection hither-to unknown systems, determination ephemerides, validation and triage process, derivation heuristic estimates ephemerides. Instead keeping to widely used discrete classes, propose star morphology classification based on dimensionality reduction algorithm. Finally, statistical properties sample,...
We report the discovery and confirmation of a transiting circumbinary planet (PH1b) around KIC 4862625, an eclipsing binary in Kepler field. The was discovered by volunteers searching first six Quarters publicly available data as part Planet Hunters citizen science project. Transits across larger brighter stars are detectable visual inspection every ~137 days, with seven transits identified 1-11. physical orbital parameters both host were obtained via photometric-dynamical model,...
Exoplanets can evolve significantly between birth and maturity, as their atmospheres, orbits, structures are shaped by environment. Young planets ($<$1 Gyr) offer an opportunity to probe the critical early stages of this evolution, where fastest. However, most known young orbit prohibitively faint stars. We present discovery two transiting HD 63433 (TOI 1726, TIC 130181866), a Sun-like ($M_*=0.99\pm0.03$) star. Through kinematics, lithium abundance, rotation, we confirm that is member Ursa...
In this work we report the discovery and analysis of six new compact triply eclipsing triple star systems found with TESS mission: TICs 37743815, 42565581, 54060695, 178010808, 242132789, 456194776. All these exhibit distinct third body eclipses where inner binary (EB) occults (`tertiary') star, or vice versa. We utilized photometry, archival photometric data, available spectral energy distribution curves (SED) to solve for properties all three stars, as well many orbital elements. describe...
We report the discovery of TOI-2180 b, a 2.8 $M_{\rm J}$ giant planet orbiting slightly evolved G5 host star. This transited only once in Cycle 2 primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified 24 hr single-transit event shortly after data were released, allowing Doppler monitoring campaign with Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined orbital period b be 260.8$\pm$0.6 days,...
Aims. We introduce a novel way to identify new compact hierarchical triple stars by exploiting the huge potential of Gaia DR3 and also its future data releases. aim increase current number systems significantly. Methods. used several eclipsing binary catalogs from different sky surveys that list total more than 1 million targets search for non-single-star orbital solutions with periods substantially longer binaries. Those in most cases are likely belong outer orbits tertiary those systems....
ABSTRACT In this work, we report the independent discovery and analysis of nine new compact triply eclipsing triple star systems found with Transiting Exoplanet Survey Satellite (TESS) mission: TICs 47151245, 81525800, 99013269, 229785001, 276162169, 280883908, 294803663, 332521671, 356324779. Each these exhibits distinct third-body eclipses where third (‘tertiary’) occults inner binary (EB), or vice versa. We utilize a photodynamical TESS photometry, archival photometric data, eclipse...
ABSTRACT In this work we report the discovery and analysis of three new triply eclipsing triple star systems found with TESS mission during its observations northern skies: TICs 193993801, 388459317, 52041148. We utilized precision photometry binary eclipses third-body events, ground-based archival follow-up photometric data, eclipse timing variations, spectral energy distributions, as well theoretical evolution tracks in a joint photodynamical to deduce system masses orbital parameters both...
Abstract We present a catalog of 97 uniformly vetted candidates for quadruple star systems. The were identified in TESS full-frame image data from sectors 1–42 through combination machine-learning techniques and visual examination, with major contributions dedicated group citizen scientists. All targets exhibit two sets eclipses different periods, both which pass photocenter tests confirming that the are on target. This outlines statistical properties sample, nearly doubles number known...
Abstract This article presents the history of Visual Survey Group (VSG)—a Professional-Amateur (Pro-Am) collaboration within field astronomy working on data from several space missions (Kepler, K2 and Transiting Exoplanet Satellite). paper covers formation VSG, its survey-methods including most common tools used discoveries made over past decade. So far, group has visually surveyed nearly 10 million light curves authored 69 peer-reviewed papers which mainly focus exoplanets involving...
The census of exoplanets is incomplete for orbital distances larger than 1 AU. Here, we present 41 long-period planet candidates in 38 systems identified by Planet Hunters based on Kepler archival data (Q0–Q17). Among them, 17 exhibit only one transit, 14 have two visible transits, and 10 more three transits. For with estimate their periods transit duration host star properties. majority the this work (75%) that correspond to 1–3 AU from stars. We conduct follow-up imaging spectroscopic...
We report the discovery in $TESS$ Sectors 3 and 4 of a compact triply eclipsing triple star system. TIC 209409435 is previously unknown binary with period 5.717 days, presence third an outer eccentric orbit 121.872 day was found from two sets third-body eclipses eclipse timing variations. The latter exhibit signatures strong 3rd-body perturbations. After discovery, we obtained follow-up ground-based photometric observations several as well another eclipses. carried out comprehensive...
Aims. We have identified nearly a hundred close triply eclipsing hierarchical triple star systems from data taken with the space telescope TESS. These are noteworthy in that we can potentially determine their dynamical and astrophysical parameters high precision. In present paper, report comprehensive study of seven new compact this larger sample: TICs 133771812, 176713425, 185615681, 287756035, 321978218, 323486857, 650024463. Methods. Most for come TESS observations, but two them Gaia...
BG Ind is a well studied, bright, nearby binary consisting of pair F stars in 1.46-day orbit. We have discovered the TESS lightcurve for TIC 229804573 (aka Ind) second eclipsing system with 0.53-day. Our subsequent analyses recent and archival ground-based photometric radial velocity data, reveal that two binaries are gravitationally bound 721-day period, moderately eccentric present results joint spectro-photodynamical analysis eclipse timing variation curves both based on lightcurve, data...
We report the discovery of TOI-4127 b, a transiting, Jupiter-sized exoplanet on long-period ($P = 56.39879^{+0.00010}_{-0.00010}$ d), high-eccentricity orbit around late F-type dwarf star. This warm Jupiter was first detected and identified as promising candidate from search for single-transit signals in TESS Sector 20 data, later characterized planet following two subsequent transits (TESS Sectors 26 53) follow-up ground-based RV observations with NEID SOPHIE spectrographs. jointly fit...
We present high-resolution observations of a sample 75 K2 targets from Campaigns 1-3 using speckle interferometry on the Southern Astrophysical Research (SOAR) telescope and adaptive optics (AO) imaging at Keck II telescope. The median SOAR $I$-band $K_s$-band detection limits 1" were $Δm_{I}=4.4$~mag $Δm_{K_s}=6.1$~mag, respectively. This includes 37 stars likely to host planets, 32 be eclipsing binaries (EBs), 6 other previously labeled as planetary false positives. find nine physically...
We report the discovery with $TESS$ of a third set eclipses from V994 Herculis (TIC 424508303), previously only known as doubly-eclipsing system. The key implication this and our analyses is that Her second fully-characterized (2+2) + 2 sextuple system, in which all three binaries eclipse. In work, we use combination ground-based observations data to analyze A B order update parameters inner quadruple's orbit (with derived period 1062 $\pm$ 2d). binary C were detected also found older...
We present the discovery of a new highly compact quadruple star system, TIC 219006972, consisting two eclipsing binary stars with orbital periods 8.3 days and 13.7 days, an outer period only 168 days. This is full factor 2 shorter than shortest reported previously, VW LMi, where components orbit each other every 355 The target was observed by TESS in Full-Frame Images sectors 14-16, 21-23, 41, 48 49, produced sets primary secondary eclipses. These show strongly non-linear eclipse timing...
We present new planet candidates identified in NASA Kepler quarter two public release data by volunteers engaged the Planet Hunters citizen science project. The presented here survive checks for false-positives, including examination of pixel offset to constrain possibility a background eclipsing binary. orbital periods are 97.46 days (KIC 4552729) and 284.03 10005758) modeled radii 5.3 3.8 R_Earth. latter star has an additional known candidate with radius 5.05 R_Earth period 134.49 which...
Dipper stars are a classification of young stellar objects that exhibit dimming variability in their light curves, dropping brightness by 10-50%, likely induced occultations due to circumstellar disk material. This can be periodic, quasi-periodic, or aperiodic. have been discovered associations via ground-based and space-based photometric surveys. We present the detection characterization largest collection dipper date: 293 stars, including 234 new candidates. produced catalog these targets,...
ABSTRACT We have found that the 2+2 quadruple star system BU CMi is currently most compact known, with an extremely short outer period of only 121 d. The previous record holder was TIC 219006972 (Kostov et al.), a 168 nature established by Volkov, Kravtsova & Chochol, but they misidentified as 6.6 yr. contains two eclipsing binaries (EBs), each near 3 d, and substantial eccentricity ≃0.22. All four stars are within ∼0.1 M⊙ 2.4 M⊙. Both exhibit dynamically driven apsidal motion fairly...
ABSTRACT We present our second catalogue of quadruple star candidates, containing 101 systems discovered in TESS Full-Frame Image data. The targets were initially detected as eclipsing binary stars with the help supervised machine learning methods applied to sectors (Sectors 1 through 54). A dedicated team citizen scientists subsequently identified visual inspection two sets eclipses following different periods. All presented here pass comprehensive photocenter motion tests confirming that...
Abstract We report the discovery and confirmation of Transiting Exoplanet Survey Satellite (TESS) single-transit, warm dense sub-Saturn, TIC 139270665 b. This planet is unusually for its size: with a bulk density 2.13 g cm −3 (0.645 R J , 0.463 M ), it densest sub-Saturn TESS family. It orbits metal-rich G2 star. also found evidence second planet, c, longer period <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mn>1010</mml:mn>...
Abstract The Transiting Exoplanet Survey Satellite (TESS) has enabled the discovery of numerous tidally tilted pulsators (TTPs), which are pulsating stars in close binaries where presence a tidal bulge effect tilting primary star’s pulsation axes into orbital plane. Recently, modeling framework developed to analyze TTPs been applied emerging class triaxial pulsators, exhibit nonradial pulsations about three perpendicular axes. In this work, we report on identification second-ever discovered...