Hans Martin Schwengeler

Ten new triply eclipsing triple star systems

T. Borkovits, S. Rappaport, T. Mitnyan, R. Gagliano et autres

hu, pt, us, gb, dk, sk (code pays fourni par la source)

Kepler Image-subtracted Light Curves and Variable Star Catalog of NGC 6819

Melinda Soares-Furtado, Rianna V. Kuenzi, Rachel Lee McClure, Nicholas T. Marston et autres

Abstract Variable stars in open clusters are valuable probes of stellar evolution. They provide precise measurements of stellar properties, constrain cluster ages and distances, and trace the angular momentum evolution of stellar populations. To advance these studies, we applied image subtraction and …

us, Afrique du Sud, gb (code pays fourni par la source)

The HD 60779 Planetary System: A Transiting Sub-Neptune on a 30 Day Orbit and a More Massive Outer World

Victoria DiTomasso, David Charbonneau, Andrew M. Vanderburg, Mercedes López‐Morales et autres

Abstract We present the discovery of the planetary system orbiting the bright ( V = 7.2), nearby (35 pc), Sun-like ( M ⋆ = 1.050 ± 0.044 M ⊙ , R ⋆ = 1.129 ± 0.013 R ⊙ ) star, HD 60779. …

us, gb, it, dk, ch, es, au, Afrique du Sud (code pays fourni par la source)

HIRES TOI-1136s planets and planet b radial velocities

Fei Dai, Kento Masuda, Corey Beard, Paul M. Robertson et autres

us, jp, dk, au, ch, cn, gb, ru, es (code pays fourni par la source)

Kepler Image-Subtracted Light Curves and Variable Star Catalog of NGC 6819

Melinda Soares-Furtado, Rianna Kuenzi, Rachel Lee McClure, Nicholas T. Marston et autres

Variable stars in open clusters are valuable probes of stellar evolution. They provide precise measurements of stellar properties, constrain cluster ages and distances, and trace the angular momentum evolution of stellar populations. To advance these studies, we applied image subtraction and systematic …

us (code pays fourni par la source)

52 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images

Veselin B. Kostov, Brian P. Powell, S. Rappaport, T. Borkovits et autres

us, hu, gb, pl, bg (code pays fourni par la source)

52 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images

Veselin B. Kostov, Brian P. Powell, S. Rappaport, T. Borkovits et autres

Abstract We present the discovery of 52 eclipsing quadruple star candidates detected in TESS Full Frame Image eleanor data by machine learning and citizen scientists. The uniformly vetted and validated targets exhibit two sets of eclipses following two distinct periods, representing quadruple …

Ten new, ultracompact triply eclipsing triple star systems

T. Borkovits, S. Rappaport, T. Mitnyan, R. Gagliano et autres

We have identified more than a hundred close triply eclipsing hierarchical triple star systems from data taken with the space telescope TESS. Many of them have outer periods less than or, close to 100 days, hence, we call them `ultracompact hierarchical triples'. …

The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods

Brian P. Powell, Guillermo Torres, Veselin B. Kostov, T. Borkovits et autres

Abstract We present the discovery of two quadruple star systems—TIC 285853156 and TIC 392229331—each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC 392229331 and TIC 285853156 have the second and third shortest outer orbital periods (145 …

us, hu, gb (code pays fourni par la source)

Starspots on eclipsing giant stars

K. Oláh, B. Seli, András Haris, S. Rappaport et autres

Context. Spotted stars in eclipsing binary systems allow us to gather significant information about the stellar surface inhomogeneities that is otherwise unobtainable from only photometric data. Starspots can be scanned using the eclipse (or transit) mapping technique, which takes advantage of the …

The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods

Brian P. Powell, Guillermo Torres, Veselin B. Kostov, T. Borkovits et autres

We present the discovery of two quadruple star systems -- TIC 285853156 and TIC 392229331 -- each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC 392229331 and TIC 285853156 have the second and third shortest outer …

TIC 290061484: A Triply Eclipsing Triple System with the Shortest Known Outer Period of 24.5 Days

Veselin B. Kostov, S. Rappaport, T. Borkovits, Brian P. Powell et autres

Abstract We have discovered a triply eclipsing triple-star system, TIC 290061484, with the shortest known outer period, P out, of only 24.5 days. This “eclipses” the previous record set by λ Tauri at 33.02 days, which held for 68 yr. The inner …