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TOI-1749: an M dwarf with a Trio of Planets including a Near-resonant Pair
Tamura, M.; Pallé, E.; Béjar, V. J. S. +66 more
We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photo…
Tidally Excited Modes and δ Scuti Pulsations in the Eclipsing Triple Star IM Persei
Hong, Kyeongsoo; Lee, Jae Woo; Kim, Hye-Young
IM Per is a triple star system whose eclipsing pair masses and radii are accurate to within 1%. The Transiting Exoplanet Survey Satellite (TESS) light curve of the program target exhibits partial eclipses and multiple oscillations with millimagnitude-level amplitudes. It is found that the oscillations affect eclipse timing measurements. Binary mod…
What's Behind the Elephant's Trunk? Identifying Young Stellar Objects on the Outskirts of IC 1396
Principe, David A.; Wolk, Scott J.; Kim, Jinyoung Serena +2 more
Empirically, the estimated lifetime of a typical protoplanetary disk is <5-10 Myr. However, the disk lifetimes required to produce a variety of observed exoplanetary systems may exceed this timescale. Some hypothesize that this inconsistency is due to estimating disk fractions at the cores of clusters, where radiation fields external to a star-…
HD 219134 Revisited: Planet d Transit Upper Limit and Planet f Transit Nondetection with ASTERIA and TESS
Vanderburg, Andrew; Latham, David W.; Schlieder, Joshua E. +38 more
HD 219134 is a K3V dwarf star with six reported radial-velocity discovered planets. The two innermost planets b and c show transits, raising the possibility of this system to be the nearest (6.53 pc), brightest (V = 5.57) example of a star with a compact multiple transiting planet system. Ground-based searches for transits of planets beyond b and …
Revisiting Newly Large Magellanic Cloud Age-gap Star Clusters
Piatti, Andrés E.
Recently, a noticeable number of new star clusters was identified in the outskirts of the Large Magellanic Cloud (LMC) populating the so-called star-cluster age gap, a space of time (∼4-12 Gyr) where the only known star cluster is up-to-date ESO 121-SC 03. We used Survey of the Magellanic Stellar History DR2 data sets, as well as those employed to…
Eclipsing Binary Populations across the Northern Galactic Plane from the KISOGP Survey
Kobayashi, Naoto; Maehara, Hiroyuki; Matsunaga, Noriyuki +8 more
We present a catalog of eclipsing binaries in the northern Galactic plane from the Kiso Wide-Field Camera Intensive Survey of the Galactic Plane (KISOGP). We visually identified 7055 eclipsing binaries spread across ∼330 deg2, including 4197 W Ursa Majoris/EW-type, 1458 β Lyrae/EB-type, and 1400 Algol/EA-type eclipsing binaries. For all…
Mapping Gaia Parallax Systematic Errors over the Sky with Faint Milky Way Stars
Fardal, Mark A.; Sohn, Sangmo Tony; del Pino, Andrés +1 more
Parallaxes measured by the Gaia mission have huge significance for astronomy, but parallaxes in Gaia DR2 are known to have systematic errors that depend on the source position and other quantities. We use the abundant information in faint Milky Way stars, along with the Gaia Object Generator simulation of the Gaia catalog, to probe the spatial dep…
Two Luminous Post-AGB Stars in the Galactic Globular Cluster M19
Bond, Howard E.; Ciardullo, Robin; Siegel, Michael H. +1 more
We report the discovery of a luminous "yellow" post-asymptotic giant branch (PAGB) star in the globular cluster (GC) M19 (NGC 6273), identified during our uBVI survey of Galactic GCs. The uBVI photometric system is optimized to detect stars with large Balmer discontinuities, indicating very low surface gravities and high luminosities. The spectral…
Around Which Stars Can TESS Detect Earth-like Planets? The Revised TESS Habitable Zone Catalog
Stassun, K.; Kaltenegger, L.; Pepper, J. +3 more
In the search for life in the cosmos, NASA's Transiting Exoplanet Survey Satellite (TESS) mission has already monitored about 74% of the sky for transiting extrasolar planets, including potentially habitable worlds. However, TESS only observed a fraction of the stars long enough to be able to find planets like Earth. We use the primary mission dat…
IGRINS RV: A Precision Radial Velocity Pipeline for IGRINS Using Modified Forward Modeling in the Near-infrared
Tang, Shih-Yun; Johns-Krull, Christopher M.; Prato, L. +7 more
Application of the radial velocity (RV) technique in the near-infrared is valuable because of the diminished impact of stellar activity at longer wavelengths, making it particularly advantageous for the study of late-type stars but also for solar-type objects. In this paper, we present the IGRINS RV open-source python pipeline for computing infrar…