Search Publications
High-throughput quantum chemistry: empowering the search for molecular candidates behind unknown spectral signatures in exoplanetary atmospheres
McKemmish, Laura K.; Pettyjohn, Maria M.; Zapata Trujillo, Juan C.
The identification of molecules in exoplanetary atmospheres is only possible thanks to the availability of high-resolution molecular spectroscopic data. However, due to its intensive and time-consuming generation process, at present, only 100 molecules have high-resolution spectroscopic data available, limiting new molecular detections. Using rout…
Ups!... I did it again: unveiling the hidden companion in Upsilon Sagittarii, a unique binary system at a second mass transfer stage
Shenar, Tomer; Gilkis, Avishai
Upsilon Sagittarii is a hydrogen-deficient binary that has been suggested to be in its second stage of mass transfer, after the primary has expanded to become a helium supergiant following core helium exhaustion. A tentative identification of the faint companion in the ultraviolet led to mass estimates of both components that made the helium star …
Chemical Differentiation around Five Massive Protostars Revealed by ALMA: Carbon-chain Species and Oxygen/Nitrogen-bearing Complex Organic Molecules
Caselli, Paola; Nakamura, Fumitaka; Li, Zhi-Yun +9 more
We present Atacama Large Millimeter/submillimeter Array Band 3 data toward five massive young stellar objects (MYSOs), and investigate relationships between unsaturated carbon-chain species and saturated complex organic molecules (COMs). An HC5N (J = 35-34) line has been detected from three MYSOs, where nitrogen (N)-bearing COMs (CH
Multiple gas phases in supernova remnant IC 443: mapping shocked H2 with VLT/KMOS
Fang, Min; Chen, Zhiwei; Bian, Fuyan +8 more
Supernovae and their remnants provide energetic feedback to the ambient interstellar medium (ISM), which is often distributed in multiple gas phases. Among them, warm molecular hydrogen (H2) often dominates the cooling of the shocked molecular ISM, which has been observed with the H2 emission lines at near-infrared wavelength…
Statistical analysis of dynamical evolution of open clusters
Joshi, Y. C.; Maurya, Jayanand; Samal, Manash Ranjan +2 more
We present the dynamical evolution of 10 open clusters, which were part of our previous studies. These clusters include both young and intermediate-age open clusters with ages ranging from
Distinguishing Dark Matter Cusps from Cores Using Globular Clusters
Greene, Jenny E.; Danieli, Shany; Modak, Shaunak
Globular clusters (GCs) provide valuable insight into the properties of their host galaxies' dark matter halos. Using N-body simulations incorporating semianalytic dynamical friction and GC-GC merger prescriptions, we study the evolution of GC radial distributions and mass functions in cuspy and cored dark matter halos. Modeling the dynamics of th…
Energetics of a Solar Flare and a Coronal Mass Ejection Generated by a Hot Channel Eruption
Li, Dong; Zhang, Qingmin; Zhang, Yanjie +2 more
Hot channels (HCs) are prevalent in the solar corona and play a critical role in driving flares and coronal mass ejections (CMEs). In this paper, we estimate the energy content of an X1.4 eruptive flare with a fast CME generated by an HC eruption on 2011 September 22. Originating from NOAA Active Region 11302, the HC is the most dramatic feature i…
Discovery of extraordinary X-ray emission from magnetospheric interaction in the unique binary stellar system ϵ Lupi
Corcoran, M. F.; Leutenegger, M. A.; Wade, G. A. +12 more
We report detailed X-ray observations of the unique binary system ϵ Lupi, the only known short-period binary consisting of two magnetic early-type stars. The components have comparably strong, but anti-aligned magnetic fields. The orbital and magnetic properties of the system imply that the magnetospheres overlap at all orbital phases, suggesting …
Chemo-dynamical tagging in the outskirts: The origins of stellar substructures in the Magellanic Clouds
Monachesi, Antonela; Choi, Yumi; Majewski, Steven R. +12 more
We present the first detailed chemical analysis from APOGEE-2S observations of stars in six regions of recently discovered substructures in the outskirts of the Magellanic Clouds extending to 20° from the Large Magellanic Cloud (LMC) center. We also present, for the first time, the metallicity and α-abundance radial gradients of the LMC and the Sm…
Age Distribution of Exoplanet Host Stars: Chemical and Kinematic Age Proxies from GAIA DR3
Manoj, P.; Narang, Mayank; Swastik, C. +4 more
The GAIA space mission is impacting astronomy in many significant ways by providing a uniform, homogeneous, and precise data set for over 1 billion stars and other celestial objects in the Milky Way and beyond. Exoplanet science has greatly benefited from the unprecedented accuracy of the stellar parameters obtained from GAIA. In this study, we co…