Search Publications
The Second Case of a Major Merger Triggering a Starburst in a Green Pea Galaxy
Ghosh, T.; Malhotra, S.; Rhoads, J. +4 more
We have used the Karl G. Jansky Very Large Array (VLA) to map H I 21 cm emission from the Green Pea galaxy GP J1148+2546 at z ≈ 0.0451, only the second measurement of the H I spatial distribution of a Green Pea. The VLA H I 21 cm image, the DECaLS optical image, and Sloan Digital Sky Survey spectroscopy show that GP J1148+2546 has two neighbors, t…
A new atmospheric characterization of the sub-stellar companion HR 2562 B with JWST/MIRI observations
Tremblin, P.; Stolker, T.; Lagage, P. O. +8 more
Context. HR 2562 B is a planetary-mass companion at an angular separation of 0.56″ (19 au) from the host star, which is also a member of a select number of L/T transitional objects orbiting a young star. This companion gives us a great opportunity to contextualize and understand the evolution of young objects in the L/T transition. However, the ma…
LeMMINGs. Multiwavelength constraints on the co-existence of nuclear star clusters and AGN in nucleated galaxies
Argo, M. K.; Gallagher, J. S.; Knapen, J. H. +16 more
The relation between nuclear star clusters (NSCs) and the growth of the central supermassive black holes (SMBHs), as well as their connection to the properties of the host galaxies, is crucial for understanding the evolution of galaxies. Recent observations have revealed that about 10 per cent of nucleated galaxies host hybrid nuclei, consisting o…
Parameters of the Possible Companion of the Neutron Star toward the Supernova Remnant G315.4–2.30
Pakhomov, Yu. V.
Based on low-resolution (
A detailed study of dwarf galaxies in the core of the Coma Cluster
Hasan, S. N.; Poloji, Nagamani; Hasan, Priya
In an earlier paper, we determined the morphological types of galaxies in the Coma Cluster using data from the HST/ACS Coma Cluster treasury survey. Of the 132 members, 51 are non-dwarfs and 81 are dwarfs. We define dwarfs to have an absolute luminosity
At the same age, metallicity, and alpha-enhancement, sodium is a more effective tracer of the young and old sequences of the Milky Way disc
Buder, Sven; Owusu, Evans Kojo; Ruiter, Ashley J. +2 more
Trends in elemental enrichment with stellar age can give us a powerful avenue to identify thus far unexplained origin sites of the elements. We investigate stellar abundance trends using the GALAH DR3 high-resolution spectroscopic dataset of 6 234 solar-type stars. Our study explores the elemental abundance [X/Fe] of sodium (Na) with stellar age. …
A study of centaur (54598) Bienor from multiple stellar occultations and rotational light curves
Colas, F.; Souami, D.; Redfield, S. +40 more
Context. Centaurs, distinguished by their volatile-rich compositions, play a pivotal role in understanding the formation and evolution of the early Solar System, as they represent remnants of the primordial material that populated the outer regions. Stellar occultations offer a means to investigate their physical properties, including shape and ro…
Extensive Secondary Cratering From the InSight Sol 1034a Impact Event
Grindrod, P. M.; Daubar, I. J.; Collins, G. S. +10 more
Impact cratering is one of the fundamental processes throughout the history of the Solar System. The formation of new impact craters on planetary bodies has been observed with repeat images from orbiting satellites. However, the time gap between images is often large enough to preclude detailed analysis of smaller-scale features such as secondary …
Some observational properties of the Herbig Be Star AS 310
Bakış, Volkan; Alishov, S. A.; Ismailov, Nariman Z. +2 more
The results of spectral and photometric studies of Herbig Be-type star AS 310 have been presented. Photometric observations in the BVRcIc bands performed in 2016-2021 showed that the amplitude of the seasonal brightness variations of the star changes smoothly in different years and reaches a maximum of approximately around Δ V ∼ 0.6 mag in 2018. T…
An Inward-moving and Asymmetric Velocity Wave Detected in LAMOST-Gaia
Zhao, Gang; Chen, Yuqin; Wu, Wenbo +3 more
The phase space, as coded by kinematic parameters and chemical abundances, is crucial for understanding the formation of the Galactic disk. Using red giant stars from the Galactic thin disk with [Fe/H] > - 0.8 and low-α ratios identified in LAMOST-Gaia, we detect numerous ridges and undulations in the R-V ϕ diagram coded by median …