Search Publications
Self-similar Buildup and Inside-out Growth: Tracing the Evolution of Intermediate-to-high-mass Star-forming Galaxies since z = 2
Tacchella, Sandro; Mosleh, Moein; Hosseini-ShahiSavandi, S. Zahra +1 more
We aim to discern scenarios of structural evolution of intermediate-to-high-mass star-forming galaxies (SFGs) since cosmic noon by comparing their stellar mass profiles with present-day stellar masses of
The Age-dependent Vertical Actions of Young Stars in the Galaxy
Xiang, Maosheng; Rix, Hans-Walter; Zari, Eleonora +2 more
Stars in the Galactic disk are born on cold, nearly circular orbits with small vertical excursions. After their birth, their orbits evolve, driven by small- or large-scale perturbations in the Galactic disk's gravitational potential. Here, we study the vertical motions of young stars over their first few orbital periods, using a sample of OBA star…
The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc
Skiff, Brian A.; Hartman, Zachary D.; Ciardi, David R. +8 more
M dwarfs are ubiquitous in our Galaxy, and the rate at which they host stellar companions, and the properties of these companions, provide a window into the formation and evolution of the star(s), and of any planets that they may host. The Pervasive Overview of "Kompanions" of Every M dwarf in Our Neighborhood (POKEMON) speckle survey of nearby M …
The Molecular Exoskeleton of the Ring-like Planetary Nebula NGC 3132
Wilner, David J.; De Marco, Orsola; Kastner, Joel H. +4 more
We present Submillimeter Array (SMA) mapping of 12CO J = 2 → 1, 13CO J = 2 → 1, and CN N = 2 → 1 emission from the ring-like planetary nebula NGC 3132, one of the subjects of JWST Early Release Observation near-infrared imaging. The ∼5″ resolution SMA data demonstrate that the Southern Ring's main, bright, molecule-rich ring …
Binary neutron star merger offsets from their host galaxies: GW 170817 as a case study
Lyman, J. D.; Levan, A. J.; Chrimes, A. A. +2 more
Aims. The locations of binary neutron star (BNS) mergers within their host galaxies encode the systemic kicks that these systems received in the supernova aftermath. We investigate how the galactic potential and the systemic kicks shape the offset distribution of BNS mergers with a case study of GW 170817 and its host NGC 4993. Methods. We derived…
The ZTF Source Classification Project. III. A Catalog of Variable Sources
Riddle, Reed; Szkody, Paula; Graham, Matthew J. +22 more
The classification of variable objects provides insight into a wide variety of astrophysics ranging from stellar interiors to galactic nuclei. The Zwicky Transient Facility (ZTF) provides time-series observations that record the variability of more than a billion sources. The scale of these data necessitates automated approaches to make a thorough…
Multiwavelength Spectral Energy Distribution Analysis of X-Ray Selected Active Galactic Nuclei at z = 0.2–0.8 in the Stripe 82 Region
Ueda, Yoshihiro; Toba, Yoshiki; Li, Junyao +3 more
We perform a systematic, multiwavelength spectral energy distribution (SED) analysis of X-ray detected active galactic nuclei (AGNs) at z = 0.2–0.8 with Sloan Digital Sky Survey (SDSS) counterparts in the Stripe 82 region, consisting of 60 type 1 and 137 type 2 AGNs covering a 2–10 keV luminosity range of $41.6\lt \mathrm{log}\ {L}_{{\rm{x}}}\lt 4…
Fractionation in young cores: Direct determinations of nitrogen and carbon fractionation in HCN
Caselli, P.; Jensen, S. S.; Spezzano, S. +4 more
Context. Nitrogen fractionation is a powerful tracer of the chemical evolution during star and planet formation. It requires robust determinations of the nitrogen fractionation across different evolutionary stages.
Aims: We aim to determine the 14N/15N and 12C/13C ratios for HCN in six starless and …
Updated Kinematics of the Radcliffe Wave: Nonsynchronous, Dipole-like Vertical Oscillations
Fang, Min; Li, Guang-Xing; Wang, Junzhi +6 more
The kinematic information of the Radcliffe wave (RW) is essential for determining its existence and gaining insights into its origin and evolution. In this work, we present an accurate measurement of the vertical velocity (V Z ) of the RW by incorporating the radial velocity (RV) measures through two methods, which is crucial but was n…
NIR spectral classification of the companion in the gamma-ray binary HESS J1832-093 as an O6 V star
Papitto, A.; Negueruela, I.; de Oña Wilhelmi, E. +3 more
HESS J1832-093 is a member of the rare class of gamma-ray binaries, as recently confirmed by the detection of orbitally modulated X-ray and gamma-ray emission with a period of ~86 d. The spectral type of the massive companion star has been difficult to retrieve as there is no optical counterpart, but the system is coincident with a near-infrared s…