Published in The Astrophysical Journal
The youngest Galactic supernova remnant G1.9+0.3 shows a discrete feature between its radio and X-ray morphologies. The observed radio morphology features a single maximum in the north, while the X-ray observation shows two opposite “ears” on the east and west sides. Using 3D magnetohydrodynamical simulations, we investigate the formation of the di...
Published in The Astrophysical Journal
We analyze image and spectral data from ≈365 ks of observations from the Chandra X-ray Observatory of the nearby, edge-on starburst galaxy NGC 253 to constrain properties of the hot phase of the outflow. We focus our analysis on the −1.1 to +0.63 kpc region of the outflow and define several regions for spectral extraction where we determine best-fi...
Published in The Astrophysical Journal
Recently, Rozelot & Eren pointed out that the first solar gravitational moment (J 2) might exhibit a temporal variation. The suggested explanation is through the temporal variation of the solar rotation with latitude. This issue is deeper developed due to an accurate knowledge of the long-term variations in solar differential rotation regarding sol...
Published in The Astrophysical Journal
We present a model for the broadband radio-to-γ-ray spectral energy distribution of the compact radio source PKS 1718 − 49. Because of its young age (≃100 yr) and proximity (z = 0.014), PKS 1718 − 49 offers a unique opportunity to study the nuclear conditions and the jet/host galaxy feedback process at the time of the initial radio jet expansion. P...
Published in The Astrophysical Journal
Large and less-biased samples of star-forming galaxies are essential to investigate galaxy evolution. Hα emission line is one of the most reliable tracers of star-forming galaxies because its strength is directly related to recent star formation. However, it is observationally expensive to construct large samples of Hα emitters by spectroscopic or ...
Published in The Astrophysical Journal
We report a revised analysis for the radius, mass, and hot surface regions of the massive millisecond pulsar PSR J0740+6620, studied previously with joint fits to NICER and XMM-Newton data by Riley et al. (2021) and Miller et al. (2021). We perform a similar Bayesian estimation for the pulse-profile model parameters, except that instead of fitting ...
Published in The Astrophysical Journal
In this paper, we report the discovery of an isolated, peculiar compact cloud with a steep velocity gradient at 2.′6 northwest of Sgr A*. This “Tadpole” molecular cloud is unique owing to its characteristic head-tail structure in the position–velocity space. By tracing the CO J = 3–2 intensity peak in each velocity channel, we noticed that the kine...
Published in The Astrophysical Journal
Spatially resolved integral field spectroscopic maps in a sample of 532 S0 galaxies from the MaNGA survey have unveiled the existence of inner rings (〈R〉 ∼ 1 R e) betraying ongoing star formation in a number of these objects. Activity gradients averaged over bins of galactocentric radius up to ∼1.5 R e have been measured in the subspace defined by ...
Published in The Astrophysical Journal
Remote sensing of the Earth has demonstrated that photosynthesis is traceable as the vegetation red edge (VRE), which is a steep rise in the reflection spectrum of vegetation, and as solar-induced fluorescence. This study examines the detectability of biological fluorescence from two types of photosynthetic pigments, chlorophylls (Chls) and bacteri...
Published in The Astrophysical Journal
It has been well established in the local universe that galaxy properties differ based on the large-scale environment in which they reside. As luminous Lyα nebulae have been shown to trace overdense environments at z ∼ 2–3, comparing the properties of galaxies within Lyα nebulae systems to those in the field can provide insight into how and when lo...
