Search Publications
Missions
Journals
Publication Years
Simultaneous Evidence of Edge Collapse and Hub-filament Configurations: A Rare Case Study of a Giant Molecular Filament, G45.3+0.1
Dewangan, L. K.; Ojha, D. K.; Pirogov, L. E. +2 more
We study multiwavelength and multiscale data to investigate the kinematics of molecular gas associated with the star-forming complexes G045.49+00.04 (G45E) and G045.14+00.14 (G45W) in the Aquila constellation. An analysis of the FUGIN 13CO(1-0) line data unveils the presence of a giant molecular filament (GMF G45.3+0.1; length ~75 pc, m…
HD 133729: A blue large-amplitude pulsator in orbit around a main-sequence B-type star
Pigulski, A.; Kotysz, K.; Kołaczek-Szymański, P. A.
Blue large-amplitude pulsators (BLAPs) form a small group of hot objects pulsating in a fundamental radial mode with periods of the order of 30 min. Proposed evolutionary scenarios explain them as evolved low-mass stars: ∼0.3 M⊙ shell-hydrogen-burning objects with a degenerated helium core, more massive (0.5-0.8) M⊙ core-heli…
The Transmission Spectrum of WASP-17 b From the Optical to the Near-infrared Wavelengths: Combining STIS, WFC3, and IRAC Data Sets
Changeat, Quentin; Edwards, Billy; Morvan, Mario +6 more
We present the transmission spectrum of the inflated hot Jupiter WASP-17 b, observed with the STIS and WFC3 instruments aboard the Hubble Space Telescope, allowing for a continuous wavelength coverage from ~0.4 to ~1.7 µm. Observations taken with IRAC channels 1 and 2 on the Spitzer Space Telescope are also included, adding photometric measu…
TPHO: A Time-dependent Photoionization Model for AGN Outflows
Mehdipour, Missagh; Kaastra, Jelle; Kara, Erin +3 more
Outflows in active galactic nuclei (AGN) are considered a promising candidate for driving AGN feedback at large scales. However, without information on the density of these outflows we cannot determine how much kinetic power they are imparting to the surrounding medium. Monitoring the response of the ionization state of the absorbing outflows to c…
Total reflection of a flare-driven quasi-periodic extreme ultraviolet wave train at a coronal hole boundary
Shen, Yuandeng; Zhou, Chengrui; Zhou, Xinping +3 more
Context. A flare-driven quasi-periodic extreme ultraviolet wave train totally reflected at a coronal hole boundary was well imaged on both temporal and spatial scales by AIA/SDO.
Aims: We aim to investigate the driving mechanisms of the quasi-periodic wave train and demonstrate the total reflection effect at the coronal hole boundary.
Me…
Photospheric Prompt Emission From Long Gamma Ray Burst Simulations. II. Spectropolarimetry
Lazzati, Davide; Parsotan, Tyler
Although gamma ray bursts (GRBs) have been detected for many decades, the lack of knowledge regarding the radiation mechanism that produces the energetic flash of radiation, or prompt emission, from these events has prevented the full use of GRBs as probes of high-energy astrophysical processes. While there are multiple models that attempt to desc…
Validation of TESS exoplanet candidates orbiting solar analogues in the all-sky PLATO input catalogue
Piotto, Giampaolo; Wilson, Thomas G.; Collier Cameron, Andrew +6 more
The Transiting Exoplanet Survey Satellite (TESS) is focusing on relatively bright stars and has found thousands of planet candidates. However, mainly because of the low spatial resolution of its cameras (≈ 21 arcsec/pixel), TESS is expected to detect several false positives (FPs); hence, vetting needs to be done. Here, we present a follow-up progr…
Discovery of a Double Sequence of Blue Straggler Stars in the Core-collapsed Globular Cluster NGC 6256
Cadelano, Mario; Pallanca, Cristina; Dalessandro, Emanuele +3 more
We used a combination of high-resolution optical images acquired with the Hubble Space Telescope and near-IR wide-field data to investigate the stellar density profile and the population of blue straggler stars (BSSs) in the Galactic globular cluster NGC 6256, with the aim of probing its current stage of internal dynamical evolution. We found that…
An Absolute Calibration of the Near-infrared Period-Luminosity Relations of Type II Cepheids in the Milky Way and in the Large Magellanic Cloud
Breuval, Louise; Gieren, Wolfgang; Pietrzyński, Grzegorz +29 more
We present time-series photometry of 21 nearby type II Cepheids in the near-infrared J, H, and K s passbands. We use this photometry, together with the Third Gaia Early Data Release parallaxes, to determine for the first time period-luminosity relations (PLRs) for type II Cepheids from field representatives of these old pulsating star…
The SEDIGISM survey: The influence of spiral arms on the molecular gas distribution of the inner Milky Way
König, C.; Menten, K. M.; Henning, T. +23 more
The morphology of the Milky Way is still a matter of debate. In order to shed light on uncertainties surrounding the structure of the Galaxy, in this paper, we study the imprint of spiral arms on the distribution and properties of its molecular gas. To do so, we take full advantage of the SEDIGISM (Structure, Excitation, and Dynamics of the Inner …