Search Publications
Lack of Correlations between Cold Molecular Gas and AGN Properties in Type 1 AGNs at z ≲ 0.5
Ho, Luis C.; Bauer, Franz E.; Treister, Ezequiel +3 more
We present new NOrthern Extended Millimeter Array (NOEMA) observations of the CO(2-1) emission in eight of the brightest Palomar-Green quasars at z ≲ 0.5 to investigate the role of active galactic nucleus (AGN) feedback in luminous quasars detected at low redshifts. We detect CO(2-1) emission in three objects, from which we derive CO luminosities,…
Detection of TiO and VO in the Atmosphere of WASP-121b and Evidence For its Temporal Variation
Zhao, Gang; Wang, Wei; Zhao, Fei +6 more
We report the transit observations of the ultra-hot Jupiter WASP-121b using the Goodman High Throughput Spectrograph at the 4 m ground-based Southern Astrophysical Research Telescope, covering the wavelength range 502-900 nm. By dividing the target and reference star into 19 spectroscopic passbands and applying differential spectrophotometry, we d…
The evolution of the internal structure of massive star-forming regions in the Milky Way as revealed by ALMA
Dib, Sami
We analyse the structure of 15 protocluster forming regions in the Milky Way using their 1.3 mm continuum emission maps from the ALMA-IMF large program. The analysis of the cloud structure is performed using the delta-variance spectrum technique. The calculated spectra display a self-similar regime on small scales as well as the presence of a prom…
A Multiwavelength Light-curve Analysis of the Classical Nova YZ Ret: An Extension of the Universal Decline Law to the Nebular Phase
Kato, Mariko; Hachisu, Izumi
YZ Ret is the first X-ray flash detected classical nova, and is also observed in optical, X-ray, and gamma-ray. We propose a comprehensive model that explains the observational properties. The white dwarf mass is determined to be ~1.33 M ☉, which reproduces the multiwavelength light curves of YZ Ret, from optical, X-ray, to gamma-ray. W…
Exploring the low-mass regime of galaxy-scale strong lensing: Insights into the mass structure of cluster galaxies
Grillo, C.; Rosati, P.; Vanzella, E. +8 more
Context. Several recent studies have highlighted a discrepancy between the strong lensing (SL) properties of observed cluster galaxies and the predictions of Λ cold dark matter (CDM) cosmological hydrodynamical simulations. This discrepancy can be interpreted as the result of observed cluster members being more compact than their simulated counter…
A CO funnel in the Galactic centre: Molecular counterpart of the northern Galactic chimney
Menten, K. M.; Schilke, P.; Fuller, G. A. +7 more
We report the discovery of a velocity coherent, funnel-shaped 13CO emission feature in the Galactic centre (GC) using data from the SEDIGISM survey. The molecular cloud appears as a low-velocity structure (VLSR = [ − 3.5, + 3.5] km s−1) with an angular extent of 0.95° ×1°, extending towards positive Galactic latitu…
TOI-4600 b and c: Two Long-period Giant Planets Orbiting an Early K Dwarf
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +31 more
We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 (V = 12.6, T = 11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Transit Planet Candidate Working Group. The inner planet, TOI-4600 b, has a radius of 6.80 ± 0.31 R ⊕
Metallicities of Classical Cepheids in the Inner Galactic Disk
Matsunaga, Noriyuki; D'Orazi, Valentina; McWilliam, Andrew +14 more
Metallicity gradients refer to the sloped radial profiles of the metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which are good stellar tracers thanks to their period-luminosity relation, allowing precise distance …
A High-precision Survey of the D/H Ratio in the Nearby Interstellar Medium
Tripp, Todd M.; Jenkins, Edward B.; Chayer, Pierre +4 more
We present high signal-to-noise ratio measurements of the H I Lyα absorption line toward 16 Galactic targets that are at distances between approximately 190 and 2200 pc, all beyond the wall of the Local Bubble. We describe the models used to remove stellar emission and absorption features and the methods used to account for all known sources of er…
A Tale of Three Dwarfs: No Extreme Cluster Formation in Extreme Star-forming Galaxies
Whitmore, Bradley C.; Chandar, Rupali; Ubeda, Leonardo +8 more
Nearly all current simulations predict that outcomes of the star formation process, such as the fraction of stars that form in bound clusters (Γ), depend on the intensity of star formation activity (ΣSFR) in the host galaxy. The exact shape and strength of the predicted correlations, however, vary from simulation to simulation. Observat…