Search Publications
A 260 pc resolution ALMA map of HCN(1–0) in the galaxy NGC 4321
Henshaw, Jonathan D.; Rosolowsky, Erik; Chevance, Mélanie +24 more
The property of star formation rate (SFR) is tightly connected to the amount of dense gas in molecular clouds. However, it is not fully understood how the relationship between dense molecular gas and star formation varies within galaxies and in different morphological environments. Most previous studies have typically been limited to kiloparsec-sc…
Binary Yellow Supergiants in the Magellanic Clouds. I. Photometric Candidate Identification
Drout, Maria R.; O'Grady, Anna J. G.; Gaensler, B. M. +3 more
Recent works have constrained the binary fraction of evolved populations of massive stars in local galaxies such as red supergiants and Wolf–Rayet stars, but the binary fraction of yellow supergiants (YSGs) in the Hertzsprung gap remains unconstrained. Binary evolution theory predicts that the Hertzsprung gap is home to multiple populations of bin…
Modeling Cassini UVIS Interplanetary Hydrogen Lyα Observations from 1999 to 2017
Pryor, Wayne R.; Esposito, Larry W.; Gladstone, G. Randall +3 more
The Cassini Orbiter Ultraviolet Imaging Spectrograph (UVIS) obtained interplanetary hydrogen Lyα observations from 1999 to 2017, with mid-2004 to 2017 observations obtained from Saturn orbit. During its Saturn orbital phase, the spacecraft moved from mostly downwind and sidewind in the heliosphere to upwind. We analyze the full set of observations…
New technique to select recent fast-quenching galaxies at z 2 using the optical colours
Kajisawa, Masaru; Toba, Yoshiki; Kubo, Mariko +4 more
Many massive quiescent galaxies have been discovered at z > 2 thanks to multiwavelength deep and wide surveys; however, substantial deep near-infrared spectroscopic observations are needed to constrain their star formation histories statistically. Here, we present a new technique to select quiescent galaxies with a short quenching time-scale (≤…
Coevolution and Nuclear Structure in the Dwarf Galaxy POX 52 Studied by Multiwavelength Data from Radio to X-Ray
Kawamuro, Taiki; Ricci, Claudio; Noda, Hirofumi +4 more
The nearby dwarf galaxy POX 52 at z = 0.021 hosts an active galactic nucleus (AGN) with a black hole (BH) mass of M BH ~ 105-6 M ⊙ and an Eddington ratio of ~0.1-1. This object provides the rare opportunity to study both AGN and host-galaxy properties in a low-mass highly accreting system. To do so, we collected it…
Measuring the stellar and planetary parameters of the 51 Eridani system
Mann, Andrew W.; von Braun, Kaspar; Schaefer, Gail +3 more
In order to study exoplanets, a comprehensive characterisation of the fundamental properties of the host stars – such as angular diameter, temperature, luminosity, and age, is essential, as the formation and evolution of exoplanets are directly influenced by the host stars at various points in time. In this paper, we present interferometric observ…
How Well is the International Celestial Reference System Maintained in Official IAU Implementations?
Malkin, Zinovy
The International Celestial Reference Frame (ICRF) based on the VLBI-derived positions of 608 extragalactic radio sources was adopted by the International Astronomical Union (IAU) in 1998 as the first realization of the International Celestial Reference System (ICRS). Later, in 2009 and 2020, two extended ICRF versions, ICRF2 and ICRF3, respective…
Deciphering the hidden structures of HH 216 and Pillar IV in M16: results from JWST and HST
Dewangan, L. K.; Padovani, M.; Pandey, Rakesh +6 more
To probe the star formation process, we present an observational investigation of the Pillar IV and an ionized knot HH 216 in the Eagle Nebula (M16). Pillar IV is known to host a Class I protostar that drives a bipolar outflow. The outflow has produced the bow shock, HH 216, which is associated with the red-shifted outflow lobe. The JWST near- and…
Tidal tails of open clusters
Kos, Janez
Context. Open clusters that emerged from the star-forming regions as gravitationally bound structures are subjected to star evaporation, ejection, and tidal forces throughout the rest of their lives. Consequently, they form tidal tails that can stretch kiloparsecs along the cluster's orbit. Aims. Cluster members are typically found by searching fo…
The treasure behind the haystack: MUSE analysis of five recently discovered globular clusters
Fabbro, S.; Zoccali, M.; Rojas-Arriagada, A. +10 more
Context. After the second data release of Gaia, the number of new globular cluster candidates has increased significantly. However, most of them need to be properly characterised, both spectroscopically and photometrically, by means of radial velocities, metallicities, and deeper photometric observations.
Aims: Our goal is to provide an indep…