Search Publications
GALExtin: an alternative online tool to determine the interstellar extinction in the Milky Way
Moitinho, André; Amôres, Eduardo B.; Jesus, Ricardo M. +6 more
Estimates of interstellar extinction are essential in a broad range of astronomical research. In the last decades, several maps and models of the large-scale interstellar extinction in the Galaxy have been published. However, these maps and models have been developed in different programming languages, with different user interfaces and input/outp…
A Spitzer survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time
Surace, J. A.; Clements, D. L.; van Kampen, E. +60 more
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will observe several Deep Drilling Fields (DDFs) to a greater depth and with a more rapid cadence than the main survey. In this paper, we describe the 'DeepDrill' survey, which used the Spitzer Space Telescope Infrared Array Camera (IRAC) to observe three of the four currently de…
Differentiating modern and prebiotic Earth scenarios for TRAPPIST-1e: high-resolution transmission spectra and predictions for JWST
MacDonald, Ryan J.; Lin, Zifan; Kaltenegger, Lisa +1 more
The TRAPPIST-1 system is a priority target for terrestrial exoplanet characterization. TRAPPIST-1e, residing in the habitable zone, will be observed during the James Webb Space Telescope (JWST) GTO Program. Here, we assess the prospects of differentiating between prebiotic and modern Earth scenarios for TRAPPIST-1e via transmission spectroscopy. U…
Towards a volumetric census of close white dwarf binaries - I. Reference samples
Pala, A. F.; Breedt, E.; Marsh, T. R. +3 more
Close white dwarf binaries play an important role across a range of astrophysics, including thermonuclear supernovae, the Galactic low-frequency gravitational wave signal, and the chemical evolution of the Galaxy. Progress in developing a detailed understanding of the complex, multithreaded evolutionary pathways of these systems is limited by the …
WISDOM Project - IX. Giant molecular clouds in the lenticular galaxy NGC 4429: effects of shear and tidal forces on clouds
Davis, Timothy A.; Bureau, Martin; Iguchi, Satoru +5 more
We present high spatial resolution (≈12 pc) Atacama Large Millimeter/submillimeter Array 12CO(J = 3-2) observations of the nearby lenticular galaxy NGC 4429. We identify 217 giant molecular clouds within the 450 pc radius molecular gas disc. The clouds generally have smaller sizes and masses but higher surface densities and observed lin…
The COMBS Survey - II. Distinguishing the metal-poor bulge from the halo interlopers
Kobayashi, Chiaki; Marino, Anna F.; Hawkins, Keith +9 more
The metal-poor stars in the bulge are important relics of the Milky Way's formation history, as simulations predict that they are some of the oldest stars in the Galaxy. In order to determine if they are truly ancient stars, we must understand their origins. Currently, it is unclear if the metal-poor stars in the bulge ([Fe/H] < -1 dex) are mer…
MUSEQuBES: characterizing the circumgalactic medium of redshift ≈3.3 Ly α emitters
Marino, Raffaella Anna; Wendt, Martin; Wisotzki, Lutz +7 more
We present the first characterization of the circumgalactic medium of Ly α emitters (LAEs), using a sample of 96 z ≈ 3.3 LAEs detected with the VLT/MUSE in fields centred on eight bright background quasars. The LAEs have low Ly α luminosities ($\sim 10^{42}\, \text{erg}\, \text{s}^{-1}$) and star formation rates (SFRs) $\sim 1~\text{M}_\odot \, \t…
The VMC Survey - XLII. Near-infrared period-luminosity relations for RR Lyrae stars and the structure of the Large Magellanic Cloud
Clementini, G.; Ripepi, V.; Garofalo, A. +11 more
We present results from an analysis of ~29 000 RR Lyrae stars located in the Large Magellanic Cloud (LMC). For these objects, near-infrared time-series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and optical data from the Optical Gravitational Lensing Experiment (OGLE) IV survey and the Gaia Data Release 2 catalogue of c…
Dust continuum, CO, and [C I] 1 - 0 lines: self-consistent H2 mass estimates and the possibility of globally CO-'dark' galaxies at z = 0.35
Dunne, L.; Gomez, H. L.; Maddox, S. J. +1 more
We present Atacama Large Millimetre Array observations of a small but statistically complete sample of 12 250-µm-selected galaxies at z = 0.35 designed to measure their dust submillimeter continuum emission as well as their $\rm {^{12}CO(1-0)}$ and atomic carbon [C I](3P1-3P0) spectral lines. This …
Blue straggler stars in open clusters using Gaia: dependence on cluster parameters and possible formation pathways
Jadhav, Vikrant V.; Subramaniam, Annapurni
Blue straggler stars (BSSs) are the most massive stars in a cluster formed via binary or higher order stellar interactions. Though the exact nature of such formation scenarios is difficult to pin down, we provide observational constraints on the different possible mechanism. In this quest, we first produce a catalogue of BSSs using Gaia DR2 data. …