Search Publications
Mapping the core of the Tarantula Nebula with VLT-MUSE - III. A template for metal-poor starburst regions in the visual and far-ultraviolet
Castro, N.; Crowther, Paul A.
We present the integrated VLT-MUSE spectrum of the central 2 × 2 arcmin2 (30 × 30 pc2) of NGC 2070, the dominant giant H II region of the Tarantula Nebula in the Large Magellanic Cloud, together with an empirical far-ultraviolet spectrum constructed via LMC template stars from the ULLYSES survey and Hubble Tarantula Treasury …
Investigating the orbital evolution of the eccentric HMXB GX 301-2 using long-term X-ray light curves
Paul, Biswajit; Kumar, Manish; Rana, Vikram +1 more
We report the orbital decay rate of the high-mass X-ray binary GX 301-2 from an analysis of its long-term X-ray light curves and pulsed flux histories from CGRO/BATSE, RXTE/ASM, Swift/BAT, Fermi/GBM, and MAXI by timing the pre-periastron flares over a span of almost 30 yr. The time of arrival of the pre-periastron flares exhibits an energy depende…
Determining the parameters of the spiral arms of the Galaxy from kinematic tracers based on Gaia DR3 data
Akhmetov, V. S.; Fedorov, P. N.; Velichko, A. B. +2 more
We present the results of determining the parameters of the spiral arms of the Galaxy using the stars Gaia DR3, whose absolute magnitude is MG < 4, and which allow tracing spiral arms at large distances from the Sun. As tracers of spiral arms, we use the centroids of stellar spherical regions with a radius of 0.5 kpc, in which the de…
The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT - I. Discovery of seven new pulsars and two Pulsar Wind Nebula associations
Filipović, M. D.; Possenti, A.; Kramer, M. +17 more
The sensitivity of the MeerKAT radio interferometer is an opportunity to probe deeper into the population of rare and faint extragalactic pulsars. The TRAPUM (TRAnsients and PUlsars with MeerKAT) collaboration has conducted a radio-domain search for accelerated pulsars and transients in the Small Magellanic Cloud (SMC). This partially targeted sur…
Assembling a high-precision abundance catalogue of solar twins in GALAH for phylogenetic studies
Buder, Sven; Jofré, Paula; Aguilera-Gómez, Claudia +13 more
Stellar chemical abundances have proved themselves a key source of information for understanding the evolution of the Milky Way, and the scale of major stellar surveys such as GALAH have massively increased the amount of chemical data available. However, progress is hampered by the level of precision in chemical abundance data as well as the visua…
Properties of the gas escaping from a non-isothermal porous dust surface layer of a comet
Mottola, S.; Küppers, M.; Thomas, N. +6 more
Estimation of the properties of the sublimation products leaving the cometary nucleus is one of the significant questions in the study of the dusty-gas flow following the Rosetta mission. It is widely assumed that the temperature of the water molecules emitted is the temperature of ice directly exposed to the surface. However, it is the simplest n…
Simultaneous retrieval of orbital phase resolved JWST/MIRI emission spectra of the hot Jupiter WASP-43b: evidence of water, ammonia, and carbon monoxide
Irwin, Patrick G. J.; Bell, Taylor J.; Kreidberg, Laura +14 more
Spectroscopic phase curves of hot Jupiters measure their emission spectra at multiple orbital phases, thus enabling detailed characterization of their atmospheres. Precise constraints on the atmospheric composition of these exoplanets offer insights into their formation and evolution. We analyse four phase-resolved emission spectra of the hot Jupi…
Introducing the Condor Array Telescope - III. The expansion and age of the shell of the dwarf nova Z Camelopardalis, and detection of a second, larger shell
Zurek, David R.; Walter, Frederick M.; Rich, R. Michael +7 more
The existence of a vast nova shell surrounding the prototypical dwarf nova Z Camelopardalis (Z Cam) proves that some old novae undergo metamorphosis to appear as dwarf novae thousands of years after a nova eruption. The expansion rates of ancient nova shells offer a way to constrain both the time between nova eruptions and the time for post-nova m…
Scaling relations for globular cluster systems in early-type galaxies - III. The inner flattening of the radial distributions
Caso, Juan Pablo; Ennis, Ana Inés; De Bórtoli, Bruno Javier
The current properties of globular cluster systems (GCSs) in the nearby Universe are a consequence of an evolutionary history ruled by accretion and disruption processes. The analysis of scaling relations for GCSs is crucial for understanding the relevance of different physical processes involved in their origin and subsequent survival. In this wo…
TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +33 more
We present the confirmation of a hot super-Neptune with an exterior Neptune companion orbiting a bright (V = 10.1 mag) F-dwarf identified by the Transiting Exoplanet Survey Satellite (TESS). The two planets, observed in sectors 45, 46, and 48 of the TESS extended mission, are $4.74_{-0.14}^{+0.16}$ and $3.86_{-0.16}^{+0.17}$ R⊕ with $5.…