Search Publications
A Multiwavelength View of IC 860: What Is in Action inside Quenching Galaxies
Heckman, Timothy; Aalto, Susanne; French, K. Decker +15 more
We present a multiwavelength study of IC 860, a nearby post-starburst galaxy at the early stage of transitioning from blue and star forming to red and quiescent. Optical images reveal a galaxy-wide, dusty outflow originating from a compact core. We find evidence for a multiphase outflow in the molecular and neutral gas phase from the CO position-v…
Modelling the stellar halo with RR-Lyrae stars
Li, Chengdong; Binney, James
A seven-parameter distribution function (DF) is fitted to $20\, 000$ RR-Lyrae stars for which only astrometric data are available. The observational data are predicted by the DF in conjunction with the gravitational potential of a self-consistent model Galaxy defined by DFs for the dark halo, the bulge, and a four-component disc. Tests of the tech…
Atmospheric mass-loss and stellar wind effects in young and old systems - I. Comparative 3D study of TOI-942 and TOI-421 systems
Carleo, Ilaria; Vidotto, Aline A.; Kubyshkina, Daria +3 more
At young ages, when radiation from the host star is high, and the planet is hot and inflated after formation, planetary atmospheric mass-loss can be extremely strong compared to older planets. In turn, stellar winds are faster and denser for young stars compared to evolved main-sequence stars. Their interaction with escaping planetary atmospheres …
Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ∼0.5 AU
Lynch, Benjamin J.; Palmerio, Erika; Stevens, Michael L. +5 more
Streamer-blowout coronal mass ejections (SBO-CMEs) are the dominant CME population during solar minimum. Although they are typically slow and lack clear low-coronal signatures, they can cause geomagnetic storms. With the aid of extrapolated coronal fields and remote observations of the off-limb low corona, we study the initiation of an SBO-CME pre…
Lyα Halos around [O III]-selected Galaxies in HETDEX
Finkelstein, Steven L.; Schneider, Donald P.; Gebhardt, Karl +13 more
We present extended Lyα emission out to 800 kpc of 1034 [O III]-selected galaxies at redshifts 1.9 < z < 2.35 using the Hobby-Eberly Telescope Dark Energy Experiment. The locations and redshifts of the galaxies are taken from the 3D-HST survey. The median-stacked surface brightness profile of the Lyα emission of the [O III]-selected galaxies…
The Donor of the Black Hole X-Ray Binary MAXI J1820+070
Mikołajewska, Joanna; Casares, Jorge; Zdziarski, Andrzej A. +2 more
We estimate the parameters of the donor of the accreting black hole binary MAXI J1820+070. The measured values of the binary period, rotational and radial velocities, and constraints on the orbital inclination imply the donor is a subgiant with the mass of ${M}_{2}\approx {0.49}_{-0.10}^{+0.10}{M}_{\odot }$ and the radius of ${R}_{2}\approx {1.19}…
A first glimpse at the line-of-sight structure of the Milky Way's nuclear stellar disc
Nogueras-Lara, F.
Context. The nuclear stellar disc (NSD) is a dense stellar structure at the centre of our Galaxy. Given its proximity, it constitutes a unique laboratory to understand other galactic nuclei. Nevertheless, the high crowding and extinction hamper its study, and even its morphology and kinematics are not yet totally clear.
Aims: In this work we …
The photo-astrometric vertical tracer density of the Milky Way - II. Results from Gaia
Everall, Andrew; Boubert, Douglas; Grand, Robert J. J. +2 more
We use Gaia photometry and astrometry to estimate the vertical spatial structure of the Milky Way at the Solar radius, formally accounting for sample incompleteness (the selection function) and parallax measurement uncertainty. Our results show impressive precision demonstrating the power of the Gaia data. However, systematic errors dominate the p…
The evolution of temperature and density structures of OB cluster-forming molecular clumps
Liu, H. B.; Menten, K. M.; Csengeri, T. +4 more
Context. OB star clusters originate from parsec-scale massive molecular clumps, while individual stars may form in ≲0.1 pc scale dense cores. The thermal properties of the clump gas are key factors governing the fragmentation process, and are closely affected by gas dynamics and feedback of forming stars.
Aims: We aim to understand the evolut…
MADYS: the Manifold Age Determination for Young Stars. I. Isochronal age estimates and model comparison
Bonavita, M.; Squicciarini, V.
Context. The unrivalled astrometric and photometric capabilities of the Gaia mission have given new impetus to the study of young stars: both from an environmental perspective, as members of comoving star-forming regions, and from an individual perspective, as targets amenable to planet-hunting direct-imaging observations.
Aims: In view of th…