Search Publications
Planetary nebulae seen with TESS: New and revisited short-period binary central star candidates from Cycles 1 to 4
Jones, David; Lillo-Box, Jorge; Aller, Alba
Context. High-precision and high-cadence photometric surveys such as Kepler or TESS are making huge progress not only in the detection of new extrasolar planets but also in the study of a great number of variable stars. This is the case for central stars of planetary nebulae (PNe), which have similarly benefited from the capabilities of these miss…
Internal magnetic field structures observed by PSP/WISPR in a filament-related coronal mass ejection
Temmer, M.; Veronig, A. M.; Bothmer, V. +7 more
Context. We investigated the coronal mass ejection (CME) related to an eruptive filament over the southwestern solar limb on December 8, 2022, at around 8 UT. We tracked localized density enhancements reflecting the magnetic structures using white-light data taken with the Wide-field Instrument for Solar PRobe (WISPR) aboard the Parker Solar Probe…
Exploring the origin of the distance bimodality of stars in the periphery of the Small Magellanic Cloud with APOGEE and Gaia
Monachesi, Antonela; Choi, Yumi; Majewski, Steven R. +12 more
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, three-body interaction - the dynamical perturbation of the Small Magellanic Cloud (SMC) by the Large Magellanic Cloud (LMC), and spec…
A Quick Guide to Nearby Young Associations
Gagné, Jonathan
Nearby associations of stars which are coeval are important benchmark laboratories because they provide robust measurements of stellar ages. The study of such coeval groups makes it possible to better understand star formation by studying the initial mass function, the binary fraction or the circumstellar disks of stars, to determine how the initi…
Galaxy kinematics and mass estimates at z 1 from ionized gas and stars
Übler, Hannah; D'Eugenio, Francesco; Straatman, Caroline M. S. +14 more
We compare ionized gas and stellar kinematics of 16 star-forming galaxies (log (M⋆/M⊙) = 9.7-11.2, SFR =6 - 86 M⊙ yr-1) at z ~ 1 using near-infrared integral field spectroscopy (IFS) of Hα emission from the KMOS3D (the K-band Multi-Object Spectrograph 3D) survey and optical slit spectroscopy o…
White dwarf pollution: one star or two?
Toonen, Silvia; Hollands, Mark; Farihi, Jay +1 more
The accretion of tidally disrupted planetary bodies is the current consensus model for the presence of photospheric metals commonly detected in white dwarfs. While most dynamical studies have considered a single star and associated planetary instabilities, several investigations have instead considered the influence of widely bound stellar compani…
Physical Properties of Hyperluminous, Dust-obscured Quasars at z ∼ 3: Multiwavelength Spectral Energy Distribution Analysis and Cold Gas Content Revealed by ALMA
Chen, Guangwen; Knudsen, Kirsten K.; Zhang, Hong-Xin +3 more
We present a UV to millimeter spectral energy distribution (SED) analysis of 16 hyperluminous, dust-obscured quasars at z ∼ 3, selected by the Wide-field Infrared Survey Explorer. We aim to investigate the physical properties of these quasars, with a focus on their molecular gas content. We decompose the SEDs into three components: stellar, cold d…
The link among X-ray spectral properties, AGN structure, and the host galaxy
Stiele, H.; Georgantopoulos, I.; Carrera, F. J. +5 more
In this work, we compare the supermassive black hole (SMBH) and host galaxy properties of X-ray obscured and unobscured AGN. For that purpose, we used ∼35 000 X-ray detected AGN in the 4XMM-DR11 catalogue for which there are available measurements for their X-ray spectral parameters, such as the hydrogen column density, NH, and photon i…
MICONIC: JWST/MIRI MRS observations of the nuclear and circumnuclear regions of Mrk 231
Rouan, D.; Östlin, G.; Güdel, M. +22 more
We present JWST/MIRI MRS spatially resolved ∼5 ‑ 28 µm observations of the central ∼4 ‑ 8 kpc of the ultraluminous infrared galaxy and broad absorption line quasar Mrk 231. These are part of the Mid-Infrared Characterization of Nearby Iconic galaxy Centers (MICONIC) program of the MIRI European Consortium guaranteed time observations. No hig…
3D non-LTE modeling of the stellar center-to-limb variation for transmission spectroscopy studies. Na I D and K I resonance lines in the Sun
Amarsi, A. M.; Lind, K.; Kiselman, D. +5 more
Context. Transmission spectroscopy is one of the most powerful techniques used to characterize transiting exoplanets, since it allows for the abundance of the atomic and molecular species in the planetary atmosphere to be measured. However, stellar lines may bias the determination of such abundances if their center-to-limb variations (CLVs) are no…