Search Publications
Extended Lyman-α emission towards the SPT2349-56 protocluster at z = 4.3
Anguita, Timo; Spilker, Justin; Aravena, Manuel +20 more
Context. Deep spectroscopic surveys with the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed that some of the brightest infrared sources in the sky correspond to concentrations of submillimeter galaxies (SMGs) at high redshift. Among these, the SPT2349-56 protocluster system is amongst the most extreme examples given its high sou…
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…
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…
Photometric segregation of dwarf and giant FGK stars using the SVO Filter Profile Service and photometric tools
Dupke, Renato; Varela, Jesús; Cenarro, Javier +18 more
Aims. This paper is focused on the segregation of FGK dwarf and giant stars through narrow-band photometric data using the Spanish Virtual Observatory (SVO) Filter Profile Service and associated photometric tools. Methods. We selected spectra from the MILES, STELIB, and ELODIE stellar libraries, and used SVO photometric tools to derive the synthet…
JWST's PEARLS: Resolved study of the stellar and dust components in starburst galaxies at cosmic noon
Kneissl, R.; Berta, S.; Ryan, R. E. +35 more
Dusty star-forming galaxies (DSFGs) significantly contribute to the stellar buildup in galaxies during "cosmic noon," the peak epoch of cosmic star formation. Major mergers and gas accretion are often invoked to explain DSFGs' prodigious star formation rates (SFRs) and large stellar masses. We conducted a spatially resolved morphological analysis …
The longevity of the oldest open clusters. Structural parameters of NGC 188, NGC 2420, NGC 2425, NGC 2682, NGC 6791, and NGC 6819
Jordi, C.; Silva-Villa, E.; Vallenari, A. +5 more
Context. The dynamical evolution of open clusters is driven by stellar evolution, internal dynamics, and external forces, which according to dynamical simulations will lead to their evaporation over a timescale of about 1 Ga. However, about 10% of the known open clusters are older. These latter are special systems whose detailed properties are rel…
Comparing bulge RR Lyrae stars with bulge giants: Insight from 3D kinematics
Zoccali, M.; Valenti, E.; Contreras Ramos, R. +6 more
Context. The structure and kinematics of the old component of the Galactic bulge are still a matter of debate. It is clear that the bulk of the bulge as traced by red clump stars includes two main components, which are usually identified as the metal-rich and metal-poor components. They have different shapes, kinematics, mean metallicities, and al…