Search Publications
ALMA reveals a dust-obscured galaxy merger at cosmic noon
Ginolfi, M.; Valentino, F.; Popping, G. +3 more
Context. Galaxy mergers play a critical role in galaxy evolution. They alter the size, morphology, dynamics, and composition of galaxies. Galaxy mergers have so far mostly been identified through visual inspection of their rest-frame optical and near-IR (NIR) emission. Dust can obscure this emission, however, resulting in the misclassification of …
Filament eruption by multiple reconnections
Liu, Y.; Chen, Y.; Schmieder, B. +5 more
Context. Filament eruption is a common phenomenon in solar activity, but the triggering mechanism is not well understood.
Aims: We focus our study on a filament eruption located in a complex nest of three active regions close to a coronal hole.
Methods: The filament eruption is observed at multiple wavelengths: by the Global Oscillation …
New stellar age estimates using SPInS based on Gaia DR3 photometry and LAMOST DR8 abundances
Reese, D. R.; Casamiquela, L.; Anders, F. +8 more
Context. Reliable stellar age estimates are fundamental for testing several problems in modern astrophysics, in particular since they set the timescales of Galactic dynamical and chemical evolution. Aims. In this study, we determine ages using only Gaia DR3 photometry and parallaxes, in combination with interstellar extinction maps, and spectrosco…
ESO 137–001: A jellyfish galaxy model
Boselli, A.; Sun, M.; Fossati, M. +2 more
Ram-pressure stripping of the spiral galaxy ESO 137‑001 within the highly dynamical intracluster medium (ICM) of the Norma cluster lead to spectacular extraplanar CO, optical, Hα, UV, and X-ray emission. The Hα and X-ray tails extend up to 80 kpc from the galactic disk. We present dynamical simulations of the ram-pressure stripping event, and inve…
Modifications of astrophysical ices induced by cosmic rays. I. Water, carbon monoxide, and methanol mixtures
da Silveira, E. F.; Rothard, H.; Domaracka, A. +3 more
Aims: Astrophysical ices on dust grain mantles in the interstellar medium (ISM) and dense circumstellar envelopes (CSEs) are continuously exposed to galactic cosmic rays (GCRs). In a laboratory setting, we studied the physical and chemical modifications of ice layers induced by energetic heavy ions as GCR analogues. The ice layers used have a…
Photometric properties of classical bulge and pseudo-bulge galaxies at 0.5 ≤ z < 1.0
Hu, Jia; Cui, Qifan; Wang, Lan +2 more
Context. We compare the photometric properties and specific star formation rate (sSFR) of classical- and pseudo-bulge galaxies with M∗ ≥ 109.5 M⊙ at 0.5 ≤ z < 1.0, selected from all five CANDELS fields. We also compare these properties of bulge galaxies at lower redshift selected from MaNGA survey in previous wo…
Exploring the nature of an ultraluminous X-ray source in NGC 628
Avdan, S.; Avdan, H.
Aims. In this work, we study the X-ray spectral and temporal properties of an ultraluminous X-ray source (ULX) in NGC 628 by using multi-epoch archival X-ray data. The physical parameters were estimated in each epoch in order to constrain the nature of the compact object in the system. Also, the optical counterpart candidates of the ULX were exami…
An interferometric search for SiO maser emission in planetary nebulae
Miranda, Luis F.; Osorio, Mayra; Anglada, Guillem +5 more
Context. Maser emission of SiO, H2O, and OH is widespread in asymptotic giant branch (AGB) stars with oxygen- (O-) rich envelopes. This emission quickly disappears during the post-AGB phase and is extremely rare in planetary nebulae (PNe). So far, only eight PNe have been confirmed to show OH and/or H2O maser emission, and no…
New orbital periods of high-inclination dwarf novae based on Gaia Alerts photometry
Vogt, N.; Zorotovic, M.; Vega-Manubens, I. +8 more
The orbital period of a cataclysmic variable stands as a crucial parameter for investigating the structure and physics of these binary systems, as well as understanding their evolution. We use photometric Gaia data for dwarf novae (DNe) in the quiescent state – which are available for a number of years – to determine new orbital periods and improv…
Long- and short-term variability of the possible nascent planetary nebula IRAS 22568+6141: A late thermal pulse?
Miranda, Luis F.; Morisset, Christophe; Cala, Roldán A. +4 more
IRAS 22568+6141 has been classified as a low-excitation planetary nebula (PN) and presents non-thermal radio continuum emission, which could be a signature of a nascent PNe. We present intermediate-resolution long-slit spectra obtained in 2021 and 2023, high-resolution long-slit spectra taken in 2023, and a light curve at the r filter between 1953…