Search Publications
Identification of large equivalent width dusty galaxies at 4 < z < 6 from sub-millimetre colours
Buat, V.; Boquien, M.; Burgarella, D. +8 more
Context. Infrared (IR), sub-millimetre (sub-mm), and millimetre (mm) databases contain a huge quantity of high-quality data. However, a large part of these data are photometric, and they are thought not to be useful to derive quantitative information on the nebular emission of galaxies.
Aims: The aim of this project is first to identify galax…
Gaia Focused Product Release: Spatial distribution of two diffuse interstellar bands
Prusti, T.; Mazeh, T.; Zucker, S. +402 more
Diffuse interstellar bands (DIBs) are absorption features seen in optical and infrared spectra of stars and extragalactic objects that are probably caused by large and complex molecules in the galactic interstellar medium (ISM). Here we investigate the Galactic distribution and properties of two DIBs identified in almost six million stellar spectr…
Multi-point study of the energy release and impulsive CME dynamics in an eruptive C7 flare
Krucker, Säm; Veronig, Astrid M.; Podladchikova, Tatiana +6 more
Context. The energy release in eruptive flares and the kinematics of the associated coronal mass ejections (CMEs) are interlinked and require favorable observing positions as both on-disk and off-limb signatures are necessary to characterize these events.
Aims: We combine observations from different vantage points to perform a detailed study …
The possible evolution of pitch angles of spiral galaxies
Reshetnikov, V. P.; Marchuk, A. A.; Mosenkov, A. V. +2 more
Aims: The origin and maintenance of spiral structure in galaxies, the correlation between different types of spiral structure and several proposed mechanisms for their generation, and the evolution of spiral arms of galaxies with time are questions that are still controversial. In this note we study the spiral structure in a sample of distant…
The star in RNO 54: A possible post-FUor with a short faint jet
Moiseev, A. V.; Magakian, T. Yu.; Movsessian, T. A. +2 more
Aims: The aim of the present study is to analyze the spectra of an unusual pre-main sequence star in the cometary nebula RNO 54, which is suspected by several researchers to be a FUori-like object.
Methods: We performed long-slit spectroscopy of the star using the 6m telescope with the SCORPIO-2 multi-mode focal reducer.
Results: We…
Radio continuum and OH line emission of high-z OH megamaser galaxies
Zhu, Ming; Jiang, Peng; Zhang, Bo +8 more
We present a study of the arcsecond-scale radio continuum and OH line emission of a sample of known OH megamaser (OHM) galaxies with z ≥ 0.15 using archival Very Large Array (VLA) data and also the results of our pilot Five-hundred-meter Aperture Spherical radio Telescope (FAST) observations of 12 of these OHM galaxies. The arcsecond-scale resolut…
Orbital parallax of binary systems compared to Gaia DR3 and the parallax zero-point offset at bright magnitudes
Groenewegen, M. A. T.
Multiple systems for which the astrometric and spectroscopic orbit are known offer the unique possibility of determining the distance to these systems directly without any assumptions. They are therefore ideal objects for a comparison of Gaia data release 3 (GDR3) parallax data, especially since GDR3 presents the results of the non-single star (NS…
The galaxy counterpart and environment of the dusty damped Lyman-α absorber at z = 2.226 towards Q 1218+0832
Östlin, G.; Milvang-Jensen, B.; Fynbo, J. P. U. +8 more
We report on further observations of the field of the quasar Q 1218+0832. Geier et al. (2019, A&A, 625, L9) presented the discovery of the quasar resulting from a search for quasars reddened and dimmed by dust in foreground damped Lyman-α absorbers (DLAs). The DLA is remarkable by having a very large H I column density close to 1022…
Photometric follow-up of the 20 Myr old multi-planet host star V1298 Tau with CHEOPS and ground-based telescopes
Béjar, V. J. S.; Zapatero Osorio, M. R.; Scandariato, G. +25 more
Context. The 20 Myr old star V1298 Tau hosts at least four planets. Since its discovery, this system has been a target of intensive photometric and spectroscopic monitoring. To date, the characterisation of its architecture and planets' fundamental properties has been very challenging.
Aims: The determination of the orbital ephemeris of the o…
Dark dust. III. The high-quality single-cloud reddening curve sample: Scrutinizing extinction curves in the Milky Way
Krełowski, J.; Siebenmorgen, R.; Chini, Rolf +2 more
The nature of dust in the diffuse interstellar medium can be best investigated by means of reddening curves where only a single interstellar cloud lies between the observer and the background source. Published reddening curves often suffer from various systematic uncertainties. We merged a sample of 820 reddening curves of stars for which both FOR…