Search Publications
Evolution of the atomic component in protostellar outflows
Eislöffel, J.; Krabbe, A.; Nisini, B. +3 more
Context. We present SOFIA/FIFI-LS observations of three Class 0 and one Class I outflows (Cep E, HH 1, HH 212, and L1551 IRS5) in the far-infrared [O I]63 µm and [O I]145 µm transitions. Spectroscopic [O I]63 µm maps enabled us to infer the spatial extent of warm (T ∼ 500−1200 K), low-excitation a…
Toward a 3D kinetic tomography of Taurus clouds. I. Linking neutral potassium and dust
Hottier, C.; Lallement, R.; Vergely, J. L. +1 more
Context. Gaia parallaxes and photometric measurements open a three-dimensional (3D) era for the Milky Way, including its interstellar (IS) matter. Three-dimensional Galactic dust distributions are constructed in various ways, based on Gaia data and photometric or spectroscopic surveys.
Aims: The assignment of radial motions to IS dust structu…
Simultaneous photometric and CARMENES spectroscopic monitoring of fast-rotating M dwarf GJ 3270. Discovery of a post-flare corotating feature
Amado, P. J.; Caballero, J. A.; Czesla, S. +33 more
Context. Active M dwarfs frequently exhibit large flares, which can pose an existential threat to the habitability of any planet in orbit in addition to making said planets more difficult to detect. M dwarfs do not lose angular momentum as easily as earlier-type stars, which maintain the high levels of stellar activity for far longer. Studying you…
KMT-2019-BLG-0797: Binary-lensing event occurring on a binary stellar system
Han, Cheongho; Lee, Chung-Uk; Zang, Weicheng +18 more
Aims: We analyze the microlensing event KMT-2019-BLG-0797. The light curve of the event exhibits two anomalous features from a single-lens single-source model, and we aim to reveal the nature of the anomaly.
Methods: It is found that a model with two lenses plus a single source (2L1S model) can explain one feature of the anomaly, but the…
An intriguing globular cluster in the Galactic bulge from the VVV survey
Minniti, D.; Saito, R. K.; Alonso-García, J. +7 more
Context. Globular clusters (GCs) are the oldest objects known in the Milky Way, so each discovery of a new GC is astrophysically important. In the inner Galactic bulge regions these objects are difficult to find due to extreme crowding and extinction. However, recent near-IR surveys have discovered a number of new bulge GC candidates that need to …
The Venus Express observation of Venus' induced magnetosphere boundary at solar maximum
Zhang, T. L.; Wang, X.; Rong, Z. J. +9 more
The Venusian plasma environment is divided into two distinct regions by the induced magnetosphere boundary (IMB): the domain of solar wind protons and the domain of local planetary ions. Previous studies on the identification of the IMB gave various IMB definitions. Here we study the well-structured Venusian IMB with a sudden magnetic field rotati…
Long-term X-ray evolution of SDSS J134244.4+053056.1. A more than 18 year-old, long-lived IMBH-TDE candidate
Shu, X. W.; Wang, T. G.; He, J. S. +5 more
SDSS J134244.4+053056 is a tidal disruption event candidate with strong temporal coronal line emitters and a long fading, mid-infrared dust echo. We present detailed analyses of X-ray emission from a Swift/XRT observation in 2009 and the most recent XMM-Newton/pn observation in 2020. The two spectra can be modeled with hard and soft components. Wh…
IRIS observations of chromospheric heating by acoustic waves in solar quiet and active regions
Heinzel, P.; Liu, W.; Švanda, M. +3 more
Aims: To study the heating of solar chromospheric magnetic and nonmagnetic regions by acoustic and magnetoacoustic waves, the deposited acoustic-energy flux derived from observations of strong chromospheric lines is compared with the total integrated radiative losses.
Methods: A set of 23 quiet-Sun and weak-plage regions were observed in…
Stellar kinematics in the nuclear regions of nearby LIRGs with VLT-SINFONI. Comparison with gas phases and implications for dynamical mass estimations
Colina, L.; Arribas, S.; Pereira-Santaella, M. +3 more
Context. Nearby luminous infrared galaxies (LIRGs) are often considered to be the local counterpart of the star forming galaxy (SFG) population at z > 1. Therefore, local LIRGs are ideal systems with which to perform spatially resolved studies on the physical processes that govern these objects and to validate assumptions made in high-z studies…
Evidence for SO2 latitudinal variations below the clouds of Venus
Bézard, B.; Marcq, E.; Amine, I. +1 more
Context. Sulphur dioxide (SO2) is highly variable above the clouds of Venus, yet no spatial or temporal variability below the clouds had been known until now.
Aims: In order to constrain Venus's atmospheric circulation and chemistry (including possible volcanic outgassing), more accurate SO2 measurements below the clouds…