Search Publications
A study of globular clusters in a lenticular galaxy in Hydra I from deep HST/ACS photometry
Blakeslee, John P.; Cantiello, Michele; Raimondo, Gabriella +4 more
Aims: We take advantage of exquisitely deep optical imaging data from the Hubble Space Telescope's Advanced Camera for Surveys (HST/ACS) in the F475W (gF475W) and F606W (VF606W) bands to study the properties of the globular cluster (GC) population in the intermediate-mass lenticular galaxy PGC 087327in the Hydra I galaxy…
Doppler shifts of spectral lines formed in the solar transition region and corona
Chen, Yajie; Tian, Hui; Peter, Hardi +2 more
Context. Emission lines formed in the transition region and corona dominantly show redshifts and blueshifts, respectively.
Aims: We investigate the Doppler shifts in a 3D radiation magnetohydrodynamic (MHD) model of the quiet Sun and compare these to observed properties. We concentrate on Si IV 1394 Å originating in the transition region and …
New view of the Balmer-Kapteyn region: Cryptomare distribution and formation
Li, Fei; Yan, Jianguo; Gao, Wutong +4 more
Context. The cryptomare in the Balmer-Kapteyn region is the oldest one on the Moon. Determining the extent and formation of this feature can deepen our understanding of early mare volcanism and help establish temporal and spatial constraints on lunar thermal and volcanic history.
Aims: This paper focuses on the identification of lunar cryptom…
Modelling the correlated keV/TeV light curves of Be/gamma-ray binaries
Takata, J.; Chen, A. M.
Be/γ-ray binaries comprise a confirmed or presumptive pulsar orbiting a Be star and emit luminous γ-rays. Non-thermal emissions are thought to arise from synchrotron radiation and inverse-Compton (IC) scattering in the shock where the pulsar wind is terminated by the stellar outflow. We study wind interactions and shock radiations from such system…
TESS discovery of a super-Earth and two sub-Neptunes orbiting the bright, nearby, Sun-like star HD 22946
Kostov, Veselin B.; Barclay, Thomas; Lester, Kathryn V. +51 more
We report the Transiting Exoplanet Survey Satellite (TESS) discovery of a three-planet system around the bright Sun-like star HD 22946 (V ≈ 8.3 mag), also known as TIC 100990000, located 63 pc from Earth. The system was observed by TESS in Sectors 3, 4, 30, and 31 and two planet candidates, labeled TESS Objects of Interest (TOIs) 411.01 (planet c)…
Comprehensive X-ray view of the active nucleus in NGC 4258
Celotti, A.; Boorman, P. G.; Masini, A. +1 more
Context. The presence of water masers orbiting around the active galactic nucleus (AGN) in NGC 4258, one of the most studied extragalactic objects, has been crucial in developing a detailed picture of its nuclear environment. Nonetheless, its accretion rate and bolometric luminosity are still matter of debate, as there are indications that NGC 425…
APOGEE-2S Mg-Al anti-correlation of the metal-poor globular cluster NGC 2298
Beers, Timothy C.; Minniti, Dante; Lane, Richard R. +6 more
We present detailed elemental abundances and radial velocities of stars in the metal-poor globular cluster (GC) NGC 2298, based on near-infrared high-resolution (R ∼ 22 500) spectra of 12 members obtained during the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) at Las Campanas Observatory as part of the seve…
Kinematics, structure and abundances of supernova remnant 0540-69.3
Lundqvist, P.; Shibanov, Yu. A.; Lundqvist, N.
Aims: Our goal is to investigate the structure, elemental abundances, physical conditions, and the immediate surroundings of supernova remnant 0540-69.3 in the Large Magellanic Cloud.
Methods: Imaging in [O III] and spectroscopic studies through various slits were carried out using European Souther Observatory's Very Large and New Techno…
FilDReaMS. II. Application to the analysis of the relative orientations between filaments and the magnetic field in four Herschel fields
Montier, L.; Ristorcelli, I.; Ferrière, K. +1 more
Context. Both simulations and observations of the interstellar medium show that the study of the relative orientations between filamentary structures and the magnetic field can bring new insight into the role played by magnetic fields in the formation and evolution of filaments and in the process of star formation.
Aims: We provide a first ap…
Chemical exploration of Galactic cold cores
Liu, Tie; Ceccarelli, Cecilia; Juvela, Mika +6 more
Context. A solar-type system starts from an initial molecular core that acquires organic complexity as it evolves. The so-called prestellar cores that can be studied are rare, which has hampered our understanding of how organic chemistry sets in and grows.
Aims: We selected the best prestellar core targets from the cold core catalogue (based …