Search Publications
A deep 1.4 GHz survey of the J1030 equatorial field: A new window on radio source populations across cosmic time
Prandoni, I.; Massardi, M.; Vignali, C. +12 more
We present deep L-Band observations of the equatorial field centered on the z = 6.3 Sloan Digital Sky Survey (SDSS) quasar (QSO). This field is rich of multiwavelength photometry and spectroscopy data, making it an ideal laboratory for galaxy evolution studies. Our observations reach a 1σ sensitivity of ~2.5 µJy at the center of the field. We extr…
Ultracool dwarfs identified using spectra in LAMOST DR7
Luo, A. -Li; Li, Yin-Bi; Zhang, Shuo +7 more
In this work, we identify 734 ultracool dwarfs with a spectral type of M6 or later, including one L0. Of this sample, 625 were studied spectroscopically for the first time. All of these ultracool dwarfs are within 360 pc, with a Gaia G magnitude brighter than ∼19.2 mag. By studying the spectra and checking their stellar parameters (Teff…
Multiwavelength observations of Swift J0243.6+6124 from 2017 to 2022
Liu, Wei; Wang, Xiaofeng; Sai, Hanna +8 more
Context.Swift J0243.6+6124 is a high-mass X-ray binary that went into a giant X-ray outburst in 2017. During this event, the X-ray luminosity reached the highest value ever measured in a galactic Be/X-ray binary.
Aims: Our aim is to study the long-term variability of Swift J0243.6+6124 after the 2017 major X-ray outburst.
Methods: We hav…
The ionised and molecular mass of post-common-envelope planetary nebulae. The missing mass problem
Alcolea, J.; Santander-García, M.; Bujarrabal, V. +2 more
Context. Most planetary nebulae (PNe) show beautiful, axisymmetric morphologies despite their progenitor stars being essentially spherical. Close binarity is widely invoked to help eject an axisymmetric nebula, after a brief phase of engulfment of the secondary within the envelope of the asymptotic giant branch (AGB) star, known as the common enve…
Searching for the connection between ionizing-photon escape and the surface density of star formation at z 3
Steidel, Charles C.; Reddy, Naveen A.; Shapley, Alice +2 more
The connection between the escape fraction of ionizing photons (fesc) and star formation rate surface density (ΣSFR) is a key input for reionization models, but remains untested at high redshift. We analyse 35 z ~ 3 galaxies from the Keck Lyman Continuum Survey (KLCS) covered by deep, rest far-UV spectra of the Lyman continuu…
The Relative Orientation between Local Magnetic Field and Galactic Plane in Low Latitude Dark Clouds
Wolf, S.; Pandey, J. C.; Choudhury, Gulafsha B. +4 more
In this work, we study the magnetic field morphology of selected star-forming clouds spread over the galactic latitude (b) range -10° to 10°. The polarimetric observations of clouds CB24, CB27 and CB188 are conducted to study the magnetic field geometry of those clouds using the 104 cm Sampurnanand Telescope (ST) located at ARIES, Manora Peak, Nai…
Cloud-scale radio surveys of star formation and feedback in Triangulum Galaxy M 33: VLA observations
Menten, K. M.; Braine, J.; Beck, R. +11 more
Studying the interplay between massive star formation and the interstellar medium (ISM) is paramount to understand the evolution of galaxies. Radio continuum (RC) emission serves as an extinction-free tracer of both massive star formation and the energetic components of the ISM. We present a multiband RC survey of the Local Group galaxy M 33 down …
A Study of the NGC 1193 and NGC 1798 Open Clusters Using CCD UBV Photometric and Gaia EDR3 Data
Bilir, S.; Yontan, T.; Çakmak, T. +8 more
We present photometric, astrometric, and kinematic studies of the old open star clusters NGC 1193 and NGC 1798. Both of the clusters are investigated by combining data sets from Gaia Early Data Release 3 (EDR3) and CCD UBV observational data. E(B − V) color excesses are derived for NGC 1193 as 0.150 ± 0.037 and for NGC 1798 as 0.505 ± 0.100 mag th…
Thermal emission from bow shocks. II. 3D magnetohydrodynamic models of ζ Ophiuchi
Kavanagh, Patrick; Green, Samuel; Mackey, Jonathan +3 more
The nearby, massive, runaway star ζ Ophiuchi has a large bow shock detected in optical and infrared light and, uniquely among runaway O stars, diffuse X-ray emission detected from the shocked stellar wind. Here we make the first detailed computational investigation of the bow shock of ζ Ophiuchi, to test whether a simple model of the bow shock can…
Water vapor saturation and ice cloud occurrence in the atmosphere of Mars
Vandaele, Ann Carine; Aoki, Shohei; Kleinböhl, Armin +3 more
We investigate water vapor saturation in the martian atmosphere in the presence or proximity of water ice clouds. We evaluate mixing ratio profiles of ambient water vapor derived from measurements by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) and the Nadir and Occultation for MArs Discovery (NOMAD) instrument in comparison wi…