Search Publications
Resolved galactic superwinds reconstructed around their host galaxies at z > 3
Broadhurst, Tom; Chen, Hsiao-Wen; Rauch, Michael +2 more
This paper presents a detailed analysis of two giant Lyman-alpha (Ly α) arcs detected near galaxies at z = 3.038 and z = 3.754 lensed by the massive cluster MACS 1206-0847 (z = 0.44). The Ly α nebulae revealed in deep MUSE observations exhibit a double-peaked profile with a dominant red peak, indicating expansion/outflowing motions. One of the arc…
Standard stellar luminosities: what are typical and limiting accuracies in the era after Gaia?
Bakış, V.; Eker, Z.; Soydugan, F. +1 more
Methods of obtaining stellar luminosities (L) have been revised and a new concept, standard stellar luminosity, has been defined. In this paper, we study three methods: (i) a direct method from radii and effective temperatures; (ii) a method using a mass-luminosity relation (MLR); and (iii) a method requiring a bolometric correction. If the unique…
The post-main-sequence fate of the HR 8799 planetary system
Hinkley, Sasha; Veras, Dimitri
The noteworthy four-planet HR 8799 system teeters on the brink of gravitational instability and contains an A-type host star that is characteristic of the progenitors of the majority of known white dwarf planetary system hosts. Goździewski & Migaszewski have demonstrated that the system can retain all four planets for at least 1 Gyr along the …
An observational testbed for cosmological zoom-in simulations: constraining stellar migration in the solar cylinder using asteroseismology
Grand, Robert J. J.; Stokholm, Amalie; Verma, Kuldeep +1 more
Large-scale stellar surveys coupled with recent developments in magneto-hydrodynamical simulations of the formation of Milky Way-mass galaxies provide an unparalleled opportunity to unveil the physical processes driving the evolution of the Galaxy. We developed a framework to compare a variety of parameters with their corresponding predictions fro…
The Gaia view of the Cepheus flare
Ábrahám, Péter; Kun, Mária; Szilágyi, Máté
We present a new census of candidate pre-main-sequence stars in the Cepheus flare star-forming region, based on Gaia EDR3 parallaxes, proper motions, and colour-magnitude diagrams. We identified new candidate members of the previously known young stellar groups associated with NGC 7023, L1177, L1217/L1219, L1228, L1235, and L1251. We studied the 3…
PSR B0656+14: the unified outlook from the infrared to X-rays
Geier, S.; Mennickent, R. E.; Cabrera-Lavers, A. +4 more
We report detection of PSR B0656+14 with the Gran Telescopio Canarias in narrow optical F657, F754, F802, and F902 and near-infrared JHKs bands. The pulsar detection in the Ks band extends its spectrum to 2.2 $\mu$m and confirms its flux increase towards the infrared. We also present a thorough analysis of the optical spectru…
Central kinematics of the Galactic globular cluster M80
Weilbacher, Peter M.; Kamann, Sebastian; Dreizler, Stefan +7 more
We use spectra observed with the integral-field spectrograph Multi Unit Spectroscopic Explorer (MUSE) to reveal the central kinematics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Using observations obtained with the recently commissioned narrow-field mode of MUSE, we are able to analyse 932 stars in the central 7.5 arcsec by 7.5 a…
Detection of nearly periodic spin period reversals in Vela X-1 on long time-scales: inkling of solar-like cycle in the donor star?
Roy, Jayashree; Agrawal, P. C.; Choudhury, Manojendu +1 more
We explore the long-term evolution of the spin period of the high-mass X-ray binary pulsar Vela X-1 over a period of 46 yr. Our analysis indicates nearly periodic variations in the spin period of the pulsar on time-scales of about 5.9 yr. There is suggestion of an overall spin-down behaviour of the pulsar though it is noticed that the source appea…
The GALANTE photometric survey of the northern Galactic plane: project description and pipeline
García-Lario, P.; Maíz Apellániz, J.; Alfaro, E. J. +9 more
The GALANTE optical photometric survey is observing the northern Galactic plane and some adjacent regions using seven narrow- and intermediate-filters, covering a total of 1618 deg2. The survey has been designed with multiple exposure times and at least two different air masses per field to maximize its photometric dynamic range, compar…
Unraveling the inner substructure of new candidate hub-filament system in the H II region G25.4NW
Dewangan, L. K.
We present multiscale and multiwavelength data of the Galactic H II region G25.4-0.14 (hereafter G25.4NW, distance ~5.7 kpc). The SHARC-II 350-µm continuum map displays a hub-filament configuration containing five parsec-scale filaments and a central compact hub. Through the 5-GHz radio continuum map, four ionized clumps (i.e. Ia-Id) are ide…