Search Publications
Analysis of XMM-Newton Observations of Supernova Remnant W49B and Clues to the Progenitor
Frank, Kari A.; Burrows, David N.; Dwarkadas, Vikram V. +1 more
W49B is a supernova remnant (SNR) discovered over 60 yr ago in early radio surveys. It has since been observed over the entire wavelength range, with the X-ray morphology resembling a centrally filled SNR. The nature of its progenitor star is still debated. Applying Smoothed Particle Inference techniques to analyze the X-Ray emission from W49B, we…
Sustained formation of progenitor globular clusters in a giant elliptical galaxy
Broadhurst, Tom; Ohyama, Youichi; Medezinski, Elinor +2 more
Globular clusters (GCs) are thought to be ancient relics from the early formative phase of galaxies, although their physical origin remains uncertain1,2. GCs are most numerous around massive elliptical galaxies, where they can exhibit a broad colour dispersion, suggesting a wide metallicity spread3. Here, we show that many th…
Differential rotation of the solar corona: A new data-adaptive multiwavelength approach
Giordano, S.; Mancuso, S.; Telloni, D. +1 more
Context. The characterization of the differential rotation of the extended corona is still lacking conclusive results about the actual rotation rate profiles, and it is also expected to vary along the solar cycle. While some studies supported the quasi-rigidity of coronal rotation, others have found evidence of differential rotation to occur.
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Internal kinematics of giant H II regions in M101 with the Keck Cosmic Web Imager
Bresolin, Fabio; Ho, I. -Ting; Rizzi, Luca +6 more
We study the kinematics of the giant H II regions NGC 5455 and NGC 5471 located in the galaxy M101, using integral field observations that include the H β and [O III] $\, \lambda$ 5007 emission lines, obtained with the Keck Cosmic Web Imager. We analyse the line profiles using both single and multiple Gaussian curves, gathering evidence for the pr…
TOI 564 b and TOI 905 b: Grazing and Fully Transiting Hot Jupiters Discovered by TESS
Trifonov, Trifon; Batalha, Natalie M.; Latham, David W. +54 more
We report the discovery and confirmation of two new hot Jupiters discovered by the Transiting Exoplanet Survey Satellite (TESS): TOI 564 b and TOI 905 b. The transits of these two planets were initially observed by TESS with orbital periods of 1.651 and 3.739 days, respectively. We conducted follow-up observations of each system from the ground, i…
Skymaps of observables of three-dimensional magnetohydrodynamic astrosphere models
Weis, K.; Bomans, D. J.; Fichtner, H. +3 more
Context. Three-dimensional models of astrospheres have recently become of interest. However, comparisons between these models and observations are non-trivial because of the two-dimensional nature of observations.
Aims: By projecting selected physical values of three-dimensional models of astrospheres onto the surface of a sphere that is cent…
Five Stellar Populations in M22 (NGC 6656)
Lee, Jae-Woo
We present the Ca-CN-CH photometry of the metal-complex globular cluster (GC) M22 (NGC 6656). Our photometry clearly shows the discrete double CN-CH anticorrelations in M22 red giant branch (RGB) stars, due to the difference in the mean metallicity. The populational number ratio between the two main groups is n(G1):n(G2) = 63:37(±3), with the G1 b…
The evolutionary status of protostellar clumps hosting class II methanol masers
Avison, A.; Elia, D.; Schisano, E. +9 more
The Methanol MultiBeam survey (MMB) provides the most complete sample of Galactic massive young stellar objects (MYSOs) hosting 6.7 GHz class II methanol masers. We characterize the properties of these maser sources using dust emission detected by the Herschel Infrared Galactic Plane Survey (Hi-GAL) to assess their evolutionary state. Associating …
Mon-735: a new low-mass pre-main-sequence eclipsing binary in NGC 2264
Aigrain, Suzanne; Gillen, Edward; Cody, Ann Marie +3 more
We present Mon-735, a detached double-lined eclipsing binary (EB) member of the ∼3 Myr old NGC 2264 star-forming region, detected by Spitzer. We simultaneously model the Spitzer light curves, follow-up Keck/HIRES radial velocities, and the system's spectral energy distribution to determine self-consistent masses, radii, and effective temperatures …
The GAPS programme at TNG. XXIII. HD 164922 d: close-in super-Earth discovered with HARPS-N in a system with a long-period Saturn mass companion
Scandariato, G.; Pagano, I.; Marzari, F. +41 more
Context. Observations of exoplanetary systems demonstrate that a wide variety of planetary architectures are possible. Determining the rate of occurrence of Solar System analogues - with inner terrestrial planets and outer gas giants - remains an open question.
Aims: Within the framework of the Global Architecture of Planetary Systems (GAPS) …