Search Publications
The Inner Disk and Accretion Flow of the Close Binary DQ Tau
Gutermuth, Robert; Muzerolle, James; Flaherty, Kevin +2 more
We present multiepoch optical and near-infrared (NIR) photometry and spectroscopy of the spectroscopic binary T Tauri star DQ Tau. The photometric monitoring, obtained using SMARTS ANDICAM, recovers the previously seen correlation between optical flux and the 15.8 day binary orbital period, with blue flux peaks occurring close to most observed per…
Single-lined Spectroscopic Binary Star Candidates from a Combination of the RAVE and Gaia DR2 Surveys
Grebel, Eva K.; Steinmetz, Matthias; Bland-Hawthorn, Joss +11 more
The combination of the final version of the Radial Velocity Experiment (RAVE) spectroscopic survey data release 6 with radial velocities (RVs) and astrometry from Gaia DR2 allows us to identify and create a catalog of single-lined binary star candidates (SB1), their inferred orbital parameters, and to inspect possible double-lined binary stars (SB…
Using Gaia DR2 to detect extratidal structures around the Galactic globular cluster NGC 362
Carballo-Bello, Julio A.
We explore the possibility of searching for extratidal features around the Galactic globular cluster NGC 362 using the Gaia DR2 (second data release) together with a modified version of a classical statistical decontamination algorithm. Our results suggest that an important stellar component is associated with this globular cluster, which is perfe…
Progenitors and explosion properties of supernova remnants hosting central compact objects: I. RCW 103 associated with the peculiar source 1E 161348-5055
Fryer, C. L.; Safi-Harb, S.; Braun, C.
We present a Chandra and XMM-Newton imaging and spectroscopic study of the supernova remnant (SNR) RCW 103 (G332.4-00.4) containing the central compact object 1E 161348-5055. The high-resolution Chandra X-ray images reveal enhanced emission in the south-eastern and north-western regions. Equivalent width line images of Fe L, Mg, Si, and S using XM…
The OSIRIS Lens-amplified Survey (OLAS). I. Dynamical Effects of Stellar Feedback in Low-mass Galaxies at z ∼ 2
Treu, Tommaso; Bradač, Maruša; Wang, Xin +6 more
We introduce the OSIRIS Lens-Amplified Survey (OLAS), a kinematic survey of gravitationally lensed galaxies at cosmic noon taken with Keck adaptive optics. In this paper, we present spatially resolved spectroscopy and nebular emission kinematic maps for 17 star-forming galaxies with stellar masses 8 < log(M */M ⊙) < 9.8…
Stellar population astrophysics (SPA) with the TNG. Characterization of the young open cluster ASCC 123
Vallenari, A.; Sordo, R.; Bragaglia, A. +10 more
Star clusters are crucial to understanding stellar and Galactic evolution. ASCC 123 is a little-studied, nearby, and very sparse open cluster. We performed the first high-resolution spectroscopic study of this cluster in the framework of the Stellar Population Astrophysics (SPA) project with GIARPS at the TNG. We observed 17 stars, 5 of which turn…
Compton-thick AGNs in the NuSTAR Era. V. Joint NuSTAR and XMM-Newton Spectral Analysis of Three “Soft-gamma” Candidate CT-AGNs in the Swift/BAT 100-month Catalog
Comastri, A.; Ajello, M.; La Parola, V. +3 more
We present the joint NuSTAR and XMM-Newton spectral analysis in the 0.6-70 keV band of three candidate Compton-thick (CT-) active galactic nuclei (AGNs) selected in the 100-month Swift-BAT catalog. These objects were previously classified as CT-AGNs based on low-quality Swift-X-ray Telescope (XRT) and Swift-Burst Alert Telescope (BAT) data, and ha…
The Warm Gaseous Disk and the Anisotropic Circumgalactic Medium of the Milky Way
Bregman, Joel N.; Qu, Zhijie
Warm ({log}T≈ 5) gas is an important gaseous component in the galaxy baryonic cycle, which is important for understanding both gas accretion and galactic feedback processes. We built a two-dimensional disk-circumgalactic medium (CGM) model to study the warm gas distribution of the Milky Way (MW) using the absorption-line surveys of Si IV and O VI.…
Photometric Determination of the Mass Accretion Rates of Pre-main-sequence Stars. VI. The Case of LH 95 in the Large Magellanic Cloud
Panagia, Nino; Beccari, Giacomo; De Marchi, Guido +1 more
We report on the accretion properties of low-mass stars in the LH 95 association within the Large Magellanic Cloud. Using noncontemporaneous wideband optical and narrowband Hα photometry obtained with the Hubble Space Telescope, we identify 245 low-mass pre-main-sequence (PMS) candidates showing Hα excess emission above the 4σ level. We derive the…
Horizontal branch morphology: A new photometric parametrization
Salaris, M.; Fontana, A.; Castellani, M. +8 more
Context. Theory and observations indicate that the distribution of stars along the horizontal branch of Galactic globular clusters mainly depends on the metal content. However, the existence of globular clusters with similar metal content and absolute age but different horizontal branch morphologies, suggests the presence of another parameter affe…