Search Publications
The Orbit of the Companion to HD 100453A: Binary-driven Spiral Arms in a Protoplanetary Disk
Dong, Ruobing; Wagner, Kevin; Apai, Dániel +9 more
HD 100453AB is a 10 ± 2 Myr old binary whose protoplanetary disk was recently revealed to host a global two-armed spiral structure. Given the relatively small projected separation of the binary (1.″05, or ∼108 au), gravitational perturbations by the binary seemed to be a likely driving force behind the formation of the spiral arms. However, the or…
Lyman-continuum leakage as dominant source of diffuse ionized gas in the Antennae galaxy
Bacon, Roland; Maseda, Michael V.; Richard, Johan +14 more
The Antennae galaxy (NGC 4038/39) is the closest major interacting galaxy system and is therefore often studied as a merger prototype. We present the first comprehensive integral field spectroscopic dataset of this system, observed with the MUSE instrument at the ESO VLT. We cover the two regions in this system which exhibit recent star formation:…
Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a
Sabo, R.; Ness, J. -U.; Henze, M. +70 more
Since its discovery in 2008, the Andromeda galaxy nova M31N 2008-12a has been observed in eruption every single year. This unprecedented frequency indicates an extreme object, with a massive white dwarf and a high accretion rate, which is the most promising candidate for the single-degenerate progenitor of a Type Ia supernova known to date. The pr…
Phlegethon, a Nearby 75°-long Retrograde Stellar Stream
Malhan, Khyati; Ibata, Rodrigo A.; Martin, Nicolas F. +1 more
We report the discovery of a 75°-long stellar stream in the Gaia DR2 catalog, found using the new STREAMFINDER algorithm. The structure is probably the remnant of a now fully disrupted globular cluster, which lies ≈3.8 kpc away from the Sun in the direction of the Galactic bulge and possesses highly retrograde motion. We find that the system orbit…
New and Known Moving Groups and Clusters Identified in a Gaia Comoving Catalog
Faherty, Jacqueline K.; Gagné, Jonathan; Bochanski, John J. +5 more
We present a reorganization of the Oh et al. wide, comoving catalog of 4555 groups of stars (10,606 individual objects) identified in the Tycho Gaia Astrometric Survey (TGAS) into new and known coevolving groups of stars in the Milky Way. We use the BANYAN Σ kinematic analysis tool to identify 1015 individual stars in the Oh et al. catalog that yi…
(3200) Phaethon: Bulk density from Yarkovsky drift detection
Kučáková, H.; Farnocchia, D.; Vokrouhlický, D. +8 more
Context. The recent close approach of the near-Earth asteroid (3200) Phaethon offered a rare opportunity to obtain high-quality observational data of various types.
Aims: We used the newly obtained optical light curves to improve the spin and shape model of Phaethon and to determine its surface physical properties derived by thermophysical mo…
A large sample of shear-selected clusters from the Hyper Suprime-Cam Subaru Strategic Program S16A Wide field mass maps
Miyatake, Hironao; Oguri, Masamune; Umetsu, Keiichi +13 more
We present the result of searching for clusters of galaxies based on weak gravitational lensing analysis of the ∼160 deg2 area surveyed by Hyper Suprime-Cam (HSC) as a Subaru Strategic Program. HSC is a new prime focus optical imager with a 1.5°-diameter field of view on the 8.2 m Subaru telescope. The superb median seeing on the HSC i-…
Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas
Ivison, R. J.; Smail, Ian; Riechers, D. A. +15 more
The most intensively star-forming galaxies are extremely luminous at far-infrared (FIR) wavelengths, highly obscured at optical and ultraviolet wavelengths, and lie at z ≥ 1-3. We present a programme of FIR spectroscopic observations with the SPIRE FTS, as well as photometric observations with PACS, both on board Herschel, towards a sample of 45 g…
Galactic Planetary Nebulae as Probes of Radial Metallicity Gradients and Other Abundance Patterns
Haywood, Misha; Stanghellini, Letizia
We use planetary nebulae (PNe) as probes to determine the Galactic radial oxygen gradients and other abundance patterns. We select data homogeneously from recent data sets, including PNe at large Galactocentric distances. The radial oxygen gradient calculated for the general PN population, which probes the region from the Galactic center out to ∼2…
The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations
Ivison, R. J.; Omont, A.; Clements, D. L. +20 more
We present the Herschel Bright Sources (HerBS) sample, a sample of bright, high-redshift Herschel sources detected in the 616.4 deg2 Herschel Astrophysical Terahertz Large Area Survey. The HerBS sample contains 209 galaxies, selected with a 500 µm flux density greater than 80 mJy and an estimated redshift greater than 2. The sampl…