Search Publications
The Dust-selected Molecular Clouds in the Northeast Region of the Small Magellanic Cloud
Kohno, Kotaro; Bot, Caroline; Yun, Min S. +19 more
We present a high-sensitivity (1σ < 1.6 mJy beam-1) continuum observation in a 343 arcmin2 area of the northeast region of the Small Magellanic Cloud at a wavelength of 1.1 mm, conducted using the AzTEC instrument on the ASTE telescope. In the observed region, we identified 20 objects by contouring 10σ emission. Through sp…
Recurrent Outbursts Revealed in 3XMM J031820.8-663034
Weng, Shan-Shan; Zhao, Hai-Hui; Wang, Jun-Xian
3XMM J031820.8-663034, first detected by ROSAT in NGC 1313, is one of a few known transient ultraluminous X-ray sources (ULXs). In this paper, we present decades of X-ray data of this source from ROSAT, XMM-Newton, Chandra, and the Neil Gehrels Swift Observatory. We find that its X-ray emission experienced four outbursts since 1992, with a typical…
A-type Stellar Abundances: A Corollary to Herschel Observations of Debris Disks
Matthews, Brenda; Draper, Zachary H.; Kennedy, Grant +3 more
In order to assess the relationship between metallicity and exoplanetary systems, we compare the abundances of AF-type main-sequence stars with debris disk properties assessed using Herschel observations of an unbiased survey of nearby stars. Hot stars are not as commonly observed, given their unique constraints in data reduction, lack of metal li…
Calvera: A Low-mass Strangeon Star Torqued by Debris Disk?
Ge, Mingyu; Xu, Renxin; Li, Yunyang +3 more
Calvera is a unique 59 {ms} isolated pulsar, because it cannot be detected by radio, optical, and gamma-rays; however, it is detectable through the purely thermal emission in soft X-rays. It is suggested that Calvera could be an ordinary middle-aged pulsar with significant magnetospheric activity at a large distance. Alternatively, it is proposed …
Kinematic Identification of Young Nearby Moving Groups from a Sample of Chromospherically Active Stars in the RAVE Catalog
Suárez, Genaro; Aguilar, Luis; Downes, Juan José +2 more
The purpose of this study is the identification of young (1 < age < 100 Myr), nearby (d ≤ 100 pc) moving groups (YNMGs) through their kinematic signature. YNMGs could be the result of the recent dispersal of young embedded clusters, such that they still represent kinematically cold groups, carrying the residual motion of their parental cloud…
Orbital Characterization of GJ1108A System, and Comparison of Dynamical Mass with Model-derived Mass for Resolved Binaries
Kuzuhara, M.; Tamura, M.; Ishii, M. +55 more
We report an orbital characterization of GJ1108Aab that is a low-mass binary system in the pre-main-sequence phase. Via the combination of astrometry using adaptive optics and radial velocity measurements, an eccentric orbital solution of e = 0.63 is obtained, which might be induced by the Kozai-Lidov mechanism with a widely separated GJ1108B syst…
In-situ Star Formation in the Outskirts of the Large Magellanic Cloud: Gaia DR2 Confirmation
Casetti-Dinescu, Dana I.; Girard, Terrence M.; Korchagin, Vladimir I. +5 more
We explore the Gaia data release 2 (DR2) proper motions of six young, main-sequence stars, members of the Large Magellanic Cloud (LMC) reported by Moni Bidin et al. These stars are located in the outskirts of the disk, between 7° and 13° from the LMC’s center where there is very low H I content. Gaia DR2 proper motions confirm that four stars form…
The Sun's Seismic Radius as Measured from the Fundamental Modes of Oscillations and Its Implications for the TSI Variations
Hill, F.; Tripathy, S. C.; Jain, Kiran
In this Letter we explore the relationship between the solar seismic radius and total solar irradiance (TSI) during the last two solar cycles using the uninterrupted data from space-borne instruments on board the Solar and Heliospheric Observatory (SoHO) and the Solar Dynamics Observatory (SDO). The seismic radius is calculated from the fundamenta…
Erratum: “A Suzaku View of Accretion-powered X-Ray Pulsar GX 1+4” (2017, ApJ, 838, 30)
Hoshino, Akio; Naik, Sachindra; Kitamoto, Shunji +3 more
The Complexities of Interstellar Dust and the Implications for the Small-scale Structure in the Cosmic Microwave Background
Verschuur, G. L.; Schmelz, J. T.
A detailed comparison of the full range of PLANCK and Wilkinson Microwave Anisotropy Probe data for small (2° × 2°) areas of sky and the Cosmic Microwave Background Internal Linear Combination (ILC) maps reveals that the structure of foreground dust may be more complex than previously thought. If 857 and 353 GHz emission is dominated by galactic d…