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A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb
Soszyński, I.; Udalski, A.; Szymański, M. K. +50 more
We present the discovery of a planet on a very wide orbit in the microlensing event OGLE-2012-BLG-0838. The signal of the planet is well separated from the main peak of the event and the planet-star projected separation is found to be twice the Einstein ring radius, which corresponds to a projected separation of ≈4 au. Similar planets around low-m…
HCN 3-2 survey towards a sample of local galaxies
Fang, Min; Li, Shanghuo; Wang, Junzhi +4 more
We present observations of HCN 3-2 emissions towards 37 local galaxies using the 10 m Submillimeter Telescope. HCN 3-2 emission is detected in 23 galaxies. The correlation of infrared luminosity (LIR) and the luminosity of HCN 3-2 line emission measured in our sample is fitted with a slope of 1.11 and correlation coefficient of 0.91, wh…
Globular Clusters Lost by the Sagittarius Dwarf Spheroidal Galaxy
Sharina, M. E.; Arakelyan, N. R.; Pilipenko, S. V.
—In this work a search was carried out for globular clusters belonging to the Sagittarius (Sgr) tidal stream using the analysis of spatial positions, radial velocities relative to the Galactic Standard of Rest (VGSR), proper motions and ratio of "age–metallicity" ([Fe/H]) for globular clusters and for stars in the tidal stream. As a res…
What Determines Solar Flares Producing Interplanetary Type III Radio Bursts?
Liu, Y.; Cheng, X.; Ding, M. D. +4 more
Energetic electrons accelerated by solar flares often give rise to type III radio bursts at a broad wave band and even interplanetary type III bursts (IT3) if the wavelength extends to a decameter-kilometer. In this Letter, we investigate the probability of the flares that produce IT3, based on the sample of 2272 flares above M-class observed from…
Glacial landscape and paleoglaciation in Terra Sabaea: Evidence for a 3.6 Ga polythermal plateau ice cap
Costard, François; Bouley, Sylvain; Bouquety, Axel +2 more
In a previous study, we demonstrated with a comparative morphometrical analysis the first morphometric evidence of a glacial landscape composed of glacial cirques and glacial valleys in the south of Terra Sabaea at an elevation > 1000 m in two impact craters and one mountain. The purpose of this study is to use the same method to seek other geo…
Magnetic Connectivity between the Light Bridge and Penumbra in a Sunspot
Feng, Song; Nakariakov, Valery M.; Yuan, Ding +2 more
A light bridge is a prominent structure commonly observed within a sunspot. Its presence usually triggers a wealth of dynamics in a sunspot and has a lasting impact on sunspot evolution. However, the fundamental structure of light bridges is still not well understood. In this study, we used the high-resolution spectropolarimetry data obtained by t…
Magnetic Inflation and Stellar Mass. V. Intensification and Saturation of M-dwarf Absorption Lines with Rossby Number
Muirhead, Philip S.; Mann, Andrew W.; Newton, Elisabeth R. +2 more
In young Sun-like stars and field M-dwarf stars, chromospheric and coronal magnetic activity indicators such as Hα, X-ray, and radio emission are known to saturate with low Rossby number (Ro ≲ 0.1), defined as the ratio of rotation period to convective turnover time. The mechanism for the saturation is unclear. In this paper, we use photospheric T…
A Multiwavelength Study of PSR J1119-6127 after 2016 Outburst
Takata, J.; Wang, H. -H.; Dai, S. +4 more
The high magnetic field pulsar PSR J1119-6127, detected from radio to high-energy wavelengths, underwent a magnetar-like outburst beginning on 2016 July 27. In this paper, we study the postoutburst multiwavelength properties of this pulsar from the radio to GeV bands and discuss its similarity with the outburst of the magnetar XTE J1810-197. In ph…
Evidence for non-smooth quenching in massive galaxies at z ∼ 1
Whitaker, Katherine; Guo, Yicheng; Nayyeri, Hooshang +3 more
We investigate a large sample of massive galaxies at z ∼ 1 with combined Hubble Space Telescope (HST) broad-band and grism observations to constrain the star formation histories (SFHs) of these systems as they transition from a star-forming state to quiescence. Among our sample of massive (M_*> 10^{10} M_{⊙}) galaxies at 0.7 < z < 1.2, du…
TESS photometry of helium-rich hot subdwarfs: r modes in BD+37°442 and BD+37°1977
Jeffery, C. Simon
Transiting Exoplanet Survey Satellite photometry of the extremely helium-rich hot subdwarfs BD+37°442 and BD+37°1977 demonstrates multiperiodic low-amplitude variability with principal periods of 0.56 and 1.14 d, respectively, and with both first and second harmonics present. The light curves are not perfectly regular, implying additional periodic…