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HAT-P-58b-HAT-P-64b: Seven Planets Transiting Bright Stars
Torres, Guillermo; Sato, B.; Hébrard, G. +31 more
We report the discovery and characterization of seven transiting exoplanets from the HATNet survey. The planets, which are hot Jupiters and Saturns transiting bright Sun-like stars, include: HAT-P-58b (with mass Mp = 0.37 MJ, radius Rp = 1.33 RJ, and orbital period P = 4.0138 days), HAT-P-59b (Mp
Asteroid Observations from the Transiting Exoplanet Survey Satellite: Detection Processing Pipeline and Results from Primary Mission Data
Pál, András; Vaillancourt, John E.; Kotson, Michael C. +7 more
The Transiting Exoplanet Survey Satellite (TESS) is a NASA Explorer-class mission designed for finding exoplanets around nearby stars. TESS image data can also serve as a valuable resource for asteroid and comet detection, including near-Earth objects (NEOs). In order to exploit the TESS image data for moving object detection and potential object …
Concurrent empirical magnetic reconstruction of storm and substorm spatial scales using data mining and virtual spacecraft
Stephens, Grant K.; Sitnov, Mikhail I.
Data-mining (DM) has ushered in a new era of empirical magnetic reconstructions of the 4 magnetosphere via application of the k-nearest neighbors (kNN) method. In this approach, 5 the combined magnetosphere storm-substorm state is characterized by the Sym-H and AL IMF 6 indices, their time derivatives, and the solar wind electric field vBz . Howev…
Toward a More Complex Understanding of Natal Super Star Clusters with Multiwavelength Observations
Johnson, Kelsey E.; Indebetouw, Remy; Brogan, Crystal L. +3 more
Henize 2-10 (He 2-10) is a nearby (D = 9 Mpc) starbursting blue compact dwarf galaxy that boasts a high star formation rate and a low-luminosity active galactic nucleus. He 2-10 is also one of the first galaxies in which embedded super star clusters (SSCs) were discovered. SSCs are massive, compact star clusters that will impact their host galaxie…
ALMA Lensing Cluster Survey: A spectral stacking analysis of [C II] in lensed z ∼ 6 galaxies
Richard, Johan; Fujimoto, Seiji; Kohno, Kotaro +14 more
Context. The properties of galaxies at redshift z > 6 hold the key to our understanding of the early stages of galaxy evolution and can potentially identify the sources of the ultraviolet radiation that give rise to the epoch of reionisation. The far-infrared cooling line of [C II] at 158 µm is known to be bright and correlate with the st…
Characterization of M dwarfs using optical mid-resolution spectra for exploration of small exoplanets
Wisniewski, John; Hirano, Teruyuki; Sato, Bun'ei +4 more
We present the optical spectra of 338 nearby M dwarfs, and compute their spectral types, effective temperatures (Teff), and radii. Our spectra were obtained using several optical spectrometers with spectral resolutions that range from 1200 to 10000. As many as 97% of the observed M-type dwarfs have a spectral type of M3-M6, with a typic…
Vertical Distribution of Aerosols and Hazes Over Jupiter's Great Red Spot and Its Surroundings in 2016 From HST/WFC3 Imaging
Irwin, Patrick G. J.; Sánchez-Lavega, Agustín.; Anguiano-Arteaga, Asier +2 more
In this work, we have analyzed images provided by the Hubble Space Telescope's Wide Field Camera 3 (HST/WFC3) in December 2016, with a spectral coverage from the ultraviolet to the near infrared. We have obtained the spectral reflectivity of the GRS and its surroundings, with particular emphasis on selected, dynamically interesting regions. A spec…
UV Fluorescence Traces Gas and Lyα Evolution in Protoplanetary Disks
Herczeg, Gregory J.; Brown, Alexander; France, Kevin +5 more
Ultraviolet spectra of protoplanetary disks trace distributions of warm gas at radii where rocky planets form. We combine Hubble Space Telescope Cosmic Origins Spectrograph observations of H2 and CO emission from 12 classical T Tauri stars to more extensively map inner disk surface layers, where gas temperature distributions allow radia…
Detection of nearly periodic spin period reversals in Vela X-1 on long time-scales: inkling of solar-like cycle in the donor star?
Roy, Jayashree; Agrawal, P. C.; Choudhury, Manojendu +1 more
We explore the long-term evolution of the spin period of the high-mass X-ray binary pulsar Vela X-1 over a period of 46 yr. Our analysis indicates nearly periodic variations in the spin period of the pulsar on time-scales of about 5.9 yr. There is suggestion of an overall spin-down behaviour of the pulsar though it is noticed that the source appea…
Transient Formation of Loops in the Core of an Active Region
Tripathi, Durgesh
We study the formation of transient loops in the core of the AR 11890. For this purpose, we have used the observations recorded by the Atmospheric Imaging Assembly (AIA) and the Interface Region Imaging Spectrograph (IRIS). For photospheric field configuration, we have used the line-of-sight (LOS) magnetograms obtained from the Helioseismic and Ma…