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The GALAH survey and symbiotic stars - I. Discovery and follow-up of 33 candidate accreting-only systems
Freeman, K. C.; Masetti, N.; Munari, U. +14 more
We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600 255 stars so far observed by the GALactic Archaeology with HERMES (GALAH) high-resolution spectroscopic survey of the Southern hemisphere, more than doubling the number of those previously known. GALAH aims to high latitudes…
SMARPs and SHARPs: Two Solar Cycles of Active Region Data
Sun, Xudong; Bobra, Monica G.; Wright, Paul J. +1 more
We present a new data product, called Space-Weather MDI Active Region Patches (SMARPs), derived from maps of the solar surface magnetic field taken by the Michelson Doppler Imager on board the Solar and Heliospheric Observatory. Together with the Space-Weather HMI Active Region Patches (SHARPs), derived from similar maps taken by the Helioseismic …
BG Ind: the nearest doubly eclipsing, compact hierarchical quadruple system
Vanderburg, A.; Maxted, P. F. L.; Blackford, M. G. +9 more
BG Ind is a well-studied, bright, nearby binary consisting of a pair of F stars in a 1.46-d orbit. We have discovered in the TESS light curve for TIC 229804573 (aka BG Ind), a second eclipsing binary in the system with a 0.53-d period. Our subsequent analyses of the recent TESS and archival ground-based photometric and radial velocity (RV) data re…
On a Possible Solution to the Tidal Realignment Problem for Hot Jupiters
Winn, Joshua N.; Penev, Kaloyan; Anderson, Kassandra R.
Hot stars with hot Jupiters have a wide range of obliquities, while cool stars with hot Jupiters tend to have low obliquities. An enticing explanation for this pattern is tidal realignment of the cool host stars, although this explanation assumes that obliquity damping occurs faster than orbital decay, an assumption that needs further exploration.…
Detection of a Multiphase Ultrafast Wind in the Narrow-line Seyfert 1 Galaxy Mrk 1044
Santos-Lleó, M.; Peterson, B. M.; Nicastro, F. +6 more
We present a detailed analysis of XMM-Newton X-ray spectra of the Narrow-Line Seyfert 1 galaxy Mrk 1044. We find robust evidence for a multiphase, ultrafast outflow, traced by four separate components in the grating spectrum. One component has high column density and ionization state, and is outflowing at ~0.15c. The other three wind components ha…
Solar Anti-Hale Bipolar Magnetic Regions: A Distinct Population with Systematic Properties
Muñoz-Jaramillo, Andrés; Campusano, Luis E.; Navarrete, Benjamín
Besides their causal connection with long and short-term magnetic variability, solar bipolar magnetic regions are our chief source of insight into the location, size, and properties of large-scale toroidal magnetic structures in the solar interior. The great majority of these regions (≈95%) follow a systematic east-west polarity orientation (Hale'…
Detection of spectral variations of Anomalous Microwave Emission with QUIJOTE and C-BASS
Ashdown, M.; Barreiro, R. B.; Chiang, H. C. +32 more
Anomalous Microwave Emission (AME) is a significant component of Galactic diffuse emission in the frequency range 10- $60\, \mathrm{GHz}$ and a new window into the properties of sub-nanometre-sized grains in the interstellar medium. We investigate the morphology of AME in the ≈10○ diameter λ Orionis ring by combining intensity data from…
Probing the atmosphere of WASP-69 b with low- and high-resolution transmission spectroscopy
Mallonn, M.; López-Puertas, M.; Nagel, E. +31 more
Consideration of both low- and high-resolution transmission spectroscopy is key for obtaining a comprehensive picture of exoplanet atmospheres. In studies of transmission spectra, the continuum information is well established with low-resolution spectra, while the shapes of individual lines are best constrained with high-resolution observations. I…
Galaxy cluster cores as seen with VLT/MUSE: New strong-lensing analyses of RX J2129.4 + 0009, MS 0451.6 - 0305, and MACS J2129.4 - 0741
Richard, Johan; Kneib, Jean-Paul; Jauzac, Mathilde +4 more
We present strong-lensing analyses of three galaxy clusters, RX J2129.4 + 0009 (z = 0.235), MS 0451.6 - 0305 (z = 0.55), and MACS J2129.4 - 0741 (z = 0.589), using the powerful combination of Hubble Space Telescope (HST) multiband observations, and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. In RX J2129, we newly spectroscopically confi…
X-Ray Constraint on the Location of the AGN Torus in the Circinus Galaxy
Tanimoto, Atsushi; Ueda, Yoshihiro; Kawamuro, Taiki +5 more
The location of the obscuring "torus" in an active galactic nucleus (AGN) is still an unresolved issue. The line widths of X-ray fluorescence lines originating from the torus, particularly Fe Kα, carry key information on the radii of line-emitting regions. Utilizing XCLUMPY, an X-ray clumpy torus model, we develop a realistic model of emission lin…