Search Publications
A Massive, Clumpy Molecular Gas Distribution and Displaced AGN in Zw 3146
Fabian, A. C.; Combes, F.; McDonald, M. +8 more
We present a recent Atacama Large Millimeter/submillimeter Array observation of the CO(1-0) line emission in the central galaxy of the Zw 3146 galaxy cluster (z = 0.2906). We also present updated X-ray cavity measurements from archival Chandra observations. The 5 × 1010 M⊙ supply of molecular gas, which is confined to the cen…
Testing Photoevaporation and MHD Disk Wind Models through Future High-angular Resolution Radio Observations: The Case of TW Hydrae
Ricci, Luca; Weber, Michael; Ercolano, Barbara +1 more
We present theoretical predictions for the free-free emission at centimeter wavelengths obtained from photoevaporation and magnetohydrodynamic (MHD) wind disk models adjusted to the case of the TW Hydrae young stellar object. For this system, disk photoevaporation with heating due to the high-energy photons from the star has been proposed as a pos…
A Comparison of Star-forming Clumps and Tidal Tails in Local Mergers and High-redshift Galaxies
Calzetti, Daniela; Whitmore, Bradley C.; Chandar, Rupali +8 more
The Clusters, Clumps, Dust, and Gas in Extreme Star-forming Galaxies (CCDG) survey with the Hubble Space Telescope includes multiwavelength imaging of 13 galaxies less than 100 Mpc away, spanning a range of morphologies and sizes, from blue compact dwarfs to luminous infrared galaxies, all with star formation rates in excess of hundreds of solar m…
Forbidden Line Emission from Type Ia Supernova Remnants Containing Balmer-dominated Shells
Leibundgut, Bruno; Raymond, John C.; Chu, You-Hua +3 more
Balmer-dominated shells in supernova remnants (SNRs) are produced by collisionless shocks advancing into a partially neutral medium and are most frequently associated with Type Ia supernovae. We have analyzed Hubble Space Telescope (HST) images and Very Large Telescope (VLT)/Multi-Unit Spectroscopic Explorer (MUSE) or AAT/Wide Field Integral Spect…
Statistics of the Chemical Composition of Solar Analog Stars and Links to Planet Formation
Beaton, Rachael L.; Jain, Bhuvnesh; Teske, Johanna K. +3 more
The Sun has been found to be depleted in refractory (rock-forming) elements relative to nearby solar analogs, suggesting a potential indicator of planet formation. Given the small amplitude of the depletion, previous analyses have primarily relied on high signal-to-noise stellar spectra and a strictly differential approach to determine elemental a…
Interplanetary Coronal Mass Ejections from MAVEN Orbital Observations at Mars
Feng, Xueshang; Wang, Yang; Liu, Libo +9 more
The measurements from the Mars Atmosphere and Volatile EvolutioN spacecraft, in orbit around Mars, are utilized to investigate interplanetary coronal mass ejections (ICMEs) near 1.52 au. We identify 24 ICMEs from 2014 December 6 to 2019 February 21. The ICME list is used to examine the statistical properties of ICMEs. On average, the magnetic fiel…
Fe VII Emission Lines in the Wavelength Range 193-197 Å
Landi, Enrico; Young, Peter R.; Ryabtsev, Alexander N.
The identifications of Fe VII emission lines in the wavelength range 193-197 Å are discussed in the light of new measurements of laboratory spectra and atomic data calculations. This region is of importance to studies of solar spectra from the EUV Imaging Spectrometer (EIS) on board the Hinode spacecraft, which has its peak sensitivity at these wa…
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…
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…
Observing the Stellar Halo of Andromeda in Cosmological Simulations: The AURIGA2PANDAS Pipeline
Grand, Robert J. J.; Gómez, Facundo A.; Fattahi, Azadeh +10 more
We present a direct comparison of the Pan-Andromeda Archaeological Survey (PAndAS) observations of the stellar halo of M31 with the stellar halos of six galaxies from the Auriga simulations. We process the simulated halos through the AURIGA2PANDAS pipeline and create PAndAS-like mocks that fold in all observational limitations of the survey data (…