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157 papers · 1 filter
Helical magnetic field structure in 3C 273. A Faraday rotation analysis using multi-frequency polarimetric VLBA data
Teresa Toscano, Sol N. Molina, José L. Gómez +12
We present a study on rotation measure (RM) of the quasar 3C 273. This analysis aims to discern the magnetic field structure and its temporal evolution. The quasar 3C 273 is one of…
Confirmation of the planetary nebula nature of HaTr 5. Not the remnant of Nova Sco 1437
M. A. Guerrero, E. Santamaria, G. Liberato +6
The identification of the nebula HaTr 5 with the shell remnant of the historic Nova Sco 1437 around the low-accretion rate cataclysmic variable 2MASS J17022815-4306123 has been use…
The JWST-NIRCam View of Sagittarius C. II. Evidence for Magnetically Dominated HII Regions in the CMZ
John Bally, Samuel Crowe, Rubén Fedriani +11
We present JWST-NIRCam narrow-band, 4.05 m Brackett- images of the Sgr C HII region, located in the Central Molecular Zone (CMZ) of the Galaxy. Unlike any HII region in the S…
Evolution, speed, and precession of the parsec-scale jet in the 3C 84 radio galaxy
M. Foschi, J. L. Gómez, A. Fuentes +3
We present high resolution images of the radio source 3C 84 at 43 GHz, from 121 observations conducted by the BEAM-ME monitoring program between 2010 and 2023. Imaging was performe…
Chemical enrichment in LINERs from MaNGA. I. Tracing Oxygen and Nitrogen Nuclear Abundances in LINERs with Varied Ionizing Sources
Borja Pérez-Díaz, Enrique Pérez-Montero, Igor A. Zinchenko +1
The chemical enrichment in low-ionization nuclear emission-line regions (LINERs) is still an issue with spatial resolution spectroscopic data due to the lack of studies and the unc…
The CARMENES search for exoplanets around M dwarfs. The impact of rotation and magnetic fields on the radial velocity jitter in cool stars
H. L. Ruh, M. Zechmeister, A. Reiners +19
Radial velocity (RV) jitter represents an intrinsic limitation on the precision of Doppler searches for exoplanets that can originate from both instrumental and astrophysical sourc…