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CO observations toward the isolated mid-infrared bubble S44: External triggering of O-star formation by a cloud-cloud collision
Tachihara, Kengo; Fukui, Yasuo; Sano, Hidetoshi +11 more
We have performed a multi-wavelength study of the mid-infrared bubble S44 to investigate the origin of isolated high-mass star(s) and the star-formation process around the bubble formed by the H II region. We report on the results of new CO observations (12CO, 13CO J = 1-0, and 12CO J = 3-2) toward the isolated bub…
Active gas features in three HSC-SSP CAMIRA clusters revealed by high angular resolution analysis of MUSTANG-2 SZE and XXL X-ray observations
Kohno, Kotaro; Oguri, Masamune; Mroczkowski, Tony +33 more
We present results from simultaneous modelling of high angular resolution GBT/MUSTANG-2 90 GHz Sunyaev-Zel'dovich effect (SZE) measurements and XMM-XXL X-ray images of three rich galaxy clusters selected from the HSC-SSP Survey. The combination of high angular resolution SZE and X-ray imaging enables a spatially resolved multicomponent analysis, w…
Geologic and Thermal Characterization of Oxia Planum Using Mars Odyssey THEMIS Data
Rogers, A. D.; Gary-Bicas, C. E.
Oxia Planum will be the landing site for the European Space Agency ExoMars 2022 "Rosalind Franklin" mission to conduct astrobiological and geological experiments investigating the region's past. Previous orbital short wave infrared (SWIR, 1.0-2.6 µm) spectroscopic studies reported widespread phyllosilicate detections in the region suggesting…
Chemical abundances in Seyfert galaxies - VII. Direct abundance determination of neon based on optical and infrared emission lines
Feltre, Anna; Dors, O. L.; Hägele, G. F. +6 more
For the first time, neon abundance has been derived in the narrow line region from a sample of Seyfert 2 nuclei. In view of this, we compiled from the literature fluxes of optical and infrared (IR) narrow emission lines for 35 Seyfert 2 nuclei in the local universe ($z \:\lesssim \:0.06$). The relative intensities of emission lines were used to de…
Discovery of 2716 hot emission-line stars from LAMOST DR5
Mathew, Blesson; Kartha, Sreeja S.; Kumar, Yerra Bharat +4 more
We present a catalog of 3339 hot emission-line stars (ELSs) identified from 451 695 O, B and A type spectra, provided by LAMOST Data Release 5 (DR5). We developed an automated Python routine that identified 5437 spectra having a peak between 6561 and 6568 Å. False detections and bad spectra were removed, leaving 4138 good emission-line spectra of …
Anomalous gas in ESO 149-G003: a MeerKAT-16 view
Józsa, Gyula I. G.; Wang, Jing; Paterson, Kerry +28 more
ESO 149-G003 is a close-by, isolated dwarf irregular galaxy. Previous observations with the ATCA indicated the presence of anomalous neutral hydrogen ( $\rm{H{\small I}}$ ) deviating from the kinematics of a regularly rotating disc. We conducted follow-up observations with the MeerKAT radio telescope during the 16-dish Early Science programme as w…
The total solar irradiance during the recent solar minimum period measured by SOHO/VIRGO
Schmutz, W.; Finsterle, W.; Montillet, J. P. +3 more
Various space missions have measured the total solar irradiance (TSI) since 1978. Among them the experiments Precision Monitoring of Solar Variability (PREMOS) on the PICARD satellite (2010-2014) and the Variability of Irradiance and Gravity Oscillations (VIRGO) on the mission Solar and Heliospheric Observatory, which started in 1996 and is still …
Combining white light and UV Lyman-α coronagraphic images to determine the solar wind speed. The quick inversion method
Bemporad, A.; Frassati, F.; Giordano, S. +1 more
Context. The availability of multi-channel coronagraphic images in different wavelength intervals acquired from the space will provide a new view of the solar corona, allowing us to investigate the 2D distribution and time evolution of many plasma physical parameters, such as plasma density, temperature, and outflow speed.
Aims: This work foc…
Rotation Periods of TESS Objects of Interest from the Magellan-TESS Survey with Multiband Photometry from Evryscope and TESS
Law, Nicholas M.; Teske, Johanna; Wang, Sharon Xuesong +8 more
Stellar radial-velocity (RV) jitter due to surface activity may bias the RV semiamplitude and mass of rocky planets. The amplitude of the jitter may be estimated from the uncertainty in the rotation period, allowing the mass to be more accurately obtained. We find candidate rotation periods for 17 out of 35 TESS Objects of Interest (TOI) hosting &…
Disintegration of Long-period Comet C/2019 Y4 (ATLAS). I. Hubble Space Telescope Observations
Mutchler, Max; Weaver, Harold A.; Jewitt, David +8 more
The near-Sun comet C/2019 Y4 (ATLAS) is the first member of a long-period comet group observed to disintegrate well before perihelion. Here we present our investigation into this disintegration event using images obtained in a three-day Hubble Space Telescope campaign. We identify two fragment clusters produced by the initial disintegration event,…