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Morphological Evolution of the Hosts of Far-infrared/Submillimeter Galaxies
Yan, Haojing; Ling, Chenxiaoji
We present a host morphological study of 1266 far-infrared galaxies (FIRGs) and submillimeter galaxies (SMGs) in the Cosmic Evolution Survey field using the F160W and F814W images obtained by the Hubble Space Telescope. The FIRGs and SMGs are selected from the Herschel Multi-tiered Extragalactic Survey and the SCUBA-2 Cosmology Legacy Survey, resp…
Modelling high-resolution ALMA observations of strongly lensed dusty star-forming galaxies detected by Herschel
Serjeant, Stephen; Dunne, Loretta; Cooray, Asantha +15 more
We present modelling of ~0.1 arcsec resolution Atacama Large Millimetre/submillimetre Array imaging of seven strong gravitationally lensed galaxies detected by the Herschel Space Observatory. Four of these systems are galaxy-galaxy strong lenses, with the remaining three being group-scale lenses. Through careful modelling of visibilities, we infer…
Chemistry and physical properties of the born-again planetary nebula HuBi 1
Morisset, C.; Guerrero, M. A.; Toalá, J. A. +4 more
The central star of the planetary nebula (PN) HuBi 1 has been recently proposed to have experienced a very late thermal pulse (VLTP), but the dilution of the emission of the recent ejecta by that of the surrounding H-rich old outer shell has so far hindered confirming its suspected H-poor nature. We present here an analysis of the optical properti…
Quantitative Characterization of Magnetic Flux Rope Properties for Two Solar Eruption Events
Qiu, Jiong; Jiang, Chaowei; Hu, Qiang +2 more
In order to bridge the gap between heliospheric and solar observations of coronal mass ejections (CMEs), one of the key steps is to improve the understanding of their corresponding magnetic structures like the magnetic flux ropes (MFRs). But it remains a challenge to confirm the existence of a coherent MFR before or upon the CME eruption on the Su…
Modelling of multimode radially pulsating high-amplitude δ Scuti stars from the OGLE Galactic bulge sample
Smolec, R.; Netzel, H.
Thanks to relatively firm mode identification, possible based only on period ratios, high-amplitude δ Scuti stars pulsating in at least three radial modes are promising targets for asteroseismic inference. In this study, we used the most numerous sample of HADS from the OGLE inner bulge fields that likely pulsate in either three or four radial mod…
Identification of New Classical Be Stars from the LAMOST Medium Resolution Survey
Gies, Douglas R.; Wang, Luqian; Han, Zhanwen +6 more
Be stars are B-type main-sequence stars that display broad Balmer emission lines in their spectra. Identification of the Be population is essential to further examine the formation and evolutionary models. We report the detection of classical Be (CBe) stars from observations with the Large sky Area Multi-Object fiber Spectroscopic Telescope Medium…
The Yaglom Scaling of the Third-order Structure Functions in the Inner Heliosphere Observed by Helios 1 and 2
He, Jiansen; Wang, Xin; Tu, Chuanyi +2 more
The third-order scaling law, Yaglom law, of Elsässer fluctuations in the solar wind is believed to reflect the inertial range energy cascade of the MHD turbulence and provides an approach to evaluate the cascade rate. However, the occurrence ratio with the Yaglom scaling law, the fraction of the intervals where the Yaglom linear scaling is observe…
Random Forest classification of Gaia DR3 white dwarf-main sequence spectra: A feasibility study
Rebassa-Mansergas, Alberto; Torres, Santiago; Echeverry, David +1 more
Aims: The third Gaia data release provides low-resolution spectra for around 200 million sources. It is expected that a sizeable fraction of them contain a white dwarf (WD), neither isolated, or in a binary system with a main-sequence (MS) companion, that is a white dwarf-main sequence (WDMS) binary. Taking advantage of a consolidated Random …
Apsidal motion in massive eccentric binaries in NGC 6231. The case of HD 152219
Farnir, M.; Dupret, M. -A.; Rauw, G. +2 more
Context. The measurement of the apsidal motion in close eccentric massive binary systems provides essential information to probe the internal structure of the stars that compose the system.
Aims: Following the determination of the fundamental stellar and binary parameters, we make use of the tidally induced apsidal motion to infer constraints…
Activity and Rotation of Nearby Field M Dwarfs in the TESS Southern Continuous Viewing Zone
Rampalli, Rayna; Mann, Andrew W.; Agüeros, Marcel A. +8 more
The evolution of magnetism in late-type dwarfs remains murky, as we can only weakly predict levels of activity for M dwarfs of a given mass and age. We report results from our spectroscopic survey of M dwarfs in the Southern Continuous Viewing Zone (CVZ) of the Transiting Exoplanet Survey Satellite (TESS). As the TESS CVZs overlap with those of th…