Catching a grown-up starfish planetary nebula – II. Plasma analysis and central star properties of PC 22

Autor: L Sabin, V Gómez-Llanos, C Morisset, V M A Gómez-González, M A Guerrero, H Todt, X Fang
Přispěvatelé: Ministerio de Ciencia e Innovación (España), European Commission, Consejo Nacional de Ciencia y Tecnología (México), Universidad Nacional Autónoma de México
Rok vydání: 2021
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 1365-2966
0035-8711
DOI: 10.1093/mnras/stab3649
Popis: After performing the morpho-kinematic analysis of the planetary nebula (PN) PC 22, we now present its nebular and stellar analysis. The plasma investigation relies on the novel use of a Monte Carlo analysis associated with the PYNEB code for the uncertainty propagation. The innermost region of the nebula shows electronic temperatures Te ≈ 10 800 K using [N II] and ≈13 000 K using [O III] and electronic densities ne ≈ 600 cm−3. We also used for the first time a machine learning algorithm to calculate ionization correction factors (ICFs) specifically adapted to PC 22. This has allowed us to have pioneer ICFs for (S+ + S++)/O++, Cl++/O++, and Ar3+ + Ar4+, as well as a possible new determination for the total abundance of neon. The study of the stellar spectrum revealed the presence of broad emission lines consistent with a Wolf–Rayet-type [WR] classification and more precisely a [WO1] subtype based on different qualitative and quantitative criteria. This classification is also coherent with the high stellar temperature derived from the reproduction of the ionization state of the gas with the Mexican Million Models data base (3MdB) and the best-fitting model obtained with the NLTE model atmosphere code PoWR. PC 22 is therefore a new addition to the [WO1]-subtype PNe. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
LS acknowledges support from PAPIIT grant IN101819 (Mexico). VGL and CM acknowledge grants CONACYT/CB2015 – 254132 and UNAM/PAPIIT – IN101220. VMAGG acknowledges support from the Programa de Becas posdoctorales funded by Dirección General de Asuntos del Personal Académico of the Universidad Nacional Autónoma de México (DGAPA, UNAM). MAG acknowledges support of the grant PGC2018-102184-B-I00 of the Spanish Ministerio de Ciencias, Innovación y Universidades. Also, we want to thank the OAN-SPM staff and the CATT for time allocation. This study is based on observations made with the 2.1 m telescope of the Observatorio Astronómico Nacional at the Sierra de San Pedro Mártir (OAN-SPM), which is a national facility operated by the Instituto de Astronomía of the Universidad Nacional Autónoma de México. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. We have also used archival observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA), and the Canadian Astronomy Data Centre (CADC/NRC/CSA). This paper has been edited using the Overleaf facility.
With funding from the Spanish government through the Severo Ochoa Centre of Excellence accreditation SEV-2017-0709.
Databáze: OpenAIRE
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