Optical spectroscopy and X-ray observations of the D-type symbiotic star EF Aql

Simple item page
dc.contributor.authorStoyanov, K. A.
dc.contributor.authorIłkiewicz, K.
dc.contributor.authorLuna, G. J. M.
dc.contributor.authorMikołajewska, J.
dc.contributor.authorMukai, K.
dc.contributor.authorMartí, J.
dc.contributor.authorLatev, G.
dc.contributor.authorBoeva, S.
dc.contributor.authorZamanov, R. K.
dc.date.accessioned2020-10-21T18:50:06Z
dc.date.available2020-10-21T18:50:06Z
dc.date.issued2020-05-07
dc.description.abstractWe performed high-resolution optical spectroscopy and X-ray observations of the recently identified Mira-type symbiotic star EF Aql. Based on high-resolution optical spectroscopy obtained with SALT, we determine the temperature (∼55 000 K) and the luminosity (∼ 5.3 L⊙) of the hot component in the system. The heliocentric radial velocities of the emission lines in the spectra reveal possible stratification of the chemical elements. We also estimate the mass-loss rate of the Mira donor star. Our Swift observation did not detect EF Aql in X-rays. The upper limit of the X-ray observations is 10⁻¹² erg cm⁻² s⁻¹, which means that EF Aql is consistent with the faintest X-ray systems detected so far. Otherwise we detected it with the UVOT instrument with an average UVM2 magnitude of 14.05. During the exposure, EF Aql became approximately 0.2 UVM2 magnitudes fainter. The periodogram analysis of the V-band data reveals an improved period of 320.4±0.3 d caused by the pulsations of the Mira-type donor star. The spectra are available upon request from the authors.en_US
dc.description.sponsorshipWe thank the anonymous referee for the comments which improved the paper. This work is supported by the grant KΠ-06-H28/2 08.12.2018 (Bulgarian National Science Fund). The paper is based on spectroscopic observations made with the Southern African Large Telescope (SALT) under programme 2018-1-MLT-005 (PI: J. Miko lajewska). Polish participation in SALT is funded by grant No. MNiSW DIR/WK/2016/07. This research has been partly founded by the National Science Centre, Poland, through grant OPUS 2017/27/B/ST9/01940 to J. Miko lajewska. GJML is a member of the CIC-CONICET (Argentina) and acknowledge support from grant ANPCYT-PICT 0901/2017. J. Mart´ı acknowledges support by Agencia Estatal de Investigaci´on grant AYA2016-76012-C3-3-P from the Spanish Ministerio de Econom´ıa y Competitividad (MINECO), and by Consejer´ıa de Econom´ıa, Innovaci´on, Ciencia y Empleo of Junta de Andaluc´ıa under research group FQM-322, as well as FEDER funds. We thank Brad Cenko, the PI of the Neil Gehrels Swift observatory, for a general allocation of observing time. 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 and the XRT Data Analysis Software (XRTDAS) developed under the responsibility of the ASI Science Data Center (ASDC), Italy. The authors acknowledge the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. ASASSN is supported by the Gordon and Betty Moore Foundation through grant GBMF5490 to the Ohio State University and NSF grant AST-1515927. Development of ASAS-SN has been supported by NSF grant AST-0908816, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics at the Ohio State University, the Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA), the Villum Foundation, and George Skestos.en_US
dc.description.urihttps://arxiv.org/abs/2005.03379en_US
dc.format.extent8 pagesen_US
dc.genrejournal articles preprintsen_US
dc.identifierdoi:10.13016/m2sjdl-ohgt
dc.identifier.citationStoyanov, K. A.; Iłkiewicz, K.; Luna, G. J. M.; Mikołajewska, J.; Mukai, K.; Martí, J.; Latev, G.; Boeva, S.; Zamanov, R. K.; Optical spectroscopy and X-ray observations of the D-type symbiotic star EF Aql; Solar and Stellar Astrophysics (2020); https://arxiv.org/abs/2005.03379en_US
dc.identifier.urihttp://hdl.handle.net/11603/19950
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.subjectoptical spectroscopyen_US
dc.subjectX-rayen_US
dc.subjectD-type symbiotic staren_US
dc.titleOptical spectroscopy and X-ray observations of the D-type symbiotic star EF Aqlen_US
dc.typeTexten_US

Files

License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection