WFRF:(Piskunov Nikolai professor 1957 )
Sökning: WFRF:(Piskunov Nikolai professor 1957 ) > (2023) > Doppler imaging of ...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03891naa a2200421 4500 | |
| 001 | oai:DiVA.org:uu-524324 | |
| 003 | SwePub | |
| 008 | 240306s2023 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5243242 URI |
| 024 | 7 | a https://doi.org/10.1093/mnras/stad38932 DOI |
| 040 | a (SwePub)uu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Potravnov, I.u RAS, Inst Astron, Pyatnitskaya Str 48, Moscow 119017, Russia.4 aut |
| 245 | 1 0 | a Doppler imaging of a southern ApSi star HD 152564 |
| 264 | 1 | b Oxford University Press,c 2023 |
| 338 | a electronic2 rdacarrier | |
| 520 | a We present the results of the spectroscopic study of a chemically peculiar star HD 152564. Using medium-resolution (R = 37 000) observations obtained with the high-resolution fibre échelle spectrograph mounted on the South African Large Telescope, we determined atmospheric parameters Teff = 11 950 ± 200 K and log g = 3.6 ± 0.2 dex. Abundance analysis revealed mild deficiency of the light elements and an overabundance of up to ∼2 dex of metals, with the greatest excess for silicon. With these characteristics, HD 152564 is a typical member of the silicon subgroup of Ap stars. The rotational modulation of the light curve and line profiles of HD 152564 are typical for the inhomogeneous surface distribution of elements in its atmosphere. We performed multi-element Doppler imaging of the surface of HD 152564. Abundance maps constructed for He, O, Mg, Si, and Fe revealed the concentration of these elements in a sequence of equatorial spots as well as in the circumpolar rings. The photometric maximum of the light curve coincided with the visibility of two most overabundant silicon spots. Abundances determined from the different ionization stages of Fe and Si show clear evidence for vertical stratification of these elements in the atmosphere of HD 152564. Meanwhile, the horizontal distribution of silicon reconstructed from the lines of different ionization stages and excitation energies appears to be identical with increasing average abundance deeper in atmosphere. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a stars: abundances | |
| 653 | a stars: chemically peculiar | |
| 653 | a stars: fundamental parameters | |
| 653 | a stars: imaging | |
| 653 | a stars: individual: HD 152564 | |
| 653 | a starspots | |
| 700 | 1 | a Ryabchikova, T.u RAS, Inst Astron, Pyatnitskaya Str 48, Moscow 119017, Russia.4 aut |
| 700 | 1 | a Piskunov, Nikolai,c professor,d 1957-u Uppsala universitet,Institutionen för fysik och astronomi,Astronomi och rymdfysik4 aut0 (Swepub:uu)nikopisk |
| 700 | 1 | a Pakhomov, Y.u RAS, Inst Astron, Pyatnitskaya Str 48, Moscow 119017, Russia.4 aut |
| 700 | 1 | a Kniazev, A.u South African Astron Observ, POB 9, ZA-7935 Cape Town, South Africa.;Southern African Large Telescope, ZA-7935 Cape Town, South Africa.;Lomonosov Moscow State Univ, Sternberg Astron Inst, Moscow, Russia.;RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia.4 aut |
| 710 | 2 | a RAS, Inst Astron, Pyatnitskaya Str 48, Moscow 119017, Russia.b Institutionen för fysik och astronomi4 org |
| 773 | 0 | t Monthly notices of the Royal Astronomical Societyd : Oxford University Pressg 527:4, s. 10376-10387q 527:4<10376-10387x 0035-8711x 1365-2966 |
| 856 | 4 | u https://doi.org/10.1093/mnras/stad3893y Fulltext |
| 856 | 4 | u https://uu.diva-portal.org/smash/get/diva2:1842828/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-524324 |
| 856 | 4 8 | u https://doi.org/10.1093/mnras/stad3893 |
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