Rotation and pulsation in Ap stars: first light results from
TESS sectors 1 and 2

J 2019

Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2

CUNHA, Margarida; Victoria ANTOCI; Daniel HOLDSWORTH; Don KURTZ; Luis BALONA et al.

Základní údaje

Originální název

Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2

Autoři

Vydání

Monthly Notices of the Royal Astronomical Society, OXFORD, OXFORD UNIV PRESS, 2019, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.357

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/19:00111173

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

stars: chemically peculiar; stars: individual; stars: oscillations; stars: magnetic fields; stars: variables

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 25. 3. 2020 19:11, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We present the first results from the Transiting Exoplanet Survey Satellite (TESS) on the rotational and pulsational variability of magnetic chemically peculiar A-type stars. We analyse TESS 2-min cadence data from sectors 1 and 2 on a sample of 83 stars. Five new rapidly oscillating Ap (roAp) stars are announced. One of these pulsates with periods around 4.7 min, making it the shortest period roAp star known to date. Four out of the five new roAp stars are multiperiodic. Three of these and the singly periodic one show the presence of rotational mode splitting. Individual frequencies are provided in all cases. In addition, seven previously known roAp stars are analysed. Additional modes of oscillation are found in some stars, while in others we are able to distinguish the true pulsations from possible aliases present in the ground-based data. We find that the pulsation amplitude in the TESS filter is typically a factor of 6 smaller than that in the B filter, which is usually used for ground-based observations. For four roAp stars we set constraints on the inclination angle and magnetic obliquity, through the application of the oblique pulsator model. We also confirm the absence of roAp-type pulsations down to amplitude limits of 6 and 13 mu mag, respectively, in two of the best characterized non-oscillating Ap (noAp) stars. We announce 27 new rotational variables along with their rotation periods, and provide different rotation periods for seven other stars. Finally, we discuss how these results challenge state-of-the-art pulsation models for roAp stars.

Návaznosti

EF16_027/0008360, projekt VaV

Název: Postdoc@MUNI

Citovat

CUNHA, Margarida; Victoria ANTOCI; Daniel HOLDSWORTH; Don KURTZ; Luis BALONA; Zsofia BOGNAR; Dominic BOWMAN; Zhen GUO; Piotr KOLACZEK-SZYMANSKI; Mariel LARES-MARTIZ; Ernst PAUNZEN; Marek SKARKA; Barry SMALLEY; Adam SODOR; Oleg KOCHUKHOV; Joshua PEPPER; Tyler RICHEY-YOWELL; George RICKER; Sara SEAGER; Derek BUZASI; Lester FOX-MACHADO; Amir HASANZADEH; Ewa NIEMCZURA; Paola QUITRAL-MANOSALVA; Mario MONTEIRO; Ivanka STATEVA; Peter DE CAT; Antonio HERNANDEZ; Hesam GHASEMI; Gerald HANDLER; Daniel HEY; Jaymie MATTHEWS; James NEMEC; Javier PASCUAL-GRANADO; Hossein SAFARI; Juan SUAREZ; Robert SZABO; Andrew TKACHENKO a Werner WEISS. Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2. Monthly Notices of the Royal Astronomical Society. OXFORD: OXFORD UNIV PRESS, 2019, roč. 487, č. 3, s. 3523-3549. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stz1332.

@article{1576477,
   author = {Cunha, Margarida and Antoci, Victoria and Holdsworth, Daniel and Kurtz, Don and Balona, Luis and Bognar, Zsofia and Bowman, Dominic and Guo, Zhen and KolaczekandSzymanski, Piotr and LaresandMartiz, Mariel and Paunzen, Ernst and Skarka, Marek and Smalley, Barry and Sodor, Adam and Kochukhov, Oleg and Pepper, Joshua and RicheyandYowell, Tyler and Ricker, George and Seager, Sara and Buzasi, Derek and FoxandMachado, Lester and Hasanzadeh, Amir and Niemczura, Ewa and QuitralandManosalva, Paola and Monteiro, Mario and Stateva, Ivanka and De Cat, Peter and Hernandez, Antonio and Ghasemi, Hesam and Handler, Gerald and Hey, Daniel and Matthews, Jaymie and Nemec, James and PascualandGranado, Javier and Safari, Hossein and Suarez, Juan and Szabo, Robert and Tkachenko, Andrew and Weiss, Werner},
   article_location = {OXFORD},
   article_number = {3},
   doi = {https://doi.org/10.1093/mnras/stz1332},
   keywords = {stars: chemically peculiar; stars: individual; stars: oscillations; stars: magnetic fields; stars: variables},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2},
   url = {https://academic.oup.com/mnras/article/487/3/3523/5512602},
   volume = {487},
   year = {2019}
}

TY  - JOUR
ID  - 1576477
AU  - Cunha, Margarida - Antoci, Victoria - Holdsworth, Daniel - Kurtz, Don - Balona, Luis - Bognar, Zsofia - Bowman, Dominic - Guo, Zhen - Kolaczek-Szymanski, Piotr - Lares-Martiz, Mariel - Paunzen, Ernst - Skarka, Marek - Smalley, Barry - Sodor, Adam - Kochukhov, Oleg - Pepper, Joshua - Richey-Yowell, Tyler - Ricker, George - Seager, Sara - Buzasi, Derek - Fox-Machado, Lester - Hasanzadeh, Amir - Niemczura, Ewa - Quitral-Manosalva, Paola - Monteiro, Mario - Stateva, Ivanka - De Cat, Peter - Hernandez, Antonio - Ghasemi, Hesam - Handler, Gerald - Hey, Daniel - Matthews, Jaymie - Nemec, James - Pascual-Granado, Javier - Safari, Hossein - Suarez, Juan - Szabo, Robert - Tkachenko, Andrew - Weiss, Werner
PY  - 2019
TI  - Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 487
IS  - 3
SP  - 3523-3549
EP  - 3523-3549
PB  - OXFORD UNIV PRESS
SN  - 00358711
KW  - stars: chemically peculiar
KW  - stars: individual
KW  - stars: oscillations
KW  - stars: magnetic fields
KW  - stars: variables
UR  - https://academic.oup.com/mnras/article/487/3/3523/5512602
L2  - https://academic.oup.com/mnras/article/487/3/3523/5512602
N2  - We present the first results from the Transiting Exoplanet Survey Satellite (TESS) on the rotational and pulsational variability of magnetic chemically peculiar A-type stars. We analyse TESS 2-min cadence data from sectors 1 and 2 on a sample of 83 stars. Five new rapidly oscillating Ap (roAp) stars are announced. One of these pulsates with periods around 4.7 min, making it the shortest period roAp star known to date. Four out of the five new roAp stars are multiperiodic. Three of these and the singly periodic one show the presence of rotational mode splitting. Individual frequencies are provided in all cases. In addition, seven previously known roAp stars are analysed. Additional modes of oscillation are found in some stars, while in others we are able to distinguish the true pulsations from possible aliases present in the ground-based data. We find that the pulsation amplitude in the TESS filter is typically a factor of 6 smaller than that in the B filter, which is usually used for ground-based observations. For four roAp stars we set constraints on the inclination angle and magnetic obliquity, through the application of the oblique pulsator model. We also confirm the absence of roAp-type pulsations down to amplitude limits of 6 and 13 mu mag, respectively, in two of the best characterized non-oscillating Ap (noAp) stars. We announce 27 new rotational variables along with their rotation periods, and provide different rotation periods for seven other stars. Finally, we discuss how these results challenge state-of-the-art pulsation models for roAp stars.
ER  -

CUNHA, Margarida; Victoria ANTOCI; Daniel HOLDSWORTH; Don KURTZ; Luis BALONA; Zsofia BOGNAR; Dominic BOWMAN; Zhen GUO; Piotr KOLACZEK-SZYMANSKI; Mariel LARES-MARTIZ; Ernst PAUNZEN; Marek SKARKA; Barry SMALLEY; Adam SODOR; Oleg KOCHUKHOV; Joshua PEPPER; Tyler RICHEY-YOWELL; George RICKER; Sara SEAGER; Derek BUZASI; Lester FOX-MACHADO; Amir HASANZADEH; Ewa NIEMCZURA; Paola QUITRAL-MANOSALVA; Mario MONTEIRO; Ivanka STATEVA; Peter DE CAT; Antonio HERNANDEZ; Hesam GHASEMI; Gerald HANDLER; Daniel HEY; Jaymie MATTHEWS; James NEMEC; Javier PASCUAL-GRANADO; Hossein SAFARI; Juan SUAREZ; Robert SZABO; Andrew TKACHENKO a Werner WEISS. Rotation and pulsation in Ap stars: first light results from TESS sectors 1 and 2. \textit{Monthly Notices of the Royal Astronomical Society}. OXFORD: OXFORD UNIV PRESS, 2019, roč.~487, č.~3, s.~3523-3549. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stz1332.

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