Discovery of 74 new bright ZZ Ceti stars in the first three years of TESS

被引：35

作者：

Romero, Alejandra D. ^{[1
]}

Kepler, S. O. ^{[1
]}

Hermes, J. J. ^{[2
,3
]}

Amaral, Larissa Antunes ^{[1
,4
]}

Uzundag, Murat ^{[4
,5
]}

Bognar, Zsofia ^{[6
,7
]}

Bell, Keaton J. ^{[8
]}

VanWyngarden, Madison ^{[2
,3
]}

Baran, Andy ^{[9
,10
,11
]}

Pelisoli, Ingrid ^{[12
]}

Oliveira, Gabriela da Rosa ^{[1
]}

Koester, Detlev ^{[13
]}

Klippel, T. S. ^{[1
]}

Fraga, Luciano ^{[14
]}

Bradley, Paul A. ^{[15
]}

Heintz, Tyler M. ^{[2
,3
]}

Reding, Joshua S. ^{[16
]}

Kaiser, B. C. ^{[16
]}

Charpinet, Stephane ^{[17
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[2] Boston Univ, Dept Astron, 725 Commonwealth Ave, Boston, MA 02215 USA

[3] Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA

[4] Univ Valparaiso, Inst Fis & Astron, Gran Bretana 1111, Valparaiso 2360102, Chile

[5] European Southern Observ, Santiago 3107, Chile

[6] Eotvos Lorand Res Network ELKH, Konkoly Observ, Res Ctr Astron & Earth Sci, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary

[7] Konkoly Observ Budapest, MTA CSFK Lendulet Near Field Cosmol Res Grp, Budapest, Hungary

[8] Univ Washington, DIRAC Inst, Dept Astron, Seattle, WA 98195 USA

[9] Pedag Univ Cracow, Inst Phys, ARDASTELLA Res Grp, Ul Podchorazych 2, PL-30084 Krakow, Poland

[10] Embry Riddle Aeronaut Univ, Depariment Phys Sci, Daytona Beach, FL 32114 USA

[11] Missouri State Univ, Dept Phys Astron & Mat Sci, Springfield, MO 65897 USA

[12] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[13] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

[14] Lab Nacl Astrofis LNA MCTIC, BR-37504364 Itajuba, MG, Brazil

[15] MS F699 Los Alamos Natl Lab, XCP 6, Los Alamos, NM 87545 USA

[16] Univ North Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[17] Univ Toulouse, CNRS, UPS, CNES,IRAP, 14 Ave Edouard Belin, F-31400 Toulouse, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 511卷 / 02期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

surveys; stars: oscillations; stars: white dwarfs; DA WHITE-DWARFS; SPECTRAL EVOLUTION; GRAVITY MODES; MASS; HYDROGEN; ASTEROSEISMOLOGY; EXTRACTION; ALGORITHM; ROTATION; CATALOG;

D O I：

10.1093/mnras/stac093

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of 74 new pulsating DA white dwarf stars, or ZZ Cetis, from the data obtained by the Transiting Exoplanet Survey Satellite mission, from Sectors 1 to 39, corresponding to the first 3 cycles. This includes objects from the Southern hemisphere (Sectors 1-13 and 27-39) and the Northern hemisphere (Sectors 14-26), observed with 120 s- and 20 s-cadence. Our sample likely includes 13 low-mass and one extremely low-mass white dwarf candidate, considering the mass determinations from fitting Gaia magnitudes and parallax. In addition, we present follow-up time series photometry from ground-based telescopes for 11 objects, which allowed us to detect a larger number of periods. For each object, we analysed the period spectra and performed an asteroseismological analysis, and we estimate the structure parameters of the sample, i.e. stellar mass, effective temperature, and hydrogen envelope mass. We estimate a mean asteroseismological mass of < M-sis & rang; = 0.635 +/- 0.015 M-circle dot, excluding the candidate low or extremely low-mass objects. This value is in agreement with the mean mass using estimates from Gaia data, which is < M-phot & rang; = 0.631 +/- 0.040 M-circle dot, and with the mean mass of previously known ZZ Cetis of < M-*& rang; = 0.644 +/- 0.034 M-circle dot. Our sample of 74 new bright ZZ Cetis increases the number of known ZZ Cetis by similar to 20 per cent.

引用

页码：1574 / 1590

页数：17

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