SPECTRAL CLASSIFICATION AND PROPERTIES OF THE O Vz STARS IN THE GALACTIC O-STAR SPECTROSCOPIC SURVEY (GOSSS)

被引：26

作者：

Arias, Julia I. ^{[1
]}

Walborn, Nolan R. ^{[2
]}

Simon Diaz, Sergio ^{[3
,4
]}

Barba, Rodolfo H. ^{[1
]}

Maiz Apellaniz, Jesus ^{[5
]}

Sabin-Sanjulian, Carolina ^{[1
]}

Gamen, Roberto C. ^{[6
]}

Morrell, Nidia I. ^{[7
]}

Sota, Alfredo ^{[8
]}

Marco, Amparo ^{[9
,10
]}

Negueruela, Ignacio ^{[9
]}

Leao, Joao R. S. ^{[11
]}

Herrero, Artemio ^{[3
,4
]}

Alfaro, Emilio J. ^{[8
]}

机构：

[1] Univ La Serena, Dept Fis & Astron, Av Cisternas 1200 Norte, La Serena, Chile

[2] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[3] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain

[4] Univ La Laguna, Dept Astrofis, E-38205 Tenerife, Spain

[5] CSIC INTA, Ctr Astrobiol, Campus ESAC,Camino Bajo Castillo S-N, E-28692 Madrid, Spain

[6] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, Inst Astrofis La Plata, CONICET, Paseo Bosque S-N, RA-1900 La Plata, Buenos Aires, Argentina

[7] Carnegie Observ, Las Campanas Observ, Casilla 601, La Serena, Chile

[8] Inst Astrofis Andalucia CSIC, Glorieta Astron S-N, E-18008 Granada, Spain

[9] Univ Alicante, Dept Fis Ingn Sistemas & Teoria Senal, Escuela Politecn Super, Carretera San Vicente del Raspeig S-N, E-03690 San Vicente Del Raspeig, Spain

[10] Univ Florida, Dept Astron, Bryant Space Sci Ctr 211, Gainesville, FL 32611 USA

[11] Univ Fed Rio Grande Norte UFRN, Caixa Postal 1524,Campus Univ Lagoa Nova, BR-59078970 Natal, RN, Brazil

来源：

ASTRONOMICAL JOURNAL | 2016年 / 152卷 / 02期

关键词：

stars: early-type; stars: fundamental parameters; surveys; ATMOSPHERIC NLTE-MODELS; UPPER MAIN-SEQUENCE; 30; DORADUS; STELLAR CONTENT; EMISSION-LINES; NORTHERN STARS; MASSIVE STARS; BLUE STARS; CLUSTER; ASSOCIATIONS;

D O I：

10.3847/0004-6256/152/2/31

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

On the basis of the Galactic O Star Spectroscopic Survey (GOSSS), we present a detailed systematic investigation of the O Vz stars. The currently used spectral classification criteria are rediscussed, and the Vz phenomenon is recalibrated through the addition of a quantitative criterion based on the equivalent widths of the He I lambda 4471, He II lambda 4542, and He II lambda 4686 spectral lines. The GOSSS O Vz and O V populations resulting from the newly adopted spectral classification criteria are comparatively analyzed. The locations of the O Vz stars are probed, showing a concentration of the most extreme cases toward the youngest star-forming regions. The occurrence of the Vz spectral peculiarity in a solar-metallicity environment, as predicted by the FASTWIND code, is also investigated, confirming the importance of taking into account several processes for the correct interpretation of the phenomenon.

引用

页数：19

共 48 条

[1]

Barbá RH, 2010, REV MEX AST ASTR, V38, P30

[2]

Bonnarel F, 2000, ASTRON ASTROPHYS SUP, V143, P33, DOI 10.1051/aas:2000331

[3]

Conti P. S., 1971, APJ, V170, P3

[4] SPECTROSCOPIC OBSERVATIONS OF O-TYPE STARS .5. HYDROGEN LINES AND LAMBDA-4686 HE-II [J].

CONTI, PS ;

LEEP, EM .

ASTROPHYSICAL JOURNAL, 1974, 193 (01) :113-124

[5] The VLT-FLAMES Tarantula Survey I. Introduction and observational overview [J].

Evans, C. J. ;

Taylor, W. D. ;

Henault-Brunet, V. ;

Sana, H. ;

de Koter, A. ;

Simon-Diaz, S. ;

Carraro, G. ;

Bagnoli, T. ;

Bastian, N. ;

Bestenlehner, J. M. ;

Bonanos, A. Z. ;

Bressert, E. ;

Brott, I. ;

Campbell, M. A. ;

Cantiello, M. ;

Clark, J. S. ;

Costa, E. ;

Crowther, P. A. ;

de mink, S. E. ;

Doran, E. ;

Dufton, P. L. ;

Dunstall, P. R. ;

Friedrich, K. ;

Garcia, M. ;

Gieles, M. ;

Graefener, G. ;

Herrero, A. ;

Howarth, I. D. ;

Izzard, R. G. ;

Langer, N. ;

Lennon, D. J. ;

Maiz Apellaniz, J. ;

Markova, N. ;

Najarro, F. ;

Puls, J. ;

Ramirez, O. H. ;

Sabin-Sanjulian, C. ;

Smartt, S. J. ;

Stroud, V. E. ;

van Loon, J. Th. ;

Vink, J. S. ;

Walborn, N. R. .

ASTRONOMY & ASTROPHYSICS, 2011, 530

[6] Microwave interstellar medium emission observed by the Wilkinson Microwave Anisotropy Probe [J].

Finkbeiner, DP .

ASTROPHYSICAL JOURNAL, 2004, 614 (01) :186-193

[7]

HAVLEN RJ, 1977, ASTRON ASTROPHYS, V58, P351

[8] Global survey of star clusters in the Milky Way [J].

Kharchenko, N. V. ;

Piskunov, A. E. ;

Schilbach, E. ;

Roeser, S. ;

Scholz, R. -D. .

ASTRONOMY & ASTROPHYSICS, 2013, 558

[9] WIDE-FIELD INFRARED SURVEY EXPLORER OBSERVATIONS OF THE EVOLUTION OF MASSIVE STAR-FORMING REGIONS [J].

Koenig, X. P. ;

Leisawitz, D. T. ;

Benford, D. J. ;

Rebull, L. M. ;

Padgett, D. L. ;

Assef, R. J. .

ASTROPHYSICAL JOURNAL, 2012, 744 (02)

[10]

Lorenzo J, 2010, ASTR SOC P, V435, P409

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