Discovery of CO gas in the inner disk of TW Hydrae

被引：39

作者：

Rettig, TW ^{[1
]}

Haywood, J

Simon, T

Brittain, SD

Gibb, E

机构：

[1] Univ Notre Dame, Ctr Astrophys, Notre Dame, IN 46556 USA

[2] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 616卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

molecular data; planetary systems : protoplanetary disks; stars : individual (TW Hydrae);

D O I：

10.1086/426433

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of rovibrationally excited CO emission from the inner disk of the classical T Tauri star (cTTS) TW Hya. We observe similar to6 x 10(21) g of CO gas with a rotational temperature of 430 +/- 40 K. The linearity of the excitation plot suggests that the CO is optically thin. Atypical for cTTSs, hot CO was not detected, implying that TW Hya has cleared its inner disk region out to a radial distance of similar to 0.5 AU. We discuss implications for the structure of the disk as it relates to replenishment and planet formation.

引用

页码：L163 / L166

页数：4

共 39 条

[1] Variability of southern T Tauri stars. II. The spectral variability of the classical T Tauri star TW Hydrae [J].

Alencar, SHP ;

Batalha, C .

ASTROPHYSICAL JOURNAL, 2002, 571 (01) :378-393

[2] Mass flow through gaps in circumbinary disks [J].

Artymowicz, P ;

Lubow, SH .

ASTROPHYSICAL JOURNAL, 1996, 467 (02) :L77-+

[3] High-resolution 4.7 micron Keck/NIRSPEC spectroscopy of the CO emission from the disks surrounding Herbig Ae stars [J].

Blake, GA ;

Boogert, ACA .

ASTROPHYSICAL JOURNAL, 2004, 606 (01) :L73-L76

[4] CO emission from disks around AB Aurigae and HD 141569: Implications for disk structure and planet formation timescales [J].

Brittain, SD ;

Rettig, TW ;

Simon, T ;

Kulesa, C ;

DiSanti, MA ;

Dello Russo, N .

ASTROPHYSICAL JOURNAL, 2003, 588 (01) :535-544

[5] Evidence for a developing gap in a 10 Myr old protoplanetary disk [J].

Calvet, N ;

D'Alessio, P ;

Hartmann, L ;

Wilner, D ;

Walsh, A ;

Sitko, M .

ASTROPHYSICAL JOURNAL, 2002, 568 (02) :1008-1016

[6] Carbon monoxide production and excitation in Comet C/1995 O1 (Hale-Bopp): Isolation of native and distributed CO sources [J].

DiSanti, MA ;

Mumma, MJ ;

Dello Russo, N ;

Magee-Sauer, K .

ICARUS, 2001, 153 (02) :361-390

[7] Dispersed T Tauri stars and galactic star formation [J].

Feigelson, ED .

ASTROPHYSICAL JOURNAL, 1996, 468 (01) :306-322

[8] Disk accretion rates for T Tauri stars [J].

Gullbring, E ;

Hartmann, L ;

Briceno, C ;

Calvet, N .

ASTROPHYSICAL JOURNAL, 1998, 492 (01) :323-341

[9]

Haisch KE, 2001, ASTROPHYS J, V553, pL153, DOI 10.1086/320685

[10] The far-ultraviolet spectra of TW Hydrae.: II.: Models of H2 fluorescence in a disk [J].

Herczeg, GJ ;

Wood, BE ;

Linsky, JL ;

Valenti, JA ;

Johns-Krull, CM .

ASTROPHYSICAL JOURNAL, 2004, 607 (01) :369-383

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