The environment of the optically brightest Herbig Ae star, HD 104237

被引:77
作者
Grady, CA
Woodgate, B
Torres, CAO
Apai, THD
Rodmann, J
Wang, HC
Stecklum, B
Linz, H
Williger, GM
Brown, A
Wilkinson, E
Harper, GM
Herczeg, GJ
Danks, A
Vieira, GL
Malumuth, E
Collins, NR
Hill, RS
机构
[1] NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA
[2] MCT, Lab Nacl Astrofis, BR-37504364 Itajuba, Brazil
[3] Max Planck Inst Astron, D-69117 Heidelberg, Germany
[4] Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
关键词
circumstellar matter; ISM : Herbig-Haro objects; ISM : individual (HH 669); ISM : jets and outflows; planetary systems : protoplanetary disks; stars : individual (HD 104237); stars : pre-main-sequence;
D O I
10.1086/420763
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the environment of the nearest Herbig Ae star, HD 104237, with a multiwavelength combination of optical coronagraphic, near-IR, and mid-IR imaging supported by optical, UV, and far-ultraviolet spectroscopy. We confirm the presence of T Tauri stars associated with the Herbig Ae star HD 104237, noted by Feigelson et al. We find that two of the stars within 15" of HD 104237 have IR excesses, potentially indicating the presence of circumstellar disks, in addition to the Herbig Ae star itself. We derive a new spectral type of A7.5Ve-A8Ve for HD 104237 and find log (L/L-circle dot,) = 1.39. With these data, HD 104237 has an age of t approximate to 5 Myr, in agreement with the estimates for the other members of the association. HD 104237 is still actively accreting, with a conspicuous UV/far-UV excess seen down to 1040 A, and is driving a bipolar microjet termed HH 669. This makes it the second, older Herbig Ae star now known to have a microjet. The presence of the microjet enables us to constrain the circumstellar disk to r less than or equal to 0."6 (70 AU) with an inclination angle of i = 18degrees(-11)(+14) from pole-on. The absence of a spatially extended continuum and fluorescent H-2 emission near Lyalpha. is in agreement with the prediction of shadowed disk models for the IR spectral energy distribution. With the high spatial density of disks in this group of stars, proximity, and minimal reddening, HD 104237 and its companions should serve as ideal laboratories for probing the comparative evolution of planetary systems.
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页码:809 / 830
页数:22
相关论文
共 92 条
[1]  
ANDERSSON BG, 2002, FUSE OBSERVERS GUIDE
[2]  
Baraffe I, 1998, ASTRON ASTROPHYS, V337, P403
[3]   JHKLM PHOTOMETRY - STANDARD SYSTEMS, PASSBANDS, AND INTRINSIC COLORS [J].
BESSELL, MS ;
BRETT, JM .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1988, 100 (631) :1134-1151
[4]  
BLONDEL PFC, 1993, ASTRON ASTROPHYS, V268, P624
[5]   SURVEY OF INTER-STELLAR H-I FROM L-ALPHA ABSORPTION-MEASUREMENTS .2. [J].
BOHLIN, RC ;
SAVAGE, BD ;
DRAKE, JF .
ASTROPHYSICAL JOURNAL, 1978, 224 (01) :132-142
[6]   A chromospheric scenario for the activity of β Pictoris, as revealed by FUSE [J].
Bouret, JC ;
Deleuil, M ;
Lanz, T ;
Roberge, A ;
des Etangs, AL ;
Vidal-Madjar, A .
ASTRONOMY & ASTROPHYSICS, 2002, 390 (03) :1049-1061
[7]   The origin of crystalline silicates in the Herbig Be star HD 100546 and in comet Hale-Bopp [J].
Bouwman, J ;
de Koter, A ;
Dominik, C ;
Waters, LBFM .
ASTRONOMY & ASTROPHYSICS, 2003, 401 (02) :577-592
[8]  
BROWN A, 1996, IAU C, V163, P448
[9]  
CHEN C, 2001, FUTURE COOL STAR AST
[10]  
CLAMPIN M, AJ, V126, P385