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The environment of the optically brightest Herbig Ae star, HD 104237
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
AbstractWe 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.
KeywordCircumstellar 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
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000222184300018
Citation statistics
Cited Times:68[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
GB/T 7714
Grady, CA,Woodgate, B,Torres, CAO,et al. The environment of the optically brightest Herbig Ae star, HD 104237[J]. ASTROPHYSICAL JOURNAL,2004,608(2):809-830.
APA Grady, CA.,Woodgate, B.,Torres, CAO.,Apai, THD.,Rodmann, J.,...&Hill, RS.(2004).The environment of the optically brightest Herbig Ae star, HD 104237.ASTROPHYSICAL JOURNAL,608(2),809-830.
MLA Grady, CA,et al."The environment of the optically brightest Herbig Ae star, HD 104237".ASTROPHYSICAL JOURNAL 608.2(2004):809-830.
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