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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



  history
ID: 225867.0, MPI für Astronomie / Publikationen_mpia
The environment of the optically brightest Herbig Ae Star, HD 104237
Authors:Grady, C. A.; Woodgate, B.; Torres, Carlos A. O.; Henning, Th.; Apai, D.; Rodmann, J.; Wang, Hongchi; Stecklum, B.; Linz, H.; Williger, G. M.; Brown, A.; Wilkinson, E.; Harper, G. M.; Herczeg, G. J.; Danks, A.; Vieira, G. L.; Malumuth, E.; Collins, N. R.; Hill, R. S.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:The Astrophysical Journal
Volume:608
Start Page:809
End Page:830
Review Status:not specified
Audience:Not Specified
Abstract / Description: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/Lsolar)=1.39. With these data,
HD 104237 has an age of t~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 ‚‚Aring;, 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‚‚lt;=0.6" (70 AU) with an inclination angle of
i=18deg+14-11 from
pole-on. The absence of a spatially extended
continuum and fluorescent H2 emission
near Ly‚‚alpha; 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.
Free Keywords:Stars: Circumstellar Matter; ISM: Herbig-Haro
; Objects; ISM: Individual: Alphanumeric: HH 669;
; ISM: Jets and Outflows; Stars: Planetary
; Systems: Protoplanetary Disks; Stars:
; Individual: Henry Draper Number: HD 104237;
; Stars: Pre-Main-Sequence
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Astronomy and Solar Physics, Code 681, NASA
Goddard Space Flight Center, Greenbelt, MD 20771;
<EMAIL>cgrady@echelle.gsfc.nasa.gov</EMAIL>),
AB(Laboratory for Astronomy and Solar Physics,
NASA Goddard Space Flight Center, Greenbelt, MD
20771), AC(Laborat‚‚oacute;rio Nacional de
Astrof‚‚iacute;sica-MCT, Rua Estados Unidos, 154,
Itajub‚‚aacute; 37504-364, Brazil;
<EMAIL>beto@lna.br</EMAIL>),
AD(Max-Planck-Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, Heidelberg D-69117,
Germany), AE(Max-Planck-Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, Heidelberg
D-69117, Germany), AF(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17,
Heidelberg D-69117, Germany),
AG(Max-Planck-Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, Heidelberg D-69117, Germany;
and Purple Mountain Observatory, Academica
Sinica, Nanjing 210008, Peoples Republic of
China), AH(Th‚‚uuml;ringer Landessternwarte
Tautenburg, Sternwarte 5, Tautenburg D-07778 ,
Germany), AI(Th‚‚uuml;ringer Landessternwarte
Tautenburg, Sternwarte 5, Tautenburg D-07778 ,
Germany), AJ(Department of Physics and Astronomy,
Johns Hopkins University, Baltimore, MD 21218),
AK(University of Colorado, Boulder, CO 80309),
AL(University of Colorado, Boulder, CO 80309),
AM(University of Colorado, Boulder, CO 80309),
AN(University of Colorado, Boulder, CO 80309),
AO(SGT, Inc.; and NASA Goddard Space Flight
Center, Code 681, Greenbelt, MD 20771),
AP(Science Systems and Applications, Inc.; and
Code 681, NASA NASA Goddard Space Flight Center,
Greenbelt, MD 20771), AQ(Science Systems and
Applications, Inc.; and Code 681, NASA NASA
Goddard Space Flight Center, Greenbelt, MD
20771), AR(Science Systems and Applications,
Inc.; and Code 681, NASA NASA Goddard Space
Flight Center, Greenbelt, MD 20771), AS(Science
Systems and Applications, Inc.; and Code 681,
NASA NASA Goddard Space Flight Center, Greenbelt,
MD 20771)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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