Detection of accreting gas toward HD 45677
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Detection of accreting gas toward HD 45677 a newly recognized, Herbig Be proto-planetary system by

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

Subjects:

  • Accretion (Astrophysics)

Book details:

Edition Notes

StatementG.A. Grady.
Series[NASA contractor report] -- NASA CR-189312., NASA contractor report -- NASA CR-189312.
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL14699789M

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Detection of accreting gas toward HD a newly recognized, Herbig Be proto-planetary system. [G A Grady; United States. National Aeronautics and Space Administration.]. Description We report detection of high velocity, accreting gas toward the Be star with IR excess and bipolar nebula, HD High velocity (+ to + km/s), variable column density gas is visible in all IUE spectra from in transitions of Si II, C II, Al III, Fe III, Si IV, and C IV. We report the detection of high-velocity, accreting gas toward the BE(e) star with IR excess and bipolar nebula, HD High-velocity (+ to + km/s), variable column density gas is visible. SAO/NASA Astrophysics Data System (ADS) Title: Detection of accreting gas toward HD - A newly recognized, Herbig Be proto-planetary system Authors: Grady, C. A.

Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume “Detection of accreting gas toward HD a newly recognized, Herbig Be proto-planetary system.” Astrophys. J., ,L39–L CrossRef Sicardy B. () Small Bodies around Other Stars. In: Milani A., Di Martino M. The time scale of this "flickering" ranges from days down to hours and is explained by instabilities in accretion flows towards HD The accretion mechanisms can be the origin of the. Abstract. We present archival and recent IUE high dispersion spectra of late B stars which reveal the presence of accreting gas with velocities as high as kms-1, collisional ionization of the accreting gas to temperatures above the stellar T eff, and column densities intermediate between those observed toward classical Herbig Ae/Be stars and the nearby proto-planetary system β Pictoris. Abstract. Analysis of IUE high- and low-dispersion spectra of the young Herbig Ae star HR (HD ) covering – has revealed dramatic changes in the Mg II h and k (, Å) emission profiles, changes in the column density and distribution in radial velocity of accreting gas, and flux in the Lyα, OI and CIV emission lines, which are correlated with the UV excess.

Detection of accreting gas rules out identification of HD as a post-AGB object, and instead suggests that we have found one of the missing disk-edge-on Herbig . What Can HD B Tell Us About Accreting Objects in Transitional Disks? Our detection of an accreting low-mass companion in Figure 3 opens an exciting new window on the coupled processes of accretion onto a circumsecondary disk and accretion from the circumsecondary disk to the forming planet (or brown dwarf/low-mass star). M. R. Perez's 66 research works with citations and reads, including: A young and complex binary star - HD We find accreting, circumstellar gas over the velocity range + to + km s$^{-1}$, and absorption profiles similar to those seen toward $\beta$ Pic, in 36% of the 33 HAeBe stars with IUE data.