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Record Details

Record 22 of 690
Pre-main-sequence disk accretion in Z Canis Majoris
External Online Source: doi:10.1086/167252
Author and Affiliation:
Hartmann, L.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Kenyon, S. J.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Hewett, R.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Edwards, S.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Strom, K. M.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Strom, S. E.(Massachusetts, University, Amherst, United States)
Stauffer, J. R.(NASA Ames Research Center, Moffett Field, CA, United States)
Abstract: It is suggested that the pre-main-sequence object Z CMa is a luminous accretion disk, similar in many respects to the FU Orionis variables. Z CMa shows the broad, doubled optical absorption lines expected from a rapidly rotating accretion disk. The first overtone CO absorption detected in Z CMa is blue-shifted, suggesting line formation in a disk wind. Accretion at rates about 0.001 solar mass/yr over 100 yr is required to explain the luminosity of Z CMa. The large amount of material accreted (0.1 solar mass/yr) indicates that Z CMa is in a very early stage of stellar evolution, possibly in an initial phase of massive disk accretion.
Publication Date: Mar 15, 1989
Document ID:
19890043812
(Acquired Nov 28, 1995)
Accession Number: 89A31183
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1; p. 1001-101; (ISSN 0004-637X); 338
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Harvard-Smithsonian Center for Astrophysics; Cambridge, MA, United States
Massachusetts Univ.; Amherst, MA, United States
NASA Ames Research Center; Moffett Field, CA, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCRETION DISKS; PRE-MAIN SEQUENCE STARS; STELLAR EVOLUTION; STELLAR MASS ACCRETION; STELLAR MODELS; INFRARED ASTRONOMY; STELLAR LUMINOSITY; STELLAR SPECTRA; STELLAR WINDS
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 1001-1010. Research supported by the Smithsonian Institution.
Miscellaneous Notes: Research supported by the Smithsonian Institution
Availability Source: Other Sources
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