On the origin of H2CO abundance enhancements in low-mass protostars
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On the origin of H2CO abundance enhancements in low-mass protostars. / Schöier, F. L.; Jørgensen, J. K.; Van Dishoeck, E. F.; Blake, Geoffrey A.
In: Astronomy and Astrophysics, Vol. 418, No. 1, 01.04.2004, p. 185-202.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - On the origin of H2CO abundance enhancements in low-mass protostars
AU - Schöier, F. L.
AU - Jørgensen, J. K.
AU - Van Dishoeck, E. F.
AU - Blake, Geoffrey A.
PY - 2004/4/1
Y1 - 2004/4/1
N2 - The line observations of high angular resolution H2CO 218 GHz were investigated in low-mass protostars IRAS 16293-2422 and L1448-C. There was excess unresolved compact emission centered for both sources which occurred due to accretion disks <200AU in size. The constant H2CO abundance throughout the envelope cannot fit interferometer data of two H2CO lines simultaneously on longest and shortest baselines. H2CO abundance drops in cold dense part provides good fits to single-dish and interferometer data on short baselines for both sources.
AB - The line observations of high angular resolution H2CO 218 GHz were investigated in low-mass protostars IRAS 16293-2422 and L1448-C. There was excess unresolved compact emission centered for both sources which occurred due to accretion disks <200AU in size. The constant H2CO abundance throughout the envelope cannot fit interferometer data of two H2CO lines simultaneously on longest and shortest baselines. H2CO abundance drops in cold dense part provides good fits to single-dish and interferometer data on short baselines for both sources.
KW - Astrochemistry
KW - ISM: abundances
KW - Stars: circumstellar matter
KW - Stars: formation
KW - Stars: individual: IRAS 16293-2422, L1448-C
UR - http://www.scopus.com/inward/record.url?scp=2342502604&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20035769
DO - 10.1051/0004-6361:20035769
M3 - Journal article
AN - SCOPUS:2342502604
VL - 418
SP - 185
EP - 202
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
IS - 1
ER -
ID: 234016445