Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-04-05
Astrophys.J. 646 (2006) 297-303
Astronomy and Astrophysics
Astrophysics
19 pages, 7 figures, accepted by ApJ
Scientific paper
10.1086/504865
Early observations of T Tauri stars suggested that stars with evidence of circumstellar accretion disks rotated slower than stars without such evidence, but more recent results are not as clear. Near-IR circumstellar disk indicators, though the most widely available, are subject to uncertainties that can result from inner disk holes and/or the system inclination. Mid-infrared observations are less sensitive to such effects, but until now, these observations have been difficult to obtain. The Spitzer Space Telescope now easily enables mid-infrared measurements of large samples of PMS stars covering a broad mass range in nearby star-forming regions. Megeath and collaborators surveyed the Orion Molecular Clouds (~1 Myr) with the IRAC instrument (3.6, 4.5, 5.8, 8 microns) as part of a joint IRAC and MIPS GTO program. We examine the relationship between rotation and Spitzer mid-IR fluxes for ~900 stars in Orion for stars between 3 and 0.1 Msun. We find in these Spitzer data the clearest indication to date that stars with longer periods are more likely than those with short periods to have IR excesses suggestive of disks.
Hartmann Lee
Hora Joseph L.
Megeath Thomas S.
Rebull Luisa M.
Stauffer Joh R.
No associations
LandOfFree
A Correlation Between Pre-Main Sequence Stellar Rotation Rates and IRAC Excesses in Orion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Correlation Between Pre-Main Sequence Stellar Rotation Rates and IRAC Excesses in Orion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Correlation Between Pre-Main Sequence Stellar Rotation Rates and IRAC Excesses in Orion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-418257