New Parallaxes for the Upper Scorpius OB Association
نویسندگان
چکیده
منابع مشابه
Debris Disks in the Upper Scorpius Ob Association
We present MIPS 24μm and 70μm photometry for 205 members of the Upper Scorpius OB Association. These data are combined with published MIPS photometry for 15 additional association members to assess the frequency of circumstellar disks around 5 Myr old stars with spectral types between B0 and M5. Twelve stars have a detectable 70μm excess, each of which also has a detectable 24μm excess. A total...
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We present 4.5, 8, and 16 mm photometry from the Spitzer Space Telescope for 204 stars in the Upper Scorpius OB association. The data are used to investigate the frequency and properties of circumstellar disks around stars with masses between ∼0.1 and 20 at an age of ∼5 Myr. We identify 35 stars that have emission at 8 or 16 mm in excess of the M, stellar photosphere. The lower mass stars (∼0.1...
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We present ALMA 880μm continuum observations of 20 K and M-type stars in the Upper Scorpius OB association that are surrounded by protoplanetary disks. These data are used to measure the dust content in disks around low mass stars (0.1-1.6M⊙) at a stellar age of 5-11Myr. Thirteen sources were detected in the 880μm dust continuum at ≥ 3σ with inferred dust masses between 0.3 and 52M⊕. The dust m...
متن کاملSpitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper Scorpius OB Association
We present mid-infrared spectra between 5.2 and 38 μm for 26 disk-bearing members of the ∼5Myr old Upper Scorpius OB association obtained with the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope. We find clear evidence for changes in the spectral characteristics of dust emission between the early (B+A) and late-type (K+M) infrared excess stars. The early-type members exhibit fea...
متن کاملAlma Observations of Circumstellar Disks in the Upper Scorpius Ob Association
We present ALMA observations of 106 G-, K-, and M-type stars in the Upper Scorpius OB Association hosting circumstellar disks. With these data, we measure the 0.88 mm continuum and CO J=3–2 line fluxes of disks around low-mass (0.14–1.66Me) stars at an age of 5–11Myr. Of the 75 primordial disks in the sample, 53 are detected in the dust continuum and 26 in CO. Of the 31 disks classified as de...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2017
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aa9117