Abstract
Modeling the submillimeter to centimeter emission of stars is challenging due to a lack of sensitive observations at these long wavelengths. We launched an ongoing campaign to obtain new observations entitled Measuring the Emission of Stellar Atmospheres at Submillimeter/millimeter wavelengths (MESAS). Here we present Atacama Large Millimeter/submillimeter Array, Green Bank Telescope, and Very Large Array observations of Sirius A, the closest main-sequence A-type star, that span from 1.4 to 9.0 mm. These observations complement our previous millimeter data on Sirius A and are entirely consistent with the PHOENIX stellar atmosphere models constructed to explain them. We note that accurate models of long-wavelength emission from stars are essential not only to understand fundamental stellar processes, but also to determine the presence of dusty debris in spatially unresolved observations of circumstellar disks.
| Original language | English |
|---|---|
| Article number | 55 |
| Journal | Astrophysical Journal |
| Volume | 875 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - ápr. 10 2019 |
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ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
The MESAS Project : Long-wavelength Follow-up Observations of Sirius A. / White, Jacob Aaron; Aufdenberg, J.; Boley, A. C.; Devlin, M.; Dicker, S.; Hauschildt, P.; Hughes, A. G.; Hughes, A. M.; Mason, B.; Matthews, B.; Moór, A.; Mroczkowski, T.; Romero, C.; Sievers, J.; Stanchfield, S.; Tapia, F.; Wilner, D.
In: Astrophysical Journal, Vol. 875, No. 1, 55, 10.04.2019.Research output: Article
}
TY - JOUR
T1 - The MESAS Project
T2 - Long-wavelength Follow-up Observations of Sirius A
AU - White, Jacob Aaron
AU - Aufdenberg, J.
AU - Boley, A. C.
AU - Devlin, M.
AU - Dicker, S.
AU - Hauschildt, P.
AU - Hughes, A. G.
AU - Hughes, A. M.
AU - Mason, B.
AU - Matthews, B.
AU - Moór, A.
AU - Mroczkowski, T.
AU - Romero, C.
AU - Sievers, J.
AU - Stanchfield, S.
AU - Tapia, F.
AU - Wilner, D.
PY - 2019/4/10
Y1 - 2019/4/10
N2 - Modeling the submillimeter to centimeter emission of stars is challenging due to a lack of sensitive observations at these long wavelengths. We launched an ongoing campaign to obtain new observations entitled Measuring the Emission of Stellar Atmospheres at Submillimeter/millimeter wavelengths (MESAS). Here we present Atacama Large Millimeter/submillimeter Array, Green Bank Telescope, and Very Large Array observations of Sirius A, the closest main-sequence A-type star, that span from 1.4 to 9.0 mm. These observations complement our previous millimeter data on Sirius A and are entirely consistent with the PHOENIX stellar atmosphere models constructed to explain them. We note that accurate models of long-wavelength emission from stars are essential not only to understand fundamental stellar processes, but also to determine the presence of dusty debris in spatially unresolved observations of circumstellar disks.
AB - Modeling the submillimeter to centimeter emission of stars is challenging due to a lack of sensitive observations at these long wavelengths. We launched an ongoing campaign to obtain new observations entitled Measuring the Emission of Stellar Atmospheres at Submillimeter/millimeter wavelengths (MESAS). Here we present Atacama Large Millimeter/submillimeter Array, Green Bank Telescope, and Very Large Array observations of Sirius A, the closest main-sequence A-type star, that span from 1.4 to 9.0 mm. These observations complement our previous millimeter data on Sirius A and are entirely consistent with the PHOENIX stellar atmosphere models constructed to explain them. We note that accurate models of long-wavelength emission from stars are essential not only to understand fundamental stellar processes, but also to determine the presence of dusty debris in spatially unresolved observations of circumstellar disks.
KW - circumstellar matter
KW - radio continuum: stars
KW - stars: atmospheres
KW - stars: individual (Sirius A)
KW - submillimeter: stars
UR - http://www.scopus.com/inward/record.url?scp=85067187801&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067187801&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ab0e7f
DO - 10.3847/1538-4357/ab0e7f
M3 - Article
AN - SCOPUS:85067187801
VL - 875
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 55
ER -