J/AJ/162/183 Infrared spectra of V838 Monocerotis with SOFIA (Woodward+, 2021)
The Infrared Evolution of Dust in V838 Monocerotis.
Woodward C.E., Evans A., Banerjee D.P.K., Liimets T., Djupvik A.A.,
Starrfield S., Clayton G.C., Eyres S.P.S., Gehrz R.D., Wagner R.M.
<Astron. J., 162, 183 (2021)>
=2021AJ....162..183W 2021AJ....162..183W
ADC_Keywords: Stars, M-type; Stars, double and multiple; Spectra, infrared
Keywords: Asymptotic giant branch stars ; Circumstellar dust ; Astrochemistry
Abstract:
Luminous Red Variables are most likely eruptions that are the outcome
of stellar mergers. V838Mon is one of the best-studied members of this
class, representing an archetype for stellar mergers resulting from
B-type stars. As result of the merger event, "nova-like" eruptions
occur driving mass loss from the system. As the gas cools considerable
circumstellar dust is formed. V838Mon erupted in 2002 and is
undergoing very dynamic changes in its dust composition, geometry, and
infrared luminosity providing a real-time laboratory to validate
mineralogical condensation sequences in stellar mergers and
evolutionary scenarios. We discuss recent NASA Stratospheric
Observatory for Infrared Astronomy 5-38µm observations combined
with archival NASA Spitzer spectra that document the temporal
evolution of the freshly formed (within the last ≲20yr) circumstellar
material in the environs of V838Mon. Changes in the 10µm spectral
region are strong evidence that we are witnessing a classical dust
condensation sequence expected to occur in oxygen-rich environments
where alumina formation is followed by that of silicates at the
temperature cools.
Description:
Mid-infrared observations of V838Mon were conducted in 2019 October on
three consecutive flight originating from Palmdale, CA, with the SOFIA
airborne observatory using the Faint Object InfraRed CAmera (FORCAST),
the dual-channel mid-infrared imager and grism spectrometer operating
from 5-40µm, mounted at the Nasmyth focus of the 2.5m telescope.
V838Mon was imaged (platescale of 0.768" per pixel) in the
mid-infrared in three filters: F7.7 (λ=0.47µm) narrow band,
F11.2 (λ=2.7µm), and F31.5 (λ=5.7µm).
Objects:
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RA (2000) DE Designation(s)
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07 04 04.82 -03 50 50.6 V838 Mon = V* V838 Mon
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 25 830 V838 Mon SOFIA FORCAST spectra
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See also:
J/A+AS/146/437 : IR spectra of oxygen-rich evolved stars (Speck+, 2000)
J/PAZh/28/764 : UBVR photometry of Nova Mon 2002 (V838 Mon) (Goranskii+, 2002)
J/ApJ/598/L43 : Polarimetry of V838 Mon and stars around (Wisniewski+, 2003)
J/A+A/434/1107 : UBVRIc photometry of stars around V838 Mon (Munari+, 2005)
J/AZh/84/147 : Light curves of V838 Mon and V4332 Sgr (Goranskii+, 2007)
J/A+A/532/A138 : V838 Mon spectrum in 2009 (Tylenda+, 2011)
J/A+A/553/A81 : Refraction of corundum, spinel, α-quartz (Zeidler+,2013)
J/A+A/630/A75 : Six luminous red novae photometry (Pastorello+, 2019)
J/A+A/638/A17 : VLBA SiO masers toward V838 Monocerotis (Ortiz-Leon+, 2020)
J/A+A/646/A119 : M31 luminous red nova AT 2019zhd photometry (Pastorello+,2021)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.5 um Wave [5.1/36.9] Wavelength
10- 17 F8.5 Jy Flux [5.34/38] Flux density
19- 25 F7.5 Jy e_Flux [0.07/3] Uncertainty in Flux
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 20-Dec-2021