Interferometric Observations of V838 Monocerotis

  title={Interferometric Observations of V838 Monocerotis},
  author={Benjamin F. Lane and A. J. Retter and R. R. Thompson and J. A. Eisner Mit and Penn State and IPACCaltech and Caltech},
  journal={The Astrophysical Journal},
We have used long-baseline near-IR interferometry to resolve the peculiar eruptive variable star V838 Mon and to provide the first direct measurement of its angular size. Assuming a uniform disk model for the emission, we derive an apparent angular diameter at the time of observations (2004 November-December) of 1.83 ± 0.06 mas. For a nominal distance of 8 ± 2 kpc, this implies a linear radius of 1570 ± 400 R☉. However, the data are somewhat better fitted by elliptical disk or binary component… 
Interferometric Observations of V1663 Aquilae (Nova Aql 2005)
We have resolved the classical nova V1663 Aql using long-baseline near-IR interferometry covering the period from ~5 to 18 days after peak brightness. We directly measure the shape and size of the
Detection of SiO Maser Emission in V838 Mon
We report on the detection of 43GHz SiO maser emission in V838 Mon, a prototype of a new class of eruptive variables, in which a red supergiant was formed after a nova-like eruption in 2002. The
Spectro-interferometric observations of classical nova V458 Vul 2007
We used the Palomar Testbed Interferometer (PTI) to resolve 2.2 $\mu$m emission from the classical nova V458 Vul 2007 over the course of several days following its discovery on 2007 August 8.54 UT.
Interferometric observations of explosive variables: V838 Mon, Nova Aql 2005, and RS Oph
During the last two years we have used the Palomar Testbed Interferometer to observe several explosive variable stars, including V838 Monocerotis, V1663 Aquilae and recently RS Ophiuchi. We observed
V838 Monocerotis: the central star and its environment a decade after outburst
Aims. V838 Monocerotis erupted in 2002, brightened in a series of outbursts, and eventually developed a spectacular light echo. A very red star emerged a few months after the outburst. The whole
Nova Eruptions with Infrared Interferometric Observations
Infrared interferometric observations have a great deal of potential to unravel the nature of the nova eruptions. We suggest that techniques, already in place, to derive the ejection details at
AMBER/VLTI interferometric observations of the recurrent Nova RS Ophiuchii 5.5 days after outburst
Aims.We report on spectrally dispersed interferometric AMBER/VLTI observations of the recurrent nova RS Oph five days after the discovery of its outburst on 2006 Feb. 12. Methods: Using three
High Spatial Resolution Mid-IR Imaging of V838 Monocerotis: Evidence of New Circumstellar Dust Creation
We report high spatial resolution 11.2 and 18.1 μm imaging of V838 Monocerotis obtained with Gemini Observatory's Michelle instrument in 2007 March. Strong emission is observed from the unresolved
Protoplanetary Disk Masses in the Young NGC 2024 Cluster
We present the results from a Submillimeter Array survey of the 887 micron continuum emission from the protoplanetary disks around 95 young stars in the young cluster NGC 2024. Emission was detected
Evolution of V838 Monocerotis during and after the 2002 eruption
By fitting the available photometric data on V838 Mon with standard supergiant spectra we have derived principal stellar parameters, i.e. effective temperature, radius and luminosity, and followed


Observations of Nova Cygni 1992 with a long-baseline optical interferometer
Nova Cygni 1992 was observed with the MkIII optical interferometer on several nights in 1992 February; usable data were obtained on February 28 and 29. This marks the first time that a nova has been
The peculiar variable V838 Monocerotis
Spectroscopic observations of the peculiar variable V838 Mon during the period from the second light outburst until the fast dimming are presented. We describe high resolution (R ≈ 60 000) high S /N
Evolution of the Inner Circumstellar Envelope of V838 Monocerotis
We present imaging polarimetry observations of the eruptive variable V838 Monocerotis and its neighboring field obtained in 2002 October. The polarization of field stars confirms the previously
Main-Sequence Stellar Eruption Model for V838 Monocerotis
We propose that the energy source of the outburst of V838 Mon and similar objects is an accretion event, i.e., gravitational energy rather than thermonuclear runaway. We show that the merger of two
Discovery of multiple shells around V838 Monocerotis
We report the discovery of multiple shells around the eruptive variable star V838 Mon. Two dust shells are seen in IRAS and MSX images, which themselves are situated in a shell of CO. This securely
Permanent Superhumps in Nova V1974 Cygni 1992
We observed V1974 Cygni with a CCD camera attached to the 1-m telescope of the Wise Observatory for 32 nights during the years 1994 and 1995. The two periodicities identified in the light curve,
Near infra-red spectroscopy of V838 Monocerotis
Near - IR, multi - epoch, spectroscopic and photometric observations of the enigmatic, eruptive variable V838 Mon in the JHK bands are reported. One of the unusual features of the spectra is the
We have observed the Herbig Ae/Be sources AB Aur, VV Ser, V1685 Cyg (BD +40°4124), AS 442, and MWC 1080 with the Palomar Testbed Interferometer, obtaining the longest baseline near-IR interferometric
Polarimetric evolution of V838 Monocerotis
We present the results of our polarimetric and spectropolarimetric monitoring of V838 Monocerotis, performed at the Asiago and Crimean observatories during and after the multiple outbursts that
The peculiar variable V838 Mon
V838 Mon underwent, after a first nova-like outburst in January and a usual decline, a second outburst after one month, and a third weak one again a month later. Moreover, a very small increase of