The peculiar variable V838 Monocerotis

  title={The peculiar variable V838 Monocerotis},
  author={T. A. Kipper and Valentina Klochkova and Kalju Annuk and Anti Hirv and Indrek Kolka and Laurits Leedj{\"a}rv and Alar Puss and Petr {\vS}koda and Miroslav {\vS}lechta},
  journal={Astronomy and Astrophysics},
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 spectra obtained a day before the second light maximum and low resolution (R ≈ 6000) spectra covering the whole period. The temporal run of intensities and radial velocities of various lines is presented. Using Na  D IS lines we determine the reddening distance of V838 Mon d > 3.1 kpc, and… 
Interferometric Observations of V838 Monocerotis
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
On the progenitor of V838 Monocerotis
We summarize and analyze the available observational data on the progenitor and the environment of V838 Mon. From the available photometric data for the progenitor of V838 Mon we exclude the
V838 Monocerotis (V838 Mon) erupted at the beginning of 2002 becoming an extremely luminous star with L ≃ 106L☉. Among various scenarios proposed to explain the nature of the outburst, the most
The properties of V838 Monocerotis in 2002 November
We present the results of modelling the 0.45-1 μm spectral energy distribution of V838 Mon for 2002 November. Synthetic spectra were calculated using the NextGen model atmospheres of Hauschildt et
High-resolution optical spectroscopy of V838 Monocerotis in 2009
Context. V838 Mon erupted at the beginning of 2002. In the course of the outburst the object evolved to low effective temperatures and declined as a very late M-type supergiant. Among various
How peculiar is the ‘peculiar variable’ DZ Crucis (Nova Cru 2003)?
The variable star DZ Cru was thought to be a nova when it was discovered in eruption in 2003 August. This explanation was later challenged, however, when the first spectra of the object were
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
Spectral evolution of V838 Monocerotis in the optical and near-infrared in early 2002
We report optical and near-infrared spectroscopy, and optical spectropolarimetry, of the peculiar variable V838 Mon during the multiple outburst phase in early 2002. The spectral evolution is
Comparative spectral analysis of the peculiar red novae V838 Mon and V4332 Sgr in quiescence after their outbursts
We analyze spectra of V838 Mon and V4332 Sgr taken in 2004–2005 using the 6 m telescope of the Special Astrophysical Observatory with the UAGS and SCORPIO spectrographs; the spectra have a resolution
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


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
Spectroscopic and Spectropolarimetric Observations of V838 Monocerotis
The spectroscopic and spectropolarimetric variability of the peculiar variable V838 Monocerotis during the brighter phases of its multiple outbursts in 2002 is presented. Significant line profile
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
The double outburst of the unique object V838 Mon
We present spectroscopic and photometric observations of the recent peculiar outburst of V838 Mon, carried out at Rozhen and Torun observatories. Our data cover a period of three months beginning
Narrow Diffuse Interstellar Bands: A Survey with Precise Wavelengths
We present an atlas of 271 diffuse interstellar bands (DIBs) between 4460 and 8800 Å based on echelle spectra (R = 45,000), of which more than 100 are new DIBs discovered in this survey. The atlas is
Nova Monocerotis 2002 (V838 Mon) at early outburst stages
AbstractWe obtained U BV R photometric and spectroscopic observations during the outburst of V838 Mon. Before its outburst, the B brightness of the star had been stable ( $$\tilde15.^m 85$$ ) for 45
The mysterious eruption of V838 Mon
V838 Mon is marking one of the most mysterious stellar outbursts on record. The spectral energy distribution of the progenitor resembles an under-luminous F main sequence star (at V =1 5:6 mag), that
Rare thermonuclear explosions in short-period cataclysmic variables, with possible application to the nova-like red variable in the Galaxy M31
A very bright nova with a peak luminosity significantly larger than the relevant Eddington luminosity might be initiated by a hydrogen shell flash on a very cold low-mass degenerate dwarf accreting
Luminous M Giants in the Bulge of M31
Spectroscopy of luminous red stars in the central bulge of M31 is reported. A number of these are shown to be late-type M giants similar to those in the Baade's window field of the bulge of the Milky
An energetic stellar outburst accompanied by circumstellar light echoes
High-resolution imaging and polarimetry of light echoes indicate that V838 Mon represents a hitherto unknown type of stellar outburst, for which the authors have no completely satisfactory physical explanation.