2009A&A...503..899T

Query : 2009A&A...503..899T

2009A&A...503..899T - Astronomy and Astrophysics, volume 503, 899-907 (2009/9-1)

An analysis of a spectrum of V838 Monocerotis in October 2005.

TYLENDA R., KAMINSKI T. and SCHMIDT M.

Abstract (from CDS):

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 promising is a stellar merger event. We attempt to obtain information about the structure and evolution of the object in the decline from the 2002 eruption. The results of spectroscopic observations of the object obtained in October 2005 with the Keck/HIRES instrument, presented in detail in Paper I, are analysed and discussed. Modelling of the observed line profiles has been used to constrain the physical parameters of the system. The kinematics of the atmosphere of V838 Mon is very complex. Our analysis of the molecular bands and the P-Cyg profiles of atomic lines shows that the object loses matter with a velocity of up to 215km/s and a rate of 10–6-10–5M☉/yr. In the profiles of some atomic lines, we have, however, found evidence of matter infall. Moreover, a narrow absorption component, which is particularly strong in some P-Cyg profiles, may indicate that a jet-like outflow has also been formed. We show that the observed emission in the [FeII] lines and an eclipse-like event observed in November/December 2006 was probably caused by interactions of the expanding matter, ejected by V838 Mon in 2002, with radiation from the B3V companion. In particular, the observed profiles of the [FeII] lines can be easily modelled in this scenario and allow us to estimate parameters of the system, such as the position of the B3V companion relative to V838 Mon and the line of sight, density in the outflowing matter, and mass lost in the 2002 eruption. The observed appearance of strong Hα emission, just before and during the eclipse-like event, can be interpreted as a result of the accretion of the outflowing matter onto the B3V companion: the accreted matter, shocked above the stellar surface, can be a source of extreme-UV and soft X-ray radiation capable of ionizing and exciting H in the outflow.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: V838 Monocerotis - stars: late-type - stars: early-type - stars: peculiar - stars: winds, outflows - line: profiles

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* V838 Mon No* 07 04 04.8221494992 -03 50 50.648894412       15.181 14.51 M10+B3V 426 0

Query : 2009A&A...503..899T

Basic data :
V* V838 Mon -- Classical Nova
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		* (GSC,UCAC4,...), No* (2017ARep,NOVA), V* (V*,AAVSO), Mas (2019ApJ,[RMB2014]), NIR (DENIS,2MASS), MIR (WISEA,WISE), IR (IRAS,PSCz), LP* (2022yCat), ** (2003IAUC)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		07 04 04.8221494992 -03 50 50.648894412 (Optical) [ 0.0506 0.0499 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		07 01 35.3704612790 -03 46 19.377744185 [ 0.0506 0.0499 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		217.7973714516408 +01.0521704819781 [ 0.0506 0.0499 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		-0.403 0.807 [0.067 0.058 90] A 2020yCat.1350....0G
Syntax of Velocity of Local System is : "VSLR Vmin Vmax [error] (wavelength) bibcode"
  • VLSR : central velocity (km/s)
  • Vmin : minimum of the velocity range (km/s)
  • Vmax : maximum of the velocity range (km/s)
  • [error] : velocity resolution (km/s)
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • bibcode : bibcode of the origin of the velocity
VLSR : 		49 ~ ~ [5] (Rad) 2019ApJ...885..131R
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		0.163 [0.016] C 2019ApJ...885..131R
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type: 		M10+B3V C 2003IAUC.8202....1W
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (6) :
R 15.181 [0.08] E 2012yCat.1322....0Z
G 11.139417 [0.006083] C 2020yCat.1350....0G
I 14.51 [0.03] C 2005yCat.2263....0D
J 13.873 [0.047] C 2003yCat.2246....0C
H 13.510 [0.063] C 2003yCat.2246....0C
K 13.333 [0.060] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!). sed-help-icon

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (19) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NOVA Mon 2002 PSCz P07015-0346 V* V838 Mon EQ J0704.0-0350
DENIS J070404.8-035050 TIC 33366214 WISEA J070404.82-035050.8 AAVSO 0659-03
GSC 04822-00039 UCAC4 431-026681 WISE J070404.82-035050.5 Gaia DR3 3107789548859766016
IRAS 07015-0346 USNO-A2.0 0825-03833116 [RMB2014] G217.79+01.05 Gaia DR2 3107789548859766016
2MASS J07040482-0350506 USNO-B1.0 0861-00120000 [WBM2003] 1

References (426 between 1850 and 2024) (Total 426)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 1    V* : 1    PLX : 1    PM : 3    MK : 1   

   

Observing logs


herschel : 24   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : V* V838 Mon

Link by name to the catalogue in VizieR :

DENIS J070404.8-035050 GSC 04822-00039 IRAS 07015-0346 2MASS J07040482-0350506 UCAC4 431-026681
USNO-A2.0 0825-03833116 USNO-B1.0 0861-00120000 V* V838 Mon WISEA J070404.82-035050.8 WISE J070404.82-035050.5
Gaia DR3 3107789548859766016 Gaia DR2 3107789548859766016

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