2001A&A...377..898B


Query : 2001A&A...377..898B

2001A&A...377..898B - Astronomy and Astrophysics, volume 377, 898-910 (2001/10-3)

An analysis of the light curve of the post common envelope binary MT Serpentis.

BRUCH A., VAZ L.P.R. and DIAZ M.P.

Abstract (from CDS):

Photometric observations of MT Ser, the central star of the planetary nebula Abell 41 are presented. The periodic modulations detected by Grauer & Bond (1983ApJ...271..259G) are confirmed, thus firmly establishing the binary nature of MT Ser. The significantly enlarged time base permits us to derive more accurate ephemeris. The orbital period is either P1=0.113226533 days or twice that value, P2=0.226453066 days. We analyze the light curve (after a careful subtraction of the nebular contribution) with the Wilson-Devinney light curve synthesis routine. Since it is not a priori clear which is the true orbital period of MT Ser, two radically different models, one based on P1 the other on P2 are considered: (1) A low temperature component orbiting around a hot sub-dwarf. The variability is then due to a reflection effect together with ellipsoidal variations of one or both components. (2) Two hot sub-dwarfs of similar temperature and luminosity, partially eclipsing each other and exhibiting ellipsoidal variations. In both models, the primary as well as the secondary component are required to almost fill their respective Roche lobes. A contact configuration is possible. Pros and cons can be found for either of the two models. A final decision between them has to await the observations of a radial velocity curve. The orbital period is currently decreasing at a rate of {dot}(P)/P=-1.15x10–9d–1. Interpreting this as due to mass loss via a stellar winds permits us to estimate mass loss rates depending on the different model assumptions.

Abstract Copyright:

Journal keyword(s): stars: variables: other - stars: individual: MT Ser

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 - 2021
#notes
1 PN A66 41 PN 17 29 02.0257670575 -15 13 04.484004384   16.06 15.95     sdO 132 1

Query : 2001A&A...377..898B

Basic data :
PN A66 41 -- Planetary Nebula
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:
* (CSI,GEN#,...), PN (2013MNRAS,Hen,...), V* (NSV,V*), IR (IRAS,2MASS), El* (2003AstL), HS* (1984ApJ)
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) :
17 29 02.0257670575 -15 13 04.484004384 (Optical) [ 0.0597 0.0480 90 ] A 2018yCat.1345....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) :
17 26 10.2803453229 -15 10 43.071353981 [ 0.0597 0.0480 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) :
009.6620422186260 +10.5141065074375 [ 0.0597 0.0480 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 :
-1.822 -3.691 [0.121 0.090 90] A 2018yCat.1345....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 30 [~] / z(~) 0.000100 [~] / cz 30.00 [~]
   D 1999ApJ...515..610B
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:
sdO C 1984ApJ...280..177G
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.307 0.307 90 (Rad) D 2008ApJ...689..194S
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) :
B 16.06 [~] E ~
V 15.95 [~] E ~
G 16.2677 [0.0101] C 2018yCat.1345....0G
J 15.690 [0.089] C 2003yCat.2246....0C
H 15.806 [0.217] D 2003yCat.2246....0C
K 15.162 [0.178] D 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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within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
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!).
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Some important notes on this object about identifications and objects associations.
notes:

  • The central star is a close binary star.


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (22) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

Hen 2-236 2MASS J17290202-1513043 PN VV' 202 USNO-A2.0 0675-19667520
CSI-15-17262 NSV 8841 PN A66 41 USNO-B1.0 0747-00401620
GEN# +6.20056041 PK 009+10 1 SCM 148 V* MT Ser
GSC2 S2202212270 PN G009.6+10.5 TIC 430768018 Gaia DR2 4136835641106850432
GSC 06235-01036 PN A55 29 UBV M 44669
IRAS 17262-1510 PN Sa 2-205 UBV 14903

References (132 between 1850 and 2021) (Total 132)
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


distance : 1    PM : 1    MK : 1   

   

Observing logs


IUE : 4   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : PN A66 41

Link by name to the catalogue in VizieR :

GSC 06235-01036 IRAS 17262-1510 2MASS J17290202-1513043 NSV 8841 PN G009.6+10.5
USNO-A2.0 0675-19667520 USNO-B1.0 0747-00401620 V* MT Ser Gaia DR2 4136835641106850432

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2021.08.03-07:01:59

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