CDS

1997A&A...327..173F

Query : 1997A&A...327..173F

1997A&A...327..173F - Astronomy and Astrophysics, volume 327, 173-182 (1997/11-1)

HS 1804+6753: a new eclipsing CV above the period gap.

FIEDLER H., BARWIG H. and MANTEL K.H.

Abstract (from CDS):

We present spectroscopic and photometric observations of the cataclysmic variable HS 1804+6753, a new eclipsing dwarf nova of the U Gem class. Its apparent visual brightness in quiescence is Mv≃14mag. During its frequent outbursts the brightness increases by 1mag-2.3mag. From our photometric data, we determined the orbital period to be P=0.2099370d±0.0000001d. The spectroscopic observations show the spectral lines of both stellar components. In quiescence, emission lines of HI, HeI, HeII, CII, and CIII, as well as absorption lines of FeI, FeII, TiII, and OI moving in phase with the primary are visible. During an outburst, additional emission lines of NII, NIII, HeII, and CIII appear. The motion of the secondary can only be derived from a few CaI absorption lines. The orbital inclination of the system is determined to be i=(84.2±0.6)°. From radial velocities of both components, the respective masses are calculated, yielding M1=(0.75±0.02)M☉ and M2=(0.56±0.02)M☉. The mass ratio derived from photometric data confirms the spectroscopic results. The radii of the two components are calculated to be R1=(1.3±0.1)x10–2R☉ and R2=(0.57±0.01)R☉. Several outbursts have been observed so far indicating a relatively high repetition rate.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: eclipsing - stars: individual: HS 1804+6753 - stars: novae, cataclysmic variables

Simbad objects: 1

goto View the references in ADS

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 - 2022 		#notes
1 V* EX Dra CV* 18 04 14.2485669576 +67 54 12.273781392   14.5 14.7     ~ 121 0

Query : 1997A&A...327..173F

Basic data :
V* EX Dra -- Cataclysmic Variable Star
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: 		V* (V*,[DWS97],...), X (2E,1E,...), * (GSC,Gaia), CV* (2012A&A), PM* (PM), IR (2MASS), UV (KUV)
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) : 		18 04 14.2485669576 +67 54 12.273781392 (Optical) [ 0.0205 0.0232 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) : 		18 04 24.6558322946 +67 53 52.801625092 [ 0.0205 0.0232 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) : 		097.9289529429893 +29.4033907830474 [ 0.0205 0.0232 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 : 		34.017 10.493 [0.026 0.034 90] A 2020yCat.1350....0G
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): 		4.1467 [0.0219] A 2020yCat.1350....0G
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 14.5 [~] E ~
V 14.7 [~] D 2014AJ....148..115S
G 14.414952 [0.035144] C 2020yCat.1350....0G
J 12.882 [0.023] C 2003yCat.2246....0C
H 12.265 [0.021] C 2003yCat.2246....0C
K 12.060 [0.025] 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
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
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!). 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 (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2E 4012 HS 1804+6753 RX J1804.2+6754 [K95] C
1E 1804.3+6753 KUV 18044+6754 TIC 219107776 AAVSO 1804+67
2E 1804.3+6753 2MASS J18041424+6754123 V* EX Dra Gaia EDR3 2258357545848389888
GSC 04429-01070 PM J18042+6754 [DWS97] Dra 5 Gaia DR2 2258357545848389888

References (121 between 1850 and 2022) (Total 121)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements


V* : 1    distance : 2    PLX : 2    PM : 2   

   

Observing logs


IUE : 3   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* EX Dra

Link by name to the catalogue in VizieR :

2E 4012 GSC 04429-01070 2MASS J18041424+6754123 V* EX Dra Gaia EDR3 2258357545848389888
Gaia DR2 2258357545848389888

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

Currently no annotations available

add an annotation to this object

report an error concerning the data of this object

To bookmark this query, right click on this link: simbad:objects in 1997A&A...327..173F and select 'bookmark this link' or equivalent in the popup menu

2022.05.24-07:14:03

© Université de Strasbourg/CNRS

    • Contact