2016A&A...593A..67H


Query : 2016A&A...593A..67H

2016A&A...593A..67H - Astronomy and Astrophysics, volume 593A, 67-67 (2016/9-1)

The gaseous debris disk of the white dwarf SDSS J1228+1040. HST/COS search for far-ultraviolet signatures.

HARTMANN S., NAGEL T., RAUCH T. and WERNER K.

Abstract (from CDS):

Context. Gaseous and dust debris disks around white dwarfs (WDs) are formed from tidally disrupted planetary bodies. This offers an opportunity to determine the composition of exoplanetary material by measuring element abundances in the accreting WD's atmosphere. A more direct way to do this is through spectral analysis of the disks themselves.
Aims. Currently, the number of chemical elements detected through disk emission-lines is smaller than that of species detected through lines in the WD atmospheres. We assess the far-ultraviolet (FUV) spectrum of one well-studied object (SDSS J122859.93+104032.9) to search for disk signatures at wavelengths <1050Å, where the broad absorption lines of the Lyman series effectively block the WD photospheric flux. In addition, we investigate the CaII infrared triplet (IRT) line profiles to constrain disk geometry and composition.
Methods. We performed FUV observations (950-1240Å) with the Hubble Space Telescope/Cosmic Origins Spectrograph and used archival optical spectra. We compared them with non-local thermodynamic equilibrium model spectra.
Results. No disk emission-lines were detected in the FUV spectrum, indicating that the disk effective temperature is Teff~=5000K. The long-time variability of the CaII IRT was reproduced with a precessing disk model of bulk Earth-like composition, having a surface mass density of 0.3g/cm2 and an extension from 55 to 90 WD radii. The disk has a spiral shape that precesses with a period of approximately 37 years, confirming previous results.

Abstract Copyright: © ESO, 2016

Journal keyword(s): accretion, accretion disks - stars: individual: SDSS J122859.93+104032.9 - white dwarfs - planetary systems

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 SDSS J122859.92+104033.0 WD* 12 28 59.9338108888 +10 40 33.043893470           DAZe: 110 0

    Equat.    Gal    SGal    Ecl

Query : 2016A&A...593A..67H

Basic data :
SDSS J122859.92+104033.0 -- White Dwarf
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:
WD* (2006ApJS,WD,...), PM* (2018yCat), * (Gaia), IR (WISE)
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) :
12 28 59.9338108888 +10 40 33.043893470 (Optical) [ 0.0764 0.0549 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) :
12 26 27.8864681956 +10 57 09.106263494 [ 0.0764 0.0549 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) :
284.0633872542885 +72.7204246194673 [ 0.0764 0.0549 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 :
-49.932 -24.596 [0.200 0.135 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) 54 [120] / z(spectroscopic) 0.00018 [0.00040] / cz 54.0 [119.9]
   E 2008ApJS..175..297A
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):
7.8910 [0.0918] A 2018yCat.1345....0G
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:
DAZe: D 2013ApJS..204....5K
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 (9) :
G 16.4331 [0.0020] C 2018yCat.1345....0G
J 16.893 [0.015] C 2011ApJS..197...38D
H 16.84 [0.02] C 2011MNRAS.417.1210G
K 16.424 [0.038] C 2011ApJS..197...38D
u (AB) 16.200 [0.006] C 2015ApJS..219...12A
g (AB) 16.208 [0.004] C 2015ApJS..219...12A
r (AB) 16.599 [0.004] C 2015ApJS..219...12A
i (AB) 16.897 [0.005] C 2015ApJS..219...12A
z (AB) 17.129 [0.011] C 2015ApJS..219...12A
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.
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Identifiers (10) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

WD 1226+110 SDSS J122859.93+104032.9 WD 1226+109 Gaia DR2 3904415787947492096
LAMOST J122859.90+104032.7 SDSS J122859.93+104033.0 WIRED J122859.93+104032.9
SDSS J122859.92+104033.0 SDSS J122859.92+104032.9 WISE J122859.87+104032.8

References (110 between 1850 and 2021) (Total 110)
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 : 2    distance : 4    Fe_H : 7    PLX : 1    PM : 3    MK : 6   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : SDSS J122859.92+104033.0

Link by name to the catalogue in VizieR :

WD 1226+110 SDSS J122859.92+104033.0 SDSS J122859.93+104032.9 SDSS J122859.93+104033.0 SDSS J122859.92+104032.9
WD 1226+109 WISE J122859.87+104032.8 Gaia DR2 3904415787947492096

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2021.07.30-01:05:17

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