2004A&A...413..959B


Query : 2004A&A...413..959B

2004A&A...413..959B - Astronomy and Astrophysics, volume 413, 959-979 (2004/1-3)

Inference of hot star density stream properties from data on rotationally recurrent DACs.

BROWN J.C., BARRETT R.K., OSKINOVA L.M., OWOCKI S.P., HAMANN W.-R., DE JONG J.A., KAPER L. and HENRICHS H.F.

Abstract (from CDS):

The information content of data on rotationally periodic recurrent discrete absorption components (DACs) in hot star wind emission lines is discussed. The data comprise optical depths τ(w,φ) as a function of dimensionless Doppler velocity w=(Δλ/λ0)(c/v) and of time expressed in terms of stellar rotation angle φ. This is used to study the spatial distributions of density, radial and rotational velocities, and ionisation structures of the corotating wind streams to which recurrent DACs are conventionally attributed. The simplifying assumptions made to reduce the degrees of freedom in such structure distribution functions to match those in the DAC data are discussed and the problem then posed in terms of a bivariate relationship between τ(w,φ) and the radial velocity vr(r), transverse rotation rate Ω(r) and density ρ(r,φ) structures of the streams. The discussion applies to cases where: the streams are equatorial; the system is seen edge on; the ionisation structure is approximated as uniform; the radial and transverse velocities are taken to be functions only of radial distance but the stream density is allowed to vary with azimuth. The last kinematic assumption essentially ignores the dynamical feedback of density on velocity and the relationship of this to fully dynamical models is discussed. The case of narrow streams is first considered, noting the result of Hamann et al. (2001A&A...378..946H) that the apparent acceleration of a narrow stream DAC is higher than the acceleration of the matter itself, so that the apparent slow acceleration of DACs cannot be attributed to the slowness of stellar rotation. Thus DACs either involve matter which accelerates slower than the general wind flow, or they are formed by structures which are not advected with the matter flow but propagate upstream (such as Abbott waves). It is then shown how, in the kinematic model approximation, the radial speed of the absorbing matter can be found by inversion of the apparent acceleration of the narrow DAC, for a given rotation law. The case of broad streams is more complex but also more informative. The observed τ(w,φ) is governed not only by vr(r) and Ω(r) of the absorbing stream matter but also by the density profile across the stream, determined by the azimuthal (φ0) distribution function F00) of mass loss rate around the stellar equator. When F00) is fairly wide in φ0, the acceleration of the DAC peak τ(w,φ) in w is generally slow compared with that of a narrow stream DAC and the information on vr(r), Ω(r) and F00) is convoluted in the data τ(w,φ). We show that it is possible, in this kinematic model, to recover by inversion, complete information on all three distribution functions vr(r), Ω(r) and F00) from data on τ(w,φ) of sufficiently high precision and resolution since vr(r) and Ω(r) occur in combination rather than independently in the equations. This is demonstrated for simulated data, including noise effects, and is discussed in relation to real data and to fully hydrodynamic models.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: winds, outflows - stars: mass-loss - 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 - 2022
#notes
1 * J Pup * 07 53 18.1579197 -48 06 10.563676 3.11 4.10 4.24 4.26 4.38 B0.5Ib 227 0

Query : 2004A&A...413..959B

Basic data :
* J Pup -- 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:
* (1971PW&SO,HD,...), IR (AKARI,IRAS,...), UV (CEL,EUVE,...), X (1RXS)
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 53 18.1579197 -48 06 10.563676 (Optical) [ 0.09 0.09 90 ] A 2007A&A...474..653V
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 51 49.9810469 -47 58 18.092217 [ 0.09 0.09 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) :
262.0568819103 -10.4233609366 [ 0.09 0.09 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 :
-5.60 5.76 [0.10 0.09 90] A 2007A&A...474..653V
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) 41.00 [4.1] / z(~) 0.000137 [0.000014] / cz 41.00 [4.10]
   C 2006AstL...32..759G
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):
1.97 [0.10] A 2007A&A...474..653V
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:
B0.5Ib C 2015A&A...580A..59R
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) :
U 3.11 [~] C 2002yCat.2237....0D
B 4.10 [~] C 2002yCat.2237....0D
V 4.24 [~] C 2002yCat.2237....0D
R 4.26 [~] C 2002yCat.2237....0D
G 4.1462 [0.0047] C 2018yCat.1345....0G
I 4.38 [~] C 2002yCat.2237....0D
J 4.56 [~] C 2002yCat.2237....0D
H 4.61 [~] C 2002yCat.2237....0D
K 4.67 [~] C 2002yCat.2237....0D
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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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (37) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 64760 GCRV 5258 PPM 312271 UCAC4 210-016534
* J Pup GEN# +1.00064760 ROT 1272 uvby98 100064760
AKARI-IRC-V1 J0753181-480610 GSC 08139-04578 1RXS J075318.0-480609 WEB 7570
ALS 850 HIC 38518 SAO 219111 WISEA J075318.17-480610.4
CD-47 3396 HIP 38518 SKY# 14689 WISE J075318.14-480610.5
CEL 2083 HR 3090 TD1 11329 [B10] 2095
CPC 0 4996 IRAS 07517-4758 TIC 269064487 Gaia DR2 5518235833732209536
CPD-47 1644 JP11 1612 TYC 8139-4578-1
EUVE J0753-48.1 LS 850 UBV 7643
GC 10689 2MASS J07531817-4806104 UBV M 13789

References (227 between 1850 and 2022) (Total 227)
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 : 4    ROT : 2    PLX : 3    PM : 4    MK : 5   

   

Observing logs


IUE : 17    XMM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * J Pup

Link by name to the catalogue in VizieR :

HD 64760 AKARI-IRC-V1 J0753181-480610 ALS 850 CD-47 3396 CEL 2083
CPD-47 1644 EUVE J0753-48.1 GSC 08139-04578 HIC 38518 HIP 38518
HR 3090 IRAS 07517-4758 LS 850 2MASS J07531817-4806104 PPM 312271
1RXS J075318.0-480609 SAO 219111 TD1 11329 TYC 8139-4578-1 UCAC4 210-016534
uvby98 100064760 WISEA J075318.17-480610.4 WISE J075318.14-480610.5 Gaia DR2 5518235833732209536

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2022.05.19-23:28:01

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