2001A&A...367..532S


Query : 2001A&A...367..532S

2001A&A...367..532S - Astronomy and Astrophysics, volume 367, 532-548 (2001/2-4)

Near-IR and visible interferometry of Be stars: constraints from wind models.

STEE P. and BITTAR J.

Abstract (from CDS):

We report theoretical HI visible and near-IR line profiles, i.e. H α (6562Å), H β (4861Å) and Br γ (21656Å), and intensity maps for a large set of parameters (density, temperature, envelope geometry, inclination angle), representative of early to late Be spectral types. We have computed the size of the emitting region in the Br γ line and its nearby continuum which both originate from a very extended region, i.e. at least 40 stellar radii which is twice the size of the H α emitting region. We predict the relative fluxes from the central star, the envelope contribution in the given lines and in the continuum for a wide range of parameters characterizing the disk models. For a density ρ=5x10–13g/cm3 at the base of the stellar photosphere, we obtain the largest probability of HI IR lines in emission, which is a factor of 100 lower than typical values found for Be stars. We have also studied the effect of changing the spectral type on our results and we obtain a clear correlation between the luminosity in H α and in the infrared. We found that for a density ρ=5x10–12g/cm3, the probability of detecting HI IR lines in emission must be stronger for late-B spectral type stars. If no IR lines are detected for late types, it may indicate that the density in the disc is very high ( ∼10–11g/cm3). On the other hand, we found that around ρ=5x10–13g/cm3, it is possible to have a large envelope contribution in the Br γ line and a similar or even smaller emission in the Balmer lines. Even if Br γ is formed in an extended region, it is possible to obtain a FWHM and a V/R that agree well with observed profiles. Finally, it seems that the contribution in the Br γ line increases when the envelope becomes more and more ``disk-like'', contrary to the H α and H β lines.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - emission line - Be - infrared: stars - winds: models - techniques: interferometric

Simbad objects: 1

goto Full paper

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 - 2021
#notes
1 * gam Cas Be* 00 56 42.5317 +60 43 00.265 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1156 2

    Equat.    Gal    SGal    Ecl

Query : 2001A&A...367..532S

Basic data :
* gam Cas -- Be 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:
Be* (), * (2013ApJS,*,...), X (3A,AT,...), ** (**,ADS,...), IR (IRAS,IRC,...), Em* (EM*,[KW97]), V* (V*,AAVSO), UV (EUVE,TD1), gam (INTREF)
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) :
00 56 42.5317 +60 43 00.265 [ 4.25 3.32 137 ] A 1997A&A...323L..49P
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) :
00 53 40.3431 +60 26 47.401 [ 4.25 3.32 137 ]
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) :
123.5768772 -02.1484065 [ 4.25 3.32 137 ]
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 :
25.65 -3.82 [0.48 0.37 139] A 1997A&A...323L..49P
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) -6.8 [0.9] / z(~) -0.000023 [0.000003] / cz -6.80 [0.90]
   E 1953GCRV..C......0W
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):
5.32 [0.56] A 1997A&A...323L..49P
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:
B0.5IVpe C 2011ARep...55...31S
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 (8) :
U 1.18 [~] C 2002yCat.2237....0D
B 2.29 [~] C 2002yCat.2237....0D
V 2.39 [~] C 2002yCat.2237....0D
R 2.32 [~] C 2002yCat.2237....0D
I 2.40 [~] C 2002yCat.2237....0D
J 2.36 [~] C 2002yCat.2237....0D
H 2.22 [~] C 2002yCat.2237....0D
K 2.11 [~] 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
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
Some important notes on this object about identifications and objects associations.
notes:

  • is the star of the reflection nebula VDB 5.


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (67) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* gam Cas GC 1117 N30 187 4U 0054+60
* 27 Cas GCRV 526 PBC J0056.5+6043 UBV 833
** BU 499A GEN# +1.00005394 PLX 185 uvby98 100005394 A
** BU 1028A 1H 0053+604 PLX 185.00 V* gam Cas
3A 0053+604 HD 5394 PMC 90-93 23 VDB 5
ADS 782 A HIC 4427 PMSC 00507+6010A WDS J00567+6043A
AG+60 106 HIP 4427 PPM 12597 WEB 791
ALS 6407 HR 264 RAFGL 133 1XRS 00537+604
AT 0037+611 INTREF 57 1RXS J005642.0+604300 [BM83] X0053+604
BD+59 144 IRAS 00536+6026 2S 0053+604 [FS2003] 0031
BSD 8-901 IRC +60031 SAO 11482 [HFE83] 40
CCDM J00567+6043A JP11 439 SKY# 1444 [JE82] 20
CSI+59 144 1 LS I +60 133 SWIFT J0056.7+6043 [KRL2007b] 9
EM* MWC 9 1M 0050+592 SWIFT J0056.5+6042 [KW97] 4-31
1ES 0053+60.4 1M 0050+60 TD1 521 AAVSO 0050+60
EUVE J0056+60.7 2MASS J00564251+6043002 TIC 51962733 Gaia DR2 426558460877467776
FK5 32 MCW 46 TYC 4017-2319-1

References (1156 between 1850 and 2021) (Total 1156)
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


velocities : 21    distance : 2    ROT : 1    Fe_H : 2    PLX : 3    PM : 4    MK : 16   

   

Observing logs


ISO : 10    IUE : 162    XMM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * gam Cas

Link by name to the catalogue in VizieR :

AG+60 106 ALS 6407 BD+59 144 CCDM J00567+6043A EUVE J0056+60.7
FK5 32 HD 5394 HIC 4427 HIP 4427 HR 264
IRAS 00536+6026 IRC +60031 LS I +60 133 2MASS J00564251+6043002 PLX 185
PPM 12597 RAFGL 133 1RXS J005642.0+604300 SAO 11482 TD1 521
TYC 4017-2319-1 uvby98 100005394 A V* gam Cas VDB 5 WDS J00567+6043A
Gaia DR2 426558460877467776

Search by coordinates in Vizier (radius: 5 arcsec)


Indications mainly about references on other documents
Notes (1) :


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 .

display existing annotations (1)

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 2001A&A...367..532S and select 'bookmark this link' or equivalent in the popup menu


2021.07.30-01:02:36

© Université de Strasbourg/CNRS

    • Contact