2012A&A...548A..13B

Query : 2012A&A...548A..13B

2012A&A...548A..13B - Astronomy and Astrophysics, volume 548A, 13-13 (2012/12-1)

The galactic unclassified B[e] star HD 50138. III. The short-term line profile variability of its photospheric lines.

BORGES FERNANDES M., KRAUS M., NICKELER D.H., DE CAT P., LAMPENS P., PEREIRA C.B. and OKSALA M.E.

Abstract (from CDS):

HD50138 presents the B[e] phenomenon, but its nature is not clear yet. This star is known to present spectral variations, which have been associated with outbursts and shell phases. We analyze the line profile variability of HD50138 and its possible origin, which provide possible hints to its evolutionary stage, so far said to be close to the end of (or slightly beyond) the main sequence. New high-resolution spectra of HD50138 obtained with the HERMES spectrograph over several nights (five of them consecutively) were analyzed, allowing us to confirm short-term line profile variability. Our new data show short-term variations in the photospheric lines. On the other hand, purely circumstellar lines (such as [Oi] lines) do not show such rapid variability. The rotational velocity of HD 50138, sigmarot=90.3±4.3km/s, and the rotation period, P=3.64±1.16d, were derived from the HeIλ4026 photospheric line. Based on the moment method, we confirm that the origin of this short-term line profile variability is not stellar spots, and it may be caused by pulsations. In addition, we show that macroturbulence may affect the profiles of photospheric lines, as is seen for B supergiants. The location of HD50138 at the end of (or slightly beyond) the main sequence, the newly detected presence of line profile variability resembling pulsating stars, and macroturbulence make this star a fascinating object.

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - stars: mass-loss - stars: winds, outflows - circumstellar matter - stars: individual: HD50138

VizieR on-line data: <Available at CDS (J/A+A/548/A13): list.dat sp/*>

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 - 2024 		#notes
1 HD 50138 Ae* 06 51 33.3989823840 -06 57 59.450772852 6.28 6.68 6.67     A1Ib/II 220 0

Query : 2012A&A...548A..13B

Basic data :
HD 50138 -- Herbig Ae/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: 		* (HD,ALS,...), V* (V*,AAVSO), Ae* (2014MNRAS), Em* (EM*), UV (TD1), NIR (2MASS), IR (IRAS)
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) : 		06 51 33.3989823840 -06 57 59.450772852 (Optical) [ 0.0352 0.0382 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) : 		06 49 07.6086116850 -06 54 21.319976042 [ 0.0352 0.0382 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) : 		219.1517633045930 -03.1441503310724 [ 0.0352 0.0382 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 : 		-3.678 4.178 [0.041 0.039 90] A 2020yCat.1350....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) 793.999023 [3.06084] / z(spectroscopic) 0.002652 [0.000010] / cz 795.05 [3.06]
   (NIR) C 2020AJ....160..120J
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): 		2.8487 [0.0459] A 2020yCat.1350....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: 		A1Ib/II C 1999MSS...C05....0H
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 (7) :
U 6.28 [~] C 2002yCat.2237....0D
B 6.68 [~] C 2002yCat.2237....0D
V 6.67 [~] C 2002yCat.2237....0D
G 6.550996 [0.003268] C 2020yCat.1350....0G
J 5.856 [0.027] C 2003yCat.2246....0C
H 5.093 [0.029] C 2003yCat.2246....0C
K 4.147 [0.021] 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
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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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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (33) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 50138 GSC 04812-04891 SKY# 12129 YZ 96 2206
AKARI-FIS-V1 J0651333-065751 HERZ 799 TD1 8344 [JE82] 247
ALS 19600 HIC 32923 TIC 123545883 AAVSO 0646-06
AP J06513340-0657592 HIP 32923 TYC 4812-4891-1 Gaia DR3 3099471086259621888
BD-06 1775 IRAS 06491-0654 UBV M 12519 Gaia DR1 3099471086259621888
EM* MWC 158 JP11 1444 UCAC3 167-47115 Gaia DR2 3099471086259621888
GC 8983 2MASS J06513340-0657592 uvby98 100050138
GCRV 4476 PPM 189615 V* V743 Mon
GEN# +1.00050138 SAO 133781 WEB 6628

References (220 between 1850 and 2024) (Total 220)
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    distance : 2    ROT : 1    Fe_H : 1    PLX : 5    PM : 5    MK : 2   

   

Observing logs


herschel : 4    IUE : 52   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : HD 50138

Link by name to the catalogue in VizieR :

HD 50138 AKARI-FIS-V1 J0651333-065751 ALS 19600 AP J06513340-0657592 BD-06 1775
GSC 04812-04891 HIC 32923 HIP 32923 IRAS 06491-0654 2MASS J06513340-0657592
PPM 189615 SAO 133781 TD1 8344 TYC 4812-4891-1 UCAC3 167-47115
uvby98 100050138 V* V743 Mon Gaia DR3 3099471086259621888 Gaia DR1 3099471086259621888 Gaia DR2 3099471086259621888

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