CDS

2002A&A...386..983F

Query : 2002A&A...386..983F

2002A&A...386..983F - Astronomy and Astrophysics, volume 386, 983-993 (2002/5-2)

Acoustic and magnetic wave heating in stars. II. On the range of chromospheric activity.

FAWZY D., ULMSCHNEIDER P., STEPIEN K., MUSIELAK Z.E. and RAMMACHER W.

Abstract (from CDS):

In the first paper of this series we developed a method to construct theoretical, time-dependent and two-component chromosphere models for late-type main sequence stars. The models consist of non-magnetic regions heated by acoustic waves and magnetic flux tube regions heated by magnetic tube waves. By specifying the magnetic filling factor, theoretical models of stellar atmospheres with different chromospheric activity can be calculated. Here, these models are used to simulate the emerging Ca II and Mg II chromospheric emission fluxes and compare them with observations. The comparison shows that the wave heating alone can explain most but not all of the observed range of chromospheric activity. In addition, the results obtained clearly imply that the base of stellar chromospheres is heated by acoustic waves, the heating of the middle and upper chromospheric layers is dominated by magnetic waves associated with magnetic flux tubes, and that other non-wave (e.g., reconnective) heating mechanisms are required to explain the structure of the highest layers of stellar chromospheres.

Abstract Copyright: ∼

Journal keyword(s): methods: numerical - stars: chromospheres - stars: coronae - stars: magnetic fields - MHD - waves

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 - 2023 		#notes
1 V* BX Cet BY* 02 36 15.2668724487 +06 52 17.915599626   13.28   11.405   M3.5V 185 1

Query : 2002A&A...386..983F

Basic data :
V* BX Cet -- BY Dra Variable
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: 		* (2015ApJS,GSC,...), PM* (2013MNRAS,Ci,...), ** (**,CCDM,...), MIR (AKARI,WISEA,...), BY* (2017ARep), V* (V*), NIR (2MASS)
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) : 		02 36 15.2668724487 +06 52 17.915599626 (Optical) [ 0.0356 0.0323 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) : 		02 33 30.5283955364 +06 38 03.266361832 [ 0.0356 0.0323 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) : 		163.4668928142189 -47.5807246001749 [ 0.0356 0.0323 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 : 		1801.671 1450.487 [0.043 0.038 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) 26.268 [0.0017] / z(spectroscopic) 0.000088 [0.000000] / cz 26.27 [0.00]
   (Opt) A 2018A&A...616A...7S
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): 		138.4371 [0.0420] 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: 		M3.5V C 2015A&A...577A.128A
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) :
B 13.28 [~] E ~
R 11.405 [0.04] D 2012yCat.1322....0Z
G 10.333128 [0.002849] C 2020yCat.1350....0G
J 7.333 [0.018] C 2003yCat.2246....0C
H 6.793 [0.038] C 2003yCat.2246....0C
K 6.574 [0.020] C 2003yCat.2246....0C
g 12.412 [0.04] D 2012yCat.1322....0Z
r 11.062 [0.13] E 2012yCat.1322....0Z
i 9.541 [0.09] D 2012yCat.1322....0Z
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!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (40) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GSC 00052-00151 G 73-71 MCC 396 V* BX Cet
** PLQ 32B G 76-12 NLTT 8455 vMa 2-3
AKARI-IRC-V1 J0236161+065228 GJ 105 B 8pc 138.72B WDS J02361+0653C
AP J02361535+0652191 IDS 02307+0626 B PM J02362+0652 WISEA J023616.52+065232.9
CCDM J02361+0653B Karmn J02362+068 PMSC 02307+0626B WISE J023616.50+065233.0
Ci 20 175 LFT 218 TIC 278962913 Zkh 44
CSI+06 398 2 LHS 16 UBV 2587 [R78b] 153
GEN# +1.00016160B LSPM J0236+0652 UCAC4 485-003632 [RHG95] 463
GEN# +1.20016160 LTT 10859 USNO-B1.0 0968-00026146 Gaia DR3 18565464288396416
GEN# +9.80073071 2MASS J02361535+0652191 USNO 802 Gaia DR2 18565464288396416

References (185 between 1850 and 2023) (Total 185)
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 : 6    V* : 1    distance : 2    ROT : 2    Fe_H : 23    PLX : 2    PM : 7    MK : 15   

   

Observing logs


IUE : 2   

   

External archives :

Link by name to the catalogue in VizieR :

GSC 00052-00151 AKARI-IRC-V1 J0236161+065228 AP J02361535+0652191 CCDM J02361+0653B G 73-71
G 76-12 GJ 105 B LHS 16 LSPM J0236+0652 2MASS J02361535+0652191
NLTT 8455 UCAC4 485-003632 USNO-B1.0 0968-00026146 V* BX Cet WDS J02361+0653C
WISEA J023616.52+065232.9 WISE J023616.50+065233.0 Gaia DR3 18565464288396416 Gaia DR2 18565464288396416

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2023.09.23-17:15:42

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