2021RNAAS...5..258K

Query : 2021RNAAS...5..258K

2021RNAAS...5..258K - Research Notes of the AAS, 5, 258 (2021/November-0)

TESS Detection of Rotation in the A1V Star α Lacertae.

KAWALER S.D.

Abstract (from CDS):

The A1V star α Lacertae was observed by TESS in 2019 September and October. The short-cadence photometry reveals periodic variation at the 24.6 ppm level. The 0.708 day variation is consistent with rotational modulation seen in main sequence A stars, and implies an equatorial rotation velocity of 153 km s–1. With prior spectroscopic measurement of the rotational broadening of 128 km s–1, this indicates an inclination of the rotation axis of 57°. The first harmonic of this period is present in the data, along with a two non-commensurate periods of 0.763 and 0.257 day, suggesting spot modulation with different periods, perhaps indicating differential rotation with latitude. Follow-up spectroscopy and photometry of this bright (V = 3.77) star can place valuable constraints on differential rotation and spot formation and evolution in A stars.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): A stars - Stellar rotation - Starspots

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 - 2026 		#notes
1 * alf Lac PM* 22 31 17.5014213452 +50 16 56.969913082 3.78 3.78 3.77 3.77 3.80 A1V 270 0

Query : 2021RNAAS...5..258K

Basic data :
* alf Lac -- High Proper Motion Star
Other object types: otypes_help 		* (*,AG,...), ** (ADS,CCDM,...), UV (CEL,TD1), PM* (2007A&A), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		22 31 17.5014213452 +50 16 56.969913082 (Optical) [ 0.1385 0.1465 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 29 13.5657299254 +50 01 29.915303198 [ 0.1385 0.1465 90 ]
Gal coord. (ep=J2000) : 		101.2596668115703 -06.5980241916989 [ 0.1385 0.1465 90 ]
Proper motions mas/yr : 		137.243 17.540 [0.223 0.189 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -12.66 [0.33] / z(spectroscopic) -0.000042 [0.000001] / cz -12.66 [0.33]
   (Opt) A 2022yCat.1355....0G
Parallaxes (mas): 		31.4943 [0.2017] A 2020yCat.1350....0G
Spectral type: 		A1V C ~
Fluxes (9) :
U 3.78 [~] C 2002yCat.2237....0D
B 3.78 [~] C 2002yCat.2237....0D
V 3.77 [~] C 2002yCat.2237....0D
R 3.77 [~] C 2002yCat.2237....0D
G 3.783707 [0.003284] C 2022yCat.1355....0G
I 3.80 [~] C 2002yCat.2237....0D
J 3.75 [~] C 2002yCat.2237....0D
H 3.867 [0.208] D 2003yCat.2246....0C
K 3.75 [~] C 2002yCat.2237....0D
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (43) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* alf Lac GCRV 14154 2MASS J22311751+5016571 TIC 468816607
* 7 Lac GEN# +1.00213558 N30 4963 TYC 3628-3193-1
ADS 16021 A GSC 03628-03193 NAME-IAU Stellio UBV 19265
AG+50 1825 HD 213558 PLX 5449 UBV M 26455
AKARI-IRC-V1 J2231175+501657 HGAM 1070 PLX 5449.00 uvby98 100213558
BD+49 3875 HIC 111169 PMC 90-93 595 WDS J22313+5017A
CCDM J22313+5017A HIP 111169 PPM 40777 WEB 19894
CEL 5482 HR 8585 ROT 3281 [R57] 1109
CSI+49 3875 1 IDS 22272+4946 A SAO 34542 Gaia DR3 1988193348344678656
FK5 848 IRAS 22292+5001 SKY# 42852 Gaia DR2 1988193348339562880
GC 31471 JP11 3504 TD1 29152

References (270 between 1850 and 2026) (Total 270)
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 Description of Measurements

Velocities : 7    Distance : 2    Rot : 7    Fe/H : 7    Plx : 5    PM : 7    SpT : 6   

   

Observing logs
ISO : 4    IUE : 2   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * alf Lac

Link by name to the catalogue in VizieR :

AG+50 1825 AKARI-IRC-V1 J2231175+501657 BD+49 3875 CCDM J22313+5017A CEL 5482
FK5 848 GSC 03628-03193 HD 213558 HIC 111169 HIP 111169
HR 8585 IRAS 22292+5001 2MASS J22311751+5016571 PLX 5449 PPM 40777
SAO 34542 TD1 29152 TYC 3628-3193-1 uvby98 100213558 WDS J22313+5017A
Gaia DR3 1988193348344678656 Gaia DR2 1988193348339562880

Search by coordinates in Vizier (radius: 5 arcsec)

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 .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2021RNAAS...5..258K and select 'bookmark this link' or equivalent in the popup menu