2021AJ....162..160N

Query : 2021AJ....162..160N

2021AJ....162..160N - Astron. J., 162, 160-160 (2021/October-0)

Radial-velocity precision of ESPRESSO through the analysis of the solar twin HIP 11915.

NETTO Y., LORENZO-OLIVEIRA D., MELENDEZ J., YANA GALARZA J., HAYWOOD R.D., SPINA L. and DOS SANTOS L.A.

Abstract (from CDS):

Different stellar phenomena affect radial velocities (RVs), causing variations large enough to make it difficult to identify planet signals from the stellar variability. RV variations caused by stellar oscillations and granulation can be reduced through some methods, but the impact of rotationally modulated magnetic activity on RV, due to stellar active regions, is harder to correct. New instrumentation promises an improvement in precision of one order of magnitude, from about 1 m s^–1 to about 10 cm s^–1. In this context, we report our first results from 24 spectroscopic Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations (ESPRESSO)/Very-Large Telescope observations of the solar twin star HIP 11915, spread over 60 nights. We used a Gaussian Process approach and found for HIP 11915 a RV residual rms scatter of about 20 cm s^–1, representing an upper limit for the performance of ESPRESSO.

Journal keyword(s): Radial velocity - Astronomy data analysis

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 - 2026	#notes
1	HD 16008	PM*	02 33 49.0261666392	-19 36 42.502173696		9.24	8.58			G5V	90	0

Query : 2021AJ....162..160N

Basic data :

HD 16008 -- High Proper Motion Star

* (2014A&A,BD,...), PM* (LTT,NLTT), NIR (2MASS)

02 33 49.0261666392 -19 36 42.502173696 (Optical) [ 0.0159 0.0163 90 ] A 2020yCat.1350....0G

02 31 29.2964536958 -19 49 52.463401381 [ 0.0159 0.0163 90 ]

200.6408267795136 -65.3868740706799 [ 0.0159 0.0163 90 ]

220.720 35.513 [0.020 0.020 90] A 2020yCat.1350....0G

V(km/s) 14.508 [0.0007] / z(spectroscopic) 0.000048 [0.000000] / cz 14.51 [0.00] (Opt) A 2018A&A...616A...7S

18.6292 [0.0224] A 2020yCat.1350....0G

G5V C 1988MSS...C04....0H

B 9.24 [0.02] D 2000A&A...355L..27H

V 8.58 [0.01] D 2000A&A...355L..27H

G 8.458304 [0.002760] C 2020yCat.1350....0G

J 7.426 [0.035] C 2003yCat.2246....0C

H 7.137 [0.055] C 2003yCat.2246....0C

K 7.072 [0.020] C 2003yCat.2246....0C

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`LTT 1254`	`HIP 11915`	`TIC 64053723`	`Gaia DR3 5130377231512290816`
`BD-20 481`	`2MASS J02334900-1936425`	`TYC 5862-2032-1`	`Gaia DR1 5130377192857278976`
`CPD-20 285`	`NLTT 8348`	`YZ 0 6818`
`HD 16008`	`PPM 211694`	`YZ 109 678`
`HIC 11915`	`SAO 148468`	`Gaia DR2 5130377231512290816`

References (90 between 1850 and 2026) (Total 90)
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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`BD-20 481`	`CPD-20 285`	`HD 16008`	`HIC 11915`	`HIP 11915`
`2MASS J02334900-1936425`	`NLTT 8348`	`PPM 211694`	`SAO 148468`	`TYC 5862-2032-1`
`Gaia DR2 5130377231512290816`	`Gaia DR3 5130377231512290816`	`Gaia DR1 5130377192857278976`

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