HR 6060: The Closest Ever Solar Twin?

Mello, G. F. Porto de; Silva, L. da

doi:10.1086/310693

Cited by 116 publications

(62 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HD 84117 is deficient in Mn and enriched in Na and in elements of the s-process (Sr, Y, Zr, and Ba). HD 146233, proposed by Porto de Mello & da Silva (1997b) as the closest solar twin ever known at that time, is actually (as also proposed by these authors) enriched in some elements of the s-process (Sr and Ba) and possibly enriched in Sc, V, and Sm. Thus, possibly, the investigation of a larger sample of stars at a similar level of detail as done here could reveal that non-solar abundance ratios are present even for stars sharing the same place and time of birth.…”

Section: Elemental Abundancesmentioning

confidence: 54%

Accurate and homogeneous abundance patterns in solar-type stars of the solar neighbourhood: a chemo-chronological analysis

Silva

Mello

Milone

et al. 2012

A&A

Self Cite

View full text Add to dashboard Cite

Aims. We report the derivation of abundances of C, Na, Mg, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd, and Sm in a sample of 25 solar-type stars of the solar neighbourhood, correlating the abundances with the stellar ages, kinematics, and orbital parameters. Methods. The spectroscopic analysis, based on data of high resolution and high signal-to-noise ratio, was differential to the Sun and applied to atomic line equivalent widths supplemented by the spectral synthesis of C and C 2 features. We also performed a statistical study by using the method of tree clustering analysis, searching for groups of stars sharing similar elemental abundance patterns. We derived the stellar parameters from various criteria, with average errors of 30 K, 0.13 dex, and 0.05 dex, respectively, for T eff , log g, and [Fe/H]. The average error of the [X/Fe] abundance ratios is 0.06 dex. Ages were derived from theoretical HR diagrams and membership of the stars in known kinematical moving groups.

show abstract

Section: Elemental Abundancesmentioning

confidence: 54%

Accurate and homogeneous abundance patterns in solar-type stars of the solar neighbourhood: a chemo-chronological analysis

Silva

Mello

Milone

et al. 2012

A&A

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, as noted above, the bulk of synoptic observations so far have been designed to elucidate the broad behavior of cool stars, many of which are quite different from the Sun. Even 18 Sco itself is probably slightly younger than the Sun, rotates more rapidly, and has a dissimilar Li abundance (Porto de Mello & da Silva 1997;Meléndez & Ramírez 2007). These considerations and the 18 Sco photometric result force us to reconsider what we require of a "solar analog" and what observational requirements are in effect if we wish to use the stars as reliable proxies for past solar behavior.…”

Section: Solar Twins and 18 Scorpiimentioning

confidence: 99%

The Activity and Variability of the Sun and Sun-Like Stars. Ii. Contemporaneous Photometry and Spectroscopy of Bright Solar Analogs

Hall

Henry²,

Lockwood

et al. 2009

The Astronomical Journal

135

150

View full text Add to dashboard Cite

We present 14 years of contemporaneous photometric and spectroscopic observations of 28 solar analog stars, taken with the Tennessee State University Automatic Photometric Telescopes at Fairborn Observatory and the Solar-Stellar Spectrograph at Lowell Observatory. These are the best observed and most nearly Sun-like of the targets in our magnitude-limited (V 7.5) sample. The correlations between luminosity and activity reveal the expected inverse activity-brightness correlations for active stars. Strong direct correlations between activity and brightness are not prevalent for the less active solar age stars, but are precision limited. The Sun does not appear to have unusually low photometric variability when compared with the most Sun-like inactive solar analogs. We present evidence that the activity index R HK is not a good discriminant of Maunder Minimum candidate stars. On the basis of a star that appears to have transitioned from a low-variability state to a cycling state, we investigate the regime in which stars might switch from faculae-dominated to spot-dominated variations.

show abstract

“…It takes a while for the most complex molecules to form; they condense onto grains in a predictable order and finally are photodissociated and blown away . Thus one can assign specific ages to specific clouds (Bergin & Langer 1997;Pratap et al 1997). She continues to wish that somebody could manage to make the number of carbon atoms seen in different phases of the interstellar medium come out even (Greenberg 1974;Li & Greenberg 1997;Dwek 1997;Mathis 1996).…”

Section: The Milky Waymentioning

confidence: 99%

Astrophysics in 1997

Trimble¹,

McFadden²

1998

PUBL ASTRON SOC PAC

View full text Add to dashboard Cite

ABSTRACT. Martian marvels, a gamma-ray burster with a redshift, Galileo converses with Ganymede, a record galactic redshift of 4.92, and much else. Fiscal 1997 was definitely an exciting year for astronomers. We have tried hard to hit all the obvious highlights, but also to report more gradual progress on traditional problems of understanding planets, stars, galaxies, and the universe. Though the year was saddened by the loss of many valued colleagues, we nevertheless indulge in occasional soupçons of frivolity.

show abstract

HR 6060: The Closest Ever Solar Twin?

Cited by 116 publications

References 12 publications

Accurate and homogeneous abundance patterns in solar-type stars of the solar neighbourhood: a chemo-chronological analysis

Accurate and homogeneous abundance patterns in solar-type stars of the solar neighbourhood: a chemo-chronological analysis

The Activity and Variability of the Sun and Sun-Like Stars. Ii. Contemporaneous Photometry and Spectroscopy of Bright Solar Analogs

Astrophysics in 1997

Contact Info

Product

Resources

About