23 research outputs found
The Galactic Chemical Evolution of phosphorus observed with IGRINS
Phosphorus (P) is considered to be one of the key elements for life, making
it an important element to look for in the abundance analysis of spectra of
stellar systems. Yet, there exists only a handful of spectroscopic studies to
estimate the P abundances and investigate its trend across a range of
metallicities. We have observed full HK band spectra at a spectral resolving
power of R=45,000 with IGRINS instrument. Abundances are determined using SME
in combination with 1D MARCS stellar atmosphere models. The investigated sample
of stars have reliable stellar parameters estimated using optical FIES spectra
(GILD; J\"onsson et al. in prep.). In order to determine the P abundances from
the 16482.92 Angstrom P line, we take special care of the CO() blend.
We determine the C, N, O abundances from atomic carbon and a range of
non-blended molecular lines (CO, CN, OH) which are aplenty in the H band region
of K giant stars, assuring an appropriate modelling of the blending
CO() line. We present [P/Fe] vs [Fe/H] trend for 38 K giant stars in
the metallicity range of -1.2 dex [Fe/H] 0.4 dex. We find that our
trend matches well with the compiled literature sample of prominently dwarf
stars and limited number of giant stars. Our trend is found to be higher by
0.05 - 0.1 dex compared to the theoretical chemical evolution trend in
Cescutti et al. 2012 resulting from core collapse supernova (type II) of
massive stars with the P yields from Kobayashi et al. (2006) arbitrarily
increased by a factor of 2.75. Thus the enhancement factor might need to be
0.05 - 0.1 dex higher to match our trend. We also find an empirically
determined primary behaviour for phosphorus. Furthermore, the phosphorus
abundance is found to be elevated by 0.6 - 0.9 dex in two metal poor
s-enriched stars compared to the theoretical chemical evolution trend.Comment: 13 pages, 9 figures, accepted for publication in Astronomy and
Astrophysic
Line strengths and gradients in S0 galaxies
VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'Line strengths and line strength gradients in S0 galaxies' (bibcode: 1996ApJ...459..110F
UltraVISTA Catalogue Release DR1
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'UltraVISTA: a new ultra-deep near-infrared survey in COSMOS.' (bibcode: 2012A&A...544A.156M
ALMA maps of G17.64+0.16
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Chasing discs around O-type (proto)stars: ALMA evidence for an SiO disc and disc wind from G17.64+0.16.' (bibcode: 2018A&A...620A..31M
The COSMOS2015 catalog
VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'The COSMOS2015 catalog: exploring the
Fornax Deep Survey (FDS) r' band HiPS
The Fornax Deep Survey (FDS) Survey is an imaging survey in 4 bands,using the wide-field imager OmegaCAM mounted on the VST in the SDSS u', g', r', and i'-bands of about 30 degrees² covering the Fornax Galaxy Cluster and the infalling Fornax A Group down to a surface brightness limit of ~28 mag/arcsec² (1-sigma surface brightness over a 1 arcsecond² area). FDS is a joint project that used the VST-GTO time of NOVA (previously called FOCUS - PI: R. F. Peletier) and INAF (as part of VEGAS - PIs: M. Capaccioli and E. Iodice)
Fornax Deep Survey (FDS) u' band HiPS
The Fornax Deep Survey (FDS) Survey is an imaging survey in 4 bands,using the wide-field imager OmegaCAM mounted on the VST in the SDSS u', g', r', and i'-bands of about 30 degrees² covering the Fornax Galaxy Cluster and the infalling Fornax A Group down to a surface brightness limit of ~28 mag/arcsec² (1-sigma surface brightness over a 1 arcsecond² area). FDS is a joint project that used the VST-GTO time of NOVA (previously called FOCUS - PI: R. F. Peletier) and INAF (as part of VEGAS - PIs: M. Capaccioli and E. Iodice)
280 one-opposition near Earth asteroids
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title '280 one-opposition near Earth asteroids recovered by the EURONEAR with the Isaac Newton Telescope.' (bibcode: 2018A&A...609A.105V
S abundances for 1301 stars from GES
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'The Gaia-ESO Survey: Galactic evolution of sulphur and zinc.' (bibcode: 2017A&A...604A.128D