Pipe3D stellar and gaseous velocity dispersions for CALIFA Galaxies

Colleen Gilhuly, Stéphane Courteau, Sebastian F. Sánchez

Resultado de la investigación: Contribución a una revistaArtículo

Resumen

We present tables of velocity dispersions derived from CALIFA V1200 datacubes using PIPE3D. Four different dispersions are extracted from emission (ionized gas) or absorption (stellar) spectra,with two spatial apertures (5 and 30 arcsec). Stellar and ionized gas dispersions are not interchangeable and we determine their distinguishing features.We also compare these dispersions with literature values and construct sample scaling relations to further assess their applicability. We consider revised velocity-based scaling relations using the virial velocity parameter SK 2 = KVrot 2 + σ2 constructed with each of our dispersions. Our search for the strongest linear correlation between SK and i-band absolute magnitudes favours the common K ~ 0.5, though the range 0.3-0.8 is statistically acceptable. The reduction of scatter in our best stellar mass-virial velocity relations over that of a classic luminosity-velocity relation is minimal; this may however reflect the dominance of massive spirals in our sample.

Idioma originalInglés
Páginas (desde-hasta)1427-1434
Número de páginas8
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen482
N.º2
DOI
EstadoPublicada - 11 ene 2019

Huella dactilar

galaxies
ionized gases
stellar spectra
scaling
absorption spectrum
stellar mass
gas
apertures
luminosity
absorption spectra
gases

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abstract = "We present tables of velocity dispersions derived from CALIFA V1200 datacubes using PIPE3D. Four different dispersions are extracted from emission (ionized gas) or absorption (stellar) spectra,with two spatial apertures (5 and 30 arcsec). Stellar and ionized gas dispersions are not interchangeable and we determine their distinguishing features.We also compare these dispersions with literature values and construct sample scaling relations to further assess their applicability. We consider revised velocity-based scaling relations using the virial velocity parameter SK 2 = KVrot 2 + σ2 constructed with each of our dispersions. Our search for the strongest linear correlation between SK and i-band absolute magnitudes favours the common K ~ 0.5, though the range 0.3-0.8 is statistically acceptable. The reduction of scatter in our best stellar mass-virial velocity relations over that of a classic luminosity-velocity relation is minimal; this may however reflect the dominance of massive spirals in our sample.",
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Pipe3D stellar and gaseous velocity dispersions for CALIFA Galaxies. / Gilhuly, Colleen; Courteau, Stéphane; Sánchez, Sebastian F.

En: Monthly Notices of the Royal Astronomical Society, Vol. 482, N.º 2, 11.01.2019, p. 1427-1434.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Pipe3D stellar and gaseous velocity dispersions for CALIFA Galaxies

AU - Gilhuly, Colleen

AU - Courteau, Stéphane

AU - Sánchez, Sebastian F.

PY - 2019/1/11

Y1 - 2019/1/11

N2 - We present tables of velocity dispersions derived from CALIFA V1200 datacubes using PIPE3D. Four different dispersions are extracted from emission (ionized gas) or absorption (stellar) spectra,with two spatial apertures (5 and 30 arcsec). Stellar and ionized gas dispersions are not interchangeable and we determine their distinguishing features.We also compare these dispersions with literature values and construct sample scaling relations to further assess their applicability. We consider revised velocity-based scaling relations using the virial velocity parameter SK 2 = KVrot 2 + σ2 constructed with each of our dispersions. Our search for the strongest linear correlation between SK and i-band absolute magnitudes favours the common K ~ 0.5, though the range 0.3-0.8 is statistically acceptable. The reduction of scatter in our best stellar mass-virial velocity relations over that of a classic luminosity-velocity relation is minimal; this may however reflect the dominance of massive spirals in our sample.

AB - We present tables of velocity dispersions derived from CALIFA V1200 datacubes using PIPE3D. Four different dispersions are extracted from emission (ionized gas) or absorption (stellar) spectra,with two spatial apertures (5 and 30 arcsec). Stellar and ionized gas dispersions are not interchangeable and we determine their distinguishing features.We also compare these dispersions with literature values and construct sample scaling relations to further assess their applicability. We consider revised velocity-based scaling relations using the virial velocity parameter SK 2 = KVrot 2 + σ2 constructed with each of our dispersions. Our search for the strongest linear correlation between SK and i-band absolute magnitudes favours the common K ~ 0.5, though the range 0.3-0.8 is statistically acceptable. The reduction of scatter in our best stellar mass-virial velocity relations over that of a classic luminosity-velocity relation is minimal; this may however reflect the dominance of massive spirals in our sample.

KW - CD

KW - Galaxies: elliptical and lenticular

KW - Galaxies: kinematics and dynamics

KW - Galaxies: spiral

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U2 - 10.1093/mnras/sty2792

DO - 10.1093/mnras/sty2792

M3 - Artículo

AN - SCOPUS:85057174101

VL - 482

SP - 1427

EP - 1434

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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