Spiral-like star-forming patterns in CALIFA early-type galaxies

J. M. Gomes; P. Papaderos; J. M. Vílchez; C. Kehrig; J. Iglesias-Páramo; I. Breda; M. D. Lehnert; S. F. Sánchez; B. Ziegler; S. N. Dos Reis; J. Bland-Hawthorn; L. Galbany; D. J. Bomans; F. F. Rosales-Ortega; C. J. Walcher; R. García-Benito; I. Márquez; A. Del Olmo; M. Mollá; R. A. Marino; C. Catalán-Torrecilla; R. M. González Delgado; A. R. López-Sánchez; Califa Collaboration

doi:10.1051/0004-6361/201525974

Spiral-like star-forming patterns in CALIFA early-type galaxies

J. M. Gomes, P. Papaderos, J. M. Vílchez, C. Kehrig, J. Iglesias-Páramo, I. Breda, M. D. Lehnert, S. F. Sánchez, B. Ziegler, S. N. Dos Reis, J. Bland-Hawthorn, L. Galbany, D. J. Bomans, F. F. Rosales-Ortega, C. J. Walcher, R. García-Benito, I. Márquez, A. Del Olmo, M. Mollá, R. A. MarinoC. Catalán-Torrecilla, R. M. González Delgado, A. R. López-Sánchez, Califa Collaboration

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Abstract

Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 <μ_r mag/□″< 26) star-forming spiral-arm-like features in the periphery of three nearby early-type galaxies (ETGs). These features are of considerable interest because they document the still ongoing inside-out growth of some local ETGs and may add valuable observational insight into the origin and evolution of spiral structure in triaxial stellar systems. A characteristic property of the nebular component in the studied ETGs, classified i+, is a two-radial-zone structure, with the inner zone that displays faint (EW(Hα) ≃ 1 Å) low-ionization nuclear emission-line region (LINER) properties, and the outer one (3 Å <EW(Hα)≲ 20 Å) Hii-region characteristics. This spatial segregation of nebular emission in two physically distinct concentric zones calls for an examination of aperture effects in studies of type i+ ETGs with single-fiber spectroscopic data.

Original language	English
Article number	A92
Pages (from-to)	1-6
Number of pages	6
Journal	Astronomy and Astrophysics
Volume	585
DOIs	https://doi.org/10.1051/0004-6361/201525974
Publication status	Published - 1 Jan 2016

Keywords

Galaxies: elliptical and lenticular, cD
Galaxies: ISM
Galaxies: kinematics and dynamics
Galaxies: nuclei
Galaxies: star formation

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10.1051/0004-6361/201525974

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Gomes, J. M., Papaderos, P., Vílchez, J. M., Kehrig, C., Iglesias-Páramo, J., Breda, I., Lehnert, M. D., Sánchez, S. F., Ziegler, B., Dos Reis, S. N., Bland-Hawthorn, J., Galbany, L., Bomans, D. J., Rosales-Ortega, F. F., Walcher, C. J., García-Benito, R., Márquez, I., Del Olmo, A., Mollá, M., ... Collaboration, C. (2016). Spiral-like star-forming patterns in CALIFA early-type galaxies. Astronomy and Astrophysics, 585, 1-6. Article A92. https://doi.org/10.1051/0004-6361/201525974

@article{0b6054898b0e4c6aacfcc9b36d2cdb6c,

title = "Spiral-like star-forming patterns in CALIFA early-type galaxies",

abstract = "Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 <μr mag/□″< 26) star-forming spiral-arm-like features in the periphery of three nearby early-type galaxies (ETGs). These features are of considerable interest because they document the still ongoing inside-out growth of some local ETGs and may add valuable observational insight into the origin and evolution of spiral structure in triaxial stellar systems. A characteristic property of the nebular component in the studied ETGs, classified i+, is a two-radial-zone structure, with the inner zone that displays faint (EW(Hα) ≃ 1 {\AA}) low-ionization nuclear emission-line region (LINER) properties, and the outer one (3 {\AA} ",

keywords = "Galaxies: elliptical and lenticular, cD, Galaxies: ISM, Galaxies: kinematics and dynamics, Galaxies: nuclei, Galaxies: star formation",

author = "Gomes, {J. M.} and P. Papaderos and V{\'i}lchez, {J. M.} and C. Kehrig and J. Iglesias-P{\'a}ramo and I. Breda and Lehnert, {M. D.} and S{\'a}nchez, {S. F.} and B. Ziegler and {Dos Reis}, {S. N.} and J. Bland-Hawthorn and L. Galbany and Bomans, {D. J.} and Rosales-Ortega, {F. F.} and Walcher, {C. J.} and R. Garc{\'i}a-Benito and I. M{\'a}rquez and {Del Olmo}, A. and M. Moll{\'a} and Marino, {R. A.} and C. Catal{\'a}n-Torrecilla and {Gonz{\'a}lez Delgado}, {R. M.} and L{\'o}pez-S{\'a}nchez, {A. R.} and Califa Collaboration",

year = "2016",

month = jan,

day = "1",

doi = "10.1051/0004-6361/201525974",

language = "English",

volume = "585",

pages = "1--6",

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Gomes, JM, Papaderos, P, Vílchez, JM, Kehrig, C, Iglesias-Páramo, J, Breda, I, Lehnert, MD, Sánchez, SF, Ziegler, B, Dos Reis, SN, Bland-Hawthorn, J, Galbany, L, Bomans, DJ, Rosales-Ortega, FF, Walcher, CJ, García-Benito, R, Márquez, I, Del Olmo, A, Mollá, M, Marino, RA, Catalán-Torrecilla, C, González Delgado, RM, López-Sánchez, AR & Collaboration, C 2016, 'Spiral-like star-forming patterns in CALIFA early-type galaxies', Astronomy and Astrophysics, vol. 585, A92, pp. 1-6. https://doi.org/10.1051/0004-6361/201525974

TY - JOUR

T1 - Spiral-like star-forming patterns in CALIFA early-type galaxies

AU - Gomes, J. M.

AU - Papaderos, P.

AU - Vílchez, J. M.

AU - Kehrig, C.

AU - Iglesias-Páramo, J.

AU - Breda, I.

AU - Lehnert, M. D.

AU - Sánchez, S. F.

AU - Ziegler, B.

AU - Dos Reis, S. N.

AU - Bland-Hawthorn, J.

AU - Galbany, L.

AU - Bomans, D. J.

AU - Rosales-Ortega, F. F.

AU - Walcher, C. J.

AU - García-Benito, R.

AU - Márquez, I.

AU - Del Olmo, A.

AU - Mollá, M.

AU - Marino, R. A.

AU - Catalán-Torrecilla, C.

AU - González Delgado, R. M.

AU - López-Sánchez, A. R.

AU - Collaboration, Califa

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 <μr mag/□″< 26) star-forming spiral-arm-like features in the periphery of three nearby early-type galaxies (ETGs). These features are of considerable interest because they document the still ongoing inside-out growth of some local ETGs and may add valuable observational insight into the origin and evolution of spiral structure in triaxial stellar systems. A characteristic property of the nebular component in the studied ETGs, classified i+, is a two-radial-zone structure, with the inner zone that displays faint (EW(Hα) ≃ 1 Å) low-ionization nuclear emission-line region (LINER) properties, and the outer one (3 Å

AB - Based on a combined analysis of SDSS imaging and CALIFA integral field spectroscopy data, we report on the detection of faint (24 <μr mag/□″< 26) star-forming spiral-arm-like features in the periphery of three nearby early-type galaxies (ETGs). These features are of considerable interest because they document the still ongoing inside-out growth of some local ETGs and may add valuable observational insight into the origin and evolution of spiral structure in triaxial stellar systems. A characteristic property of the nebular component in the studied ETGs, classified i+, is a two-radial-zone structure, with the inner zone that displays faint (EW(Hα) ≃ 1 Å) low-ionization nuclear emission-line region (LINER) properties, and the outer one (3 Å

KW - Galaxies: elliptical and lenticular, cD

KW - Galaxies: ISM

KW - Galaxies: kinematics and dynamics

KW - Galaxies: nuclei

KW - Galaxies: star formation

UR - http://www.scopus.com/inward/record.url?scp=84953425737&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201525974

DO - 10.1051/0004-6361/201525974

M3 - Article

AN - SCOPUS:84953425737

SN - 0004-6361

VL - 585

SP - 1

EP - 6

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A92

ER -

Spiral-like star-forming patterns in CALIFA early-type galaxies

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Keywords

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