First direct identification of the barlens vertical structure in galaxy models

Standard

First direct identification of the barlens vertical structure in galaxy models. / Tikhonenko, Iliya S.; Smirnov, Anton A.; Sotnikova, Natalia Ya.

In: Astronomy and Astrophysics, Vol. 648, L4, 16.04.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{a7fa720226f84f798733b6759f5c060f,

title = "First direct identification of the barlens vertical structure in galaxy models",

abstract = "Applying spectral dynamics methods to one typical N-body model with a barlens, we dissect the modelled bar into separate components supported by completely different types of orbits. We identify at least four components: a narrow elongated bar, a boxy bar, and two components contributing to the barlens. We analyse the vertical structure of all components that make up the thick part of the bar, which has a boxy/peanut shape (B/P bulge). We show that the 'peanut' shape is mainly due to the orbits that assemble the boxy part of the face-on bar. We associate the X-shape with the narrow and elongated bar. The wider part of the barlens with square-like isophotes contributes to the boxy shape of the B/P bulge when we observe the galaxy edge-on. However, the part of the barlens with rounded isophotes in the face-on view is a rather flat structure in the vertical direction without any significant off-centre protrusions. Thus, for the first time, we demonstrate that the rounded face-on barlens cannot be entirely associated with the B/P bulge. ",

keywords = "Galaxies: bulges, Galaxies: kinematics and dynamics, Galaxies: structure, galaxies: structure, galaxies: kinematics and dynamics, galaxies: bulges",

author = "Tikhonenko, {Iliya S.} and Smirnov, {Anton A.} and Sotnikova, {Natalia Ya}",

note = "Publisher Copyright: {\textcopyright} ESO 2021.",

year = "2021",

month = apr,

day = "16",

doi = "10.1051/0004-6361/202140703",

language = "English",

volume = "648",

journal = "ASTRONOMY & ASTROPHYSICS",

issn = "0004-6361",

publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - First direct identification of the barlens vertical structure in galaxy models

AU - Tikhonenko, Iliya S.

AU - Smirnov, Anton A.

AU - Sotnikova, Natalia Ya

N1 - Publisher Copyright: © ESO 2021.

PY - 2021/4/16

Y1 - 2021/4/16

N2 - Applying spectral dynamics methods to one typical N-body model with a barlens, we dissect the modelled bar into separate components supported by completely different types of orbits. We identify at least four components: a narrow elongated bar, a boxy bar, and two components contributing to the barlens. We analyse the vertical structure of all components that make up the thick part of the bar, which has a boxy/peanut shape (B/P bulge). We show that the 'peanut' shape is mainly due to the orbits that assemble the boxy part of the face-on bar. We associate the X-shape with the narrow and elongated bar. The wider part of the barlens with square-like isophotes contributes to the boxy shape of the B/P bulge when we observe the galaxy edge-on. However, the part of the barlens with rounded isophotes in the face-on view is a rather flat structure in the vertical direction without any significant off-centre protrusions. Thus, for the first time, we demonstrate that the rounded face-on barlens cannot be entirely associated with the B/P bulge.

AB - Applying spectral dynamics methods to one typical N-body model with a barlens, we dissect the modelled bar into separate components supported by completely different types of orbits. We identify at least four components: a narrow elongated bar, a boxy bar, and two components contributing to the barlens. We analyse the vertical structure of all components that make up the thick part of the bar, which has a boxy/peanut shape (B/P bulge). We show that the 'peanut' shape is mainly due to the orbits that assemble the boxy part of the face-on bar. We associate the X-shape with the narrow and elongated bar. The wider part of the barlens with square-like isophotes contributes to the boxy shape of the B/P bulge when we observe the galaxy edge-on. However, the part of the barlens with rounded isophotes in the face-on view is a rather flat structure in the vertical direction without any significant off-centre protrusions. Thus, for the first time, we demonstrate that the rounded face-on barlens cannot be entirely associated with the B/P bulge.

KW - Galaxies: bulges

KW - Galaxies: kinematics and dynamics

KW - Galaxies: structure

KW - galaxies: structure

KW - galaxies: kinematics and dynamics

KW - galaxies: bulges

UR - http://www.scopus.com/inward/record.url?scp=85104297562&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202140703

DO - 10.1051/0004-6361/202140703

M3 - Article

AN - SCOPUS:85104297562

VL - 648

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

M1 - L4

ER -

ID: 89558793