CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
research
Extinction ratios in the inner Galaxy as revealed by the VVV survey
Authors
Javier Alonso-García
Márcio Catelan
+8 more
Oscar A. Gonzalez
Maren Hempel
Philip W. Lucas
Dante Minniti
Rodrigo Contreras Ramos
Roberto K. Saito
Elena Valenti
Manuela Zoccali
Publication date
13 October 2017
Publisher
'American Astronomical Society'
Doi
Cite
View
on
arXiv
Abstract
Accepted for publication in ApJ Letters, 10 pages, 3 Figures, 2 Tables © 2017 The American Astronomical Society. All rights reserved.Interstellar extinction towards the Galactic Center is large and significantly differential. Its reddening and dimming effects in red clump stars in the Galactic Bulge can be exploited to better constrain the extinction law towards the innermost Galaxy. By virtue of a deep and complete catalog of more than 30 million objets at
∣
l
∣
≤
2.7
deg
|l|\le2.7\deg
∣
l
∣
≤
2.7
de
g
and
∣
b
∣
≤
1.55
deg
|b|\le1.55\deg
∣
b
∣
≤
1.55
de
g
obtained from VVV survey observations, we apply the red clump method to infer the selective-to-total extinction ratios in the
Z
Z
Z
,
Y
Y
Y
,
J
J
J
,
H
H
H
and
K
s
K_s
K
s
broadband near-infrared filters. The measured values are smaller than previously reported, and are not constant, with mean values, e.g.,
A
K
S
/
E
(
J
−
K
s
)
=
0.428
±
0.005
±
0.04
A_{K_S}/E(J-K_s)=0.428\pm0.005\pm0.04
A
K
S
/
E
(
J
−
K
s
)
=
0.428
±
0.005
±
0.04
and
A
K
S
/
E
(
H
−
K
s
)
=
1.104
±
0.022
±
0.2
A_{K_S}/E(H-K_s)=1.104\pm0.022\pm0.2
A
K
S
/
E
(
H
−
K
s
)
=
1.104
±
0.022
±
0.2
. We also obtain a ratio
A
Z
A_Z
A
Z
:
A
Y
A_Y
A
Y
:
A
J
A_J
A
J
:
A
H
A_H
A
H
:
A
K
S
A_{K_S}
A
K
S
of 7.74:5.38:3.30:1.88:1.0, implying extinction towards the Galactic Center to follow a distribution as a function of wavelength steeper than previously reported, consistent with a power law
A
λ
∝
λ
−
2.47
A_{\lambda}\propto{\lambda}^{-2.47}
A
λ
∝
λ
−
2.47
in the near-infrared.Peer reviewedFinal Accepted Versio
Similar works
Full text
Open in the Core reader
Download PDF
Available Versions
Repositorio Institucional Académico Universidad Andrés Bello
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:repositorio.unab.cl:ria/56...
Last time updated on 01/04/2020
Crossref
See this paper in CORE
Go to the repository landing page
Download from data provider
info:doi/10.3847%2F2041-8213%2...
Last time updated on 05/06/2019