J/MNRAS/471/4571 Magellanic Inter-Cloud Project. III (Carrera+, 2017)
The Magellanic Inter-Cloud Project (MAGIC).
III: first spectroscopic evidence of a dwarf stripping a dwarf.
Carrera R., Conn B.C., Noel N.E.D., Read J.I., Lopez Sanchez A.R.
<Mon. Not. R. Astron. Soc., 471, 4571-4578 (2017)>
=2017MNRAS.471.4571C 2017MNRAS.471.4571C (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Photometry, infrared ; Radial velocities
Keywords: galaxies: interactions - Local Group - Magellanic Clouds
Abstract:
The Magellanic Bridge (MB) is a gaseous stream that links the Large
(LMC) and Small (SMC) Magellanic Clouds. Current simulations suggest
that the MB forms from a recent interaction between the Clouds. In
this scenario, the MB should also have an associated stellar bridge
formed by stars tidally stripped from the SMC by the LMC. There are
several observational evidences for these stripped stars, from the
presence of intermediate age populations in the MB and carbon stars,
to the recent observation of an over-density of RR Lyrae stars offset
from the MB. However, spectroscopic confirmation of stripped stars in
the MB remains lacking. In this paper, we use medium resolution
spectra to derive the radial velocities and metallicities of stars in
two fields along the MB. We show from both their chemistry and
kinematics that the bulk of these stars must have been tidally
stripped from the SMC. This is the first spectroscopic evidence for a
dwarf galaxy being
Description:
We have selected two fields studied in previous MAGIC papers centred
at [RA=+02.4h, DE=-72.0° (0224-7200)] and
[RA=02.4h, DE=-74.0° (0224-7400)], respectively. The former is
located at 6.9° and 14.1° from the SMC and LMC centres,
respectively; the later at 6.5° and 14.0° from the SMC and LMC
centres, respectively.
The observations were secured on the nights of the 2014 November 12
and 13 and 2016 November 14 with the AAOmega spectrograph fed by the
Two Degree Field (2dF) multi-object systems installed at the prime
focus of the Anglo-Australian Telescope located at Siding Spring
Observatory (Australia)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 63 514 Observed stars
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See also:
J/ApJS/101/41 : SMC and Bridge extended catalog (Bica+ 1995)
J/MNRAS/339/105 : Western Magellanic Bridge HI observations (Muller+, 2003)
J/ApJ/658/345 : CRIc photometry of Magellanic Bridge Fields (Harris, 2007)
J/ApJ/658/358 : Ae/Be stars of Magellanic Bridge in JHKs (Nishiyama+, 2007)
J/A+A/551/A78 : Magellanic Bridge Catalogue of Stars - MBCS (Bagheri+, 2013)
J/ApJ/785/162 : YSO candidates in the Magellanic Bridge (Chen+, 2014)
J/ApJ/795/108 : Stellar populations in Magellanic bridge (Skowron+, 2014)
J/MNRAS/467/1776 : Faraday rotation in Magellanic Bridge (Kaczmarek+, 2017)
J/AcA/67/363 : New star clusters in the Magellanic system (Sitek+, 2017)
J/AJ/159/82 : Extended objects in Magellanic clouds (Bica+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- 2MASS 2MASS name, 2MASSHHMMSSss+DDMMSSs
23- 32 F10.7 deg RAdeg Right ascension (J2000)
34- 44 F11.7 deg DEdeg Declination (J2000)
46- 51 F6.3 mag Ksmag ?=99.999 Ks magnitude
53- 58 F6.1 km/s RV Radial velocity
60- 63 F4.1 km/s e_RV Radial velocity error
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History:
From electronic version of the journal
References:
Noel et al., Paper I 2013ApJ...768..109N 2013ApJ...768..109N
Noel et al., Paper II 2015MNRAS.452.4222N 2015MNRAS.452.4222N
(End) Patricia Vannier [CDS] 22-Jun-2020