J/ApJS/237/27 Radio Ammonia Mid-plane Survey (RAMPS) pilot survey (Hogge+, 2018)
The Radio Ammonia Mid-plane Survey (RAMPS) pilot survey.
Hogge T., Jackson J., Stephens I., Whitaker S., Foster J., Camarata M.,
Roshi D.A., Di Francesco J., Longmore S., Loughnane R., Moore T.,
Rathborne J., Sanhueza P., Walsh A.
<Astrophys. J. Suppl. Ser., 237, 27 (2018)>
=2018ApJS..237...27H 2018ApJS..237...27H
ADC_Keywords: Masers; Radio lines; Galactic plane; Surveys; Molecular data
Keywords: ISM: clouds ; stars: formation ; stars: massive
Abstract:
The Radio Ammonia Mid-Plane Survey (RAMPS) is a molecular line survey
that aims to map a portion of the Galactic midplane in the first
quadrant of the Galaxy (l=10°-40°, |b|≤0.4°) using the
Green Bank Telescope. We present results from the pilot survey, which
has mapped approximately 6.5 square degrees in fields centered at
l=10°, 23°, 24°, 28°, 29°, 30°, 31°,
38°, 45°, and 47°. RAMPS observes the NH3 inversion
transitions NH3(1,1)-(5,5), the H2O 61,6-52,3 maser line at
22.235GHz, and several other molecular lines. We present a
representative portion of the data from the pilot survey, including
NH3(1,1) and NH3(2,2) integrated intensity maps, H2O maser
positions, maps of NH3 velocity, NH3 line width, total NH3
column density, and NH3 rotational temperature.
Description:
The Radio Ammonia Mid-Plane Survey (RAMPS) is a new Galactic midplane
molecular line survey, which employs the K-band Focal Plane Array on
the Green Bank Telescope (GBT) to image several NH3 inversion lines
and the 22.235GHz H2O line.
RAMPS observes 13 molecular transitions:
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Mol Transition Frequency Eupper/k Number of
(MHz) (K) receivers
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NH3 (J,K) = (1,1) 23694.47 23 7
NH3 (J,K) = (2,2) 23722.60 64 7
NH3 (J,K) = (3,3) 23870.08 124 7
NH3 (J,K) = (4,4) 24139.35 201 7
NH3 (J,K) = (5,5) 24532.92 295 7
CH3OH JKp = 101-92A- 23444.78 143 7
HC5N J = 9-8 23963.90 6 7
HC5N J = 8-7 21301.26 5 1
HC7N J = 19-18 21431.93 10 1
CH3OH JKp = 122-111A- 21550.34 479 1
HNCO JKp,Ko = 10,1-00,0 21981.57 1 1
H2O JKp,Ko = 61,6-52,3 22235.08 644 1
CCS J = 2-1 22344.03 2 1
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Note. The quantum numbers given in the "Transition" column are J,
the rotational quantum number; K, the projection of J along the
molecular axis of symmetry; Kp, the value of K in the limiting case
of a prolate spheroid molecule; and Ko, the value of K in the
limiting case of an oblate spheroid molecule.
CH3OH 122-111A- is a rotational transition within the first
vibrationally excited state, i.e., v=1.
--------------------------------------------------------------------
We performed observations for RAMPS using the 100m diameter Robert C.
Byrd GBT at the NRAO which operates in a nearly continuous frequency
range of 0.29-115GHz. In 2014, RAMPS was awarded 210hr of observing
time on the GBT for a pilot survey. We performed observations for the
RAMPS pilot study between 2014 March 16 and 2015 January 22.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 39 325 RAMPS H2O masers
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See also:
J/A+A/501/539 : RMS survey. 6cm observations of YSOs (Urquhart+, 2009)
J/MNRAS/416/1764 : H2O Southern Galactic Plane Survey (HOPS) (Walsh+, 2011)
J/MNRAS/426/1972 : HOPS. II (Purcell+, 2012)
J/ApJ/756/60 : A 3mm line survey in 37 IR dark clouds (Sanhueza+, 2012)
J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)
J/MNRAS/442/2240 : Accurate water maser positions from HOPS (Walsh+, 2014)
J/ApJ/806/74 : NH3 line profiles in star-forming regions (Camarata+, 2015)
J/AJ/154/140 : MALT90 kinematic dist. to molecular clumps (Whitaker+, 2017)
http://sites.bu.edu/ramps/ : The Radio Ammonia Mid-Plane Survey (RAMPS) home
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 F6.3 deg GLON [9.6/47.1] Galactic longitude
8- 13 F6.3 deg GLAT [-0.4/0.5] Galactic latitude
15- 18 F4.2 arcsec e_GLON [4.2/4.3] Error on GLON
20- 23 F4.2 arcsec e_GLAT [4.2/4.3] Error on GLAT
25- 29 F5.1 km/s Vel [-84/136] Velocity of brightest spectral channel
31- 35 F5.1 K Int [0.3/931] Intensity of brightest spectral channel
37- 39 A3 --- Assoc Associated environment (1)
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Note (1): Associated environment as follows:
SFR = Star-forming region (185 sources);
AGB = Asymptotic-giant-branch star (92 sources);
U = Unknown (48 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 01-Oct-2018